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Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2010	Apr. 19, 2010
Statement [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2010
Document Fiscal Year Focus	2010
Document Fiscal Period Focus	Q1
Trading Symbol	AA
Entity Registrant Name	ALCOA INC
Entity Central Index Key	0000004281
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		1,021,019,821

Statement of Consolidated Operations - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2010	Mar. 31, 2009
Statement [Line Items]
Sales (J)	$ 4,887	$ 4,147
Cost of goods sold (exclusive of expenses below)	4,013	4,143
Selling, general administrative, and other expenses	239	244
Research and development expenses	39	41
Provision for depreciation, depletion, and amortization	358	283
Restructuring and other charges (D)	187	69
Interest expense	118	114
Other expenses, net (I)	21	30
Total costs and expenses	4,975	4,924
Loss from continuing operations before income taxes	(88)	(777)
Provision (benefit) for income taxes (M)	84	(307)
Loss from continuing operations	(172)	(470)
Loss from discontinued operations (C)	(7)	(17)
Net loss	(179)	(487)
Less: Net income attributable to noncontrolling interests	22	10
NET LOSS ATTRIBUTABLE TO ALCOA	(201)	(497)
AMOUNTS ATTRIBUTABLE TO ALCOA COMMON SHAREHOLDERS:
Loss from continuing operations	(194)	(480)
Loss from discontinued operations	(7)	(17)
Net loss	$ (201)	$ (497)
Basic:
Loss from continuing operations	$ (0.19)	$ (0.59)
Loss from discontinued operations	(0.01)	(0.02)
Net loss	(0.20)	(0.61)
Diluted:
Loss from continuing operations	(0.19)	(0.59)
Loss from discontinued operations	(0.01)	(0.02)
Net loss	(0.20)	(0.61)
Dividends paid per common share	$ 0.03	$ 0.17

Consolidated Balance Sheet - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Consolidated Balance Sheet - USD ($) $ in Millions	Mar. 31, 2010	Dec. 31, 2009
Current assets:
Cash and cash equivalents	$ 1,292	$ 1,481
Receivables from customers, less allowances of $61 in 2010 and $70 in 2009	1,647	1,529
Other receivables	308	653
Inventories (F)	2,394	2,328
Prepaid expenses and other current assets	978	1,031
Total current assets	6,619	7,022
Properties, plants, and equipment	35,757	35,525
Less: accumulated depreciation, depletion, and amortization	16,090	15,697
Properties, plants, and equipment, net	19,667	19,828
Goodwill	5,065	5,051
Investments	1,058	1,061
Deferred income taxes	2,918	2,958
Other noncurrent assets	2,388	2,419
Assets held for sale (C)	120	133
Total assets	37,835	38,472
Current liabilities:
Short-term borrowings	166	176
Accounts payable, trade	1,868	1,954
Accrued compensation and retirement costs	799	925
Taxes, including income taxes	371	345
Other current liabilities	1,274	1,345
Long-term debt due within one year	666	669
Total current liabilities	5,144	5,414
Long-term debt, less amount due within one year	8,925	8,974
Accrued pension benefits (O)	2,547	3,163
Accrued postretirement benefits	2,689	2,696
Other noncurrent liabilities and deferred credits	2,631	2,605
Liabilities of operations held for sale (C)	49	60
Total liabilities	$ 21,985	$ 22,912
COMMITMENTS AND CONTINGENCIES (H)
CONVERTIBLE SECURITIES OF SUBSIDIARY (G)		$ 40
Alcoa shareholders' equity:
Preferred stock	$ 55	55
Common stock (K)	1,141	1,097
Additional capital (K)	7,100	6,608
Retained earnings	10,787	11,020
Treasury stock, at cost	(4,191)	(4,268)
Accumulated other comprehensive loss	(2,223)	(2,092)
Total Alcoa shareholders' equity	12,669	12,420
Noncontrolling interests	3,181	3,100
Total equity	15,850	15,520
Total liabilities and equity	$ 37,835	$ 38,472

Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2010	Dec. 31, 2009
Statement [Line Items]
Receivables from customers, allowances	$ 61	$ 70

Statement of Consolidated Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2010	Mar. 31, 2009
CASH FROM OPERATIONS
Net loss	$ (179)	$ (487)
Adjustments to reconcile net loss to cash from operations:
Depreciation, depletion, and amortization	358	283
Deferred income taxes	68	(24)
Equity (income) loss, net of dividends	(15)	27
Restructuring and other charges (D)	187	69
Net gain from investing activities - asset sales (I)	(2)	(27)
Loss from discontinued operations (C)	7	17
Stock-based compensation	25	26
Other	65	37
Changes in assets and liabilities, excluding effects of acquisitions, divestitures, and foreign currency translation adjustments:
(Increase) decrease in receivables	(176)	302
(Increase) decrease in inventories	(105)	523
Decrease in prepaid expenses and other current assets	14	11
(Decrease) in accounts payable, trade	(55)	(474)
(Decrease) in accrued expenses	(326)	(303)
Increase (decrease) in taxes, including income taxes	321	(339)
Pension contributions	(22)	(34)
(Increase) decrease in noncurrent assets	(9)	30
Increase in noncurrent liabilities	53	98
(Increase) decrease in net assets held for sale (C)	(17)	1
CASH PROVIDED FROM (USED FOR) CONTINUING OPERATIONS	192	(264)
CASH PROVIDED FROM (USED FOR) DISCONTINUED OPERATIONS	7	(7)
CASH PROVIDED FROM (USED FOR) OPERATIONS	199	(271)
FINANCING ACTIVITIES
Net change in short-term borrowings	(9)	209
Net change in commercial paper		(1,202)
Additions to long-term debt	53	689
Debt issuance costs		(13)
Payments on long-term debt	(86)	(1)
Proceeds from exercise of employee stock options	5
Issuance of common stock (L)		876
Dividends paid to shareholders	(32)	(137)
Dividends paid to noncontrolling interests	(72)	(77)
Contributions from noncontrolling interests	27	159
Acquisitions of noncontrolling interests (G)	(66)
CASH (USED FOR) PROVIDED FROM FINANCING ACTIVITIES	(180)	503
INVESTING ACTIVITIES
Capital expenditures	(221)	(468)
Capital expenditures of discontinued operations		(3)
Acquisitions, net of cash acquired	5	18
Proceeds from the sale of assets and businesses		116
Additions to investments	(129)	(29)
Sales of investments	137	506
Other		(4)
CASH (USED FOR) PROVIDED FROM INVESTING ACTIVITIES	(208)	136
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS		1
Net change in cash and cash equivalents	(189)	369
Cash and cash equivalents at beginning of year	1,481	762
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 1,292	$ 1,131

Statement of Changes in Consolidated Equity - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2010	Mar. 31, 2009
Statement [Line Items]
Beginning Balance	$ 15,520	$ 14,332
Net (loss) income	(179)	(487)
Other comprehensive (loss) income	(24)	410
Cash dividends declared:
Preferred @ $0.9375 in 2010 and $1.875 in 2009 per share	(1)	(1)
Common @ $0.03 in 2010 and $0.20 in 2009 per share	(31)	(168)
Noncontrolling interests	(72)	(77)
Beneficial conversion option on convertible notes		66
Stock-based compensation	25	26
Common stock issued: compensation plans	10	(13)
Issuance of common stock (K)	600	876
Contributions	27	159
Purchase of equity from noncontrolling interest	(6)	(179)
Other	(19)	(7)
Ending Balance	15,850	14,937
Preferred stock
Statement [Line Items]
Beginning Balance	55	55
Cash dividends declared:
Ending Balance	55	55
Common stock
Statement [Line Items]
Beginning Balance	1,097	925
Cash dividends declared:
Issuance of common stock (K)	44	172
Ending Balance	1,141	1,097
Additional capital
Statement [Line Items]
Beginning Balance	6,608	5,850
Cash dividends declared:
Beneficial conversion option on convertible notes		66
Stock-based compensation	25	26
Common stock issued: compensation plans	(67)	(67)
Issuance of common stock (K)	556	704
Purchase of equity from noncontrolling interest	(2)
Other	(20)
Ending Balance	7,100	6,579
Retained earnings
Statement [Line Items]
Beginning Balance	11,020	12,400
Net (loss) income	(201)	(497)
Cash dividends declared:
Preferred @ $0.9375 in 2010 and $1.875 in 2009 per share	(1)	(1)
Common @ $0.03 in 2010 and $0.20 in 2009 per share	(31)	(168)
Ending Balance	10,787	11,734
Treasury stock
Statement [Line Items]
Beginning Balance	(4,268)	(4,326)
Cash dividends declared:
Common stock issued: compensation plans	77	54
Ending Balance	(4,191)	(4,272)
Accumulated other comprehensive loss
Statement [Line Items]
Beginning Balance	(2,092)	(3,169)
Other comprehensive (loss) income	(131)	413
Cash dividends declared:
Ending Balance	(2,223)	(2,756)
Non-controlling interests
Statement [Line Items]
Beginning Balance	3,100	2,597
Net (loss) income	22	10
Other comprehensive (loss) income	107	(3)
Cash dividends declared:
Noncontrolling interests	(72)	(77)
Contributions	27	159
Purchase of equity from noncontrolling interest	(4)	(179)
Other	1	(7)
Ending Balance	$ 3,181	$ 2,500

Statement of Changes in Consolidated Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2010	Mar. 31, 2009
Statement [Line Items]
Preferred, per share	$ 0.9375	$ 1.875
Common, per share	$ 0.03	$ 0.20

Statement of Consolidated Comprehensive (Loss) Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2010	Mar. 31, 2009
Statement [Line Items]
Net (loss) income	$ (179)	$ (487)
Other comprehensive (loss) income, net of tax:
Change in unrecognized losses and prior service cost related to pension and postretirement benefit plans	30	27
Foreign currency translation adjustments (A)	2	(91)
Unrealized (losses) gains on available-for-sale securities:
Unrealized holding (losses) gains	(3)	48
Net amount reclassified to earnings	2	380
Net change in unrealized (losses) gains on available-for-sale securities	(1)	428
Unrecognized (losses) gains on derivatives (P):
Net change from periodic revaluations	(73)	100
Net amount reclassified to earnings	18	(54)
Net unrecognized (losses) gains on derivatives	(55)	46
Total Other comprehensive (loss) income, net of tax	(24)	410
Comprehensive (loss) income	(203)	(77)
Parent
Statement [Line Items]
Net (loss) income	(201)	(497)
Other comprehensive (loss) income, net of tax:
Change in unrecognized losses and prior service cost related to pension and postretirement benefit plans	29	26
Foreign currency translation adjustments (A)	(103)	(87)
Unrealized (losses) gains on available-for-sale securities:
Unrealized holding (losses) gains	(3)	48
Net amount reclassified to earnings	2	380
Net change in unrealized (losses) gains on available-for-sale securities	(1)	428
Unrecognized (losses) gains on derivatives (P):
Net change from periodic revaluations	(74)	100
Net amount reclassified to earnings	18	(54)
Net unrecognized (losses) gains on derivatives	(56)	46
Total Other comprehensive (loss) income, net of tax	(131)	413
Comprehensive (loss) income	(332)	(84)
Non-controlling interests
Statement [Line Items]
Net (loss) income	22	10
Other comprehensive (loss) income, net of tax:
Change in unrecognized losses and prior service cost related to pension and postretirement benefit plans	1	1
Foreign currency translation adjustments (A)	105	(4)
Unrecognized (losses) gains on derivatives (P):
Net change from periodic revaluations	1
Net unrecognized (losses) gains on derivatives	1
Total Other comprehensive (loss) income, net of tax	107	(3)
Comprehensive (loss) income	$ 129	$ 7

Basis of Presentation	3 Months Ended
Basis of Presentation	Mar. 31, 2010
Statement [Line Items]
Basis of Presentation	A. Basis of Presentation – The interim Consolidated Financial Statements of Alcoa Inc. and its subsidiaries (“Alcoa” or the “Company”) are unaudited. The Consolidated Financial Statements include all adjustments, consisting of normal recurring adjustments, considered necessary by management to fairly state the Company’s results of operations, financial position, and cash flows. The results reported in these Consolidated Financial Statements are not necessarily indicative of the results that may be expected for the entire year. The 2009 year-end balance sheet data was derived from audited financial statements but does not include all disclosures required by accounting principles generally accepted in the United States of America (GAAP). This Form 10-Q report should be read in conjunction with Alcoa’s Annual Report on Form 10-K for the year ended December 31, 2009, which includes all disclosures required by GAAP. Certain amounts in previously issued financial statements were reclassified to conform to the current period presentation. Effective January 1, 2010, the functional currency of a subsidiary located in Brazil (that is part of Alcoa World Alumina and Chemicals, which is 60% owned by Alcoa and 40% owned by Alumina Limited) was changed from the U.S. dollar to the Brazilian real (BRL). This change was made as a result of changes in the operations of the business following the completion of the São Luís refinery expansion and Juruti bauxite mine development in the second half of 2009. In connection with this change, on January 1, 2010, an adjustment of $300 was recorded as an increase to the net nonmonetary assets of this subsidiary (primarily properties, plants, and equipment) with a corresponding adjustment to the foreign currency translation component of Accumulated other comprehensive loss. The functional currency of all of Alcoa’s Brazilian operations is now BRL.

Recently Adopted and Recently Issued Accounting Guidance	3 Months Ended
	Mar. 31, 2010
Statement [Line Items]
Recently Adopted and Recently Issued Accounting Guidance	B. Recently Adopted and Recently Issued Accounting Guidance *Adopted* On January 1, 2010, Alcoa adopted changes issued by the Financial Accounting Standards Board (FASB) to accounting for variable interest entities. These changes require an enterprise to perform an analysis to determine whether the enterprise’s variable interest or interests give it a controlling financial interest in a variable interest entity; to require ongoing reassessments of whether an enterprise is the primary beneficiary of a variable interest entity; to eliminate the solely quantitative approach previously required for determining the primary beneficiary of a variable interest entity; to add an additional reconsideration event for determining whether an entity is a variable interest entity when any changes in facts and circumstances occur such that holders of the equity investment at risk, as a group, lose the power from voting rights or similar rights of those investments to direct the activities of the entity that most significantly impact the entity’s economic performance; and to require enhanced disclosures that will provide users of financial statements with more transparent information about an enterprise’s involvement in a variable interest entity. The adoption of these changes had no impact on the Consolidated Financial Statements. On January 1, 2010, Alcoa adopted changes issued by the FASB to accounting for transfers of financial assets. These changes remove the concept of a qualifying special-purpose entity and remove the exception from the application of variable interest accounting to variable interest entities that are qualifying special-purpose entities; limit the circumstances in which a transferor derecognizes a portion or component of a financial asset; define a participating interest; require a transferor to recognize and initially measure at fair value all assets obtained and liabilities incurred as a result of a transfer accounted for as a sale; and require enhanced disclosure. The adoption of these changes had no impact on the Consolidated Financial Statements. In March 2010, management terminated the Company’s accounts receivable securitization program (see Note N); had this program not been terminated, the adoption of these changes would have resulted in a $250 increase to both Receivables from customers and Short-term borrowings on the Consolidated Balance Sheet. Effective January 1, 2010, Alcoa adopted changes issued by the FASB on January 6, 2010, for a scope clarification to the FASB’s previously-issued guidance on accounting for noncontrolling interests in consolidated financial statements. These changes clarify the accounting and reporting guidance for noncontrolling interests and changes in ownership interests of a consolidated subsidiary. An entity is required to deconsolidate a subsidiary when the entity ceases to have a controlling financial interest in the subsidiary. Upon deconsolidation of a subsidiary, an entity recognizes a gain or loss on the transaction and measures any retained investment in the subsidiary at fair value. The gain or loss includes any gain or loss associated with the difference between the fair value of the retained investment in the subsidiary and its carrying amount at the date the subsidiary is deconsolidated. In contrast, an entity is required to account for a decrease in its ownership interest of a subsidiary that does not result in a change of control of the subsidiary as an equity transaction. The adoption of these changes had no impact on the Consolidated Financial Statements. Effective January 1, 2010, Alcoa adopted changes issued by the FASB on January 21, 2010, to disclosure requirements for fair value measurements. Specifically, the changes require a reporting entity to disclose separately the amounts of significant transfers in and out of Level 1 and Level 2 fair value measurements and describe the reasons for the transfers. The changes also clarify existing disclosure requirements related to how assets and liabilities should be grouped by class and valuation techniques used for recurring and nonrecurring fair value measurements. The adoption of these changes had no impact on the Consolidated Financial Statements. Effective January 1, 2010, Alcoa adopted changes issued by the FASB on February 24, 2010, to accounting for and disclosure of events that occur after the balance sheet date but before financial statements are issued or available to be issued, otherwise known as “subsequent events.” Specifically, these changes clarified that an entity that is required to file or furnish its financial statements with the SEC is not required to disclose the date through which subsequent events have been evaluated. Other than the elimination of disclosing the date through which management has performed its evaluation for subsequent events (see Note Q), the adoption of these changes had no impact on the Consolidated Financial Statements. *Issued* In October 2009, the FASB issued changes to revenue recognition for multiple-deliverable arrangements. These changes require separation of consideration received in such arrangements by establishing a selling price hierarchy (not the same as fair value) for determining the selling price of a deliverable, which will be based on available information in the following order: vendor-specific objective evidence, third-party evidence, or estimated selling price; eliminate the residual method of allocation and require that the consideration be allocated at the inception of the arrangement to all deliverables using the relative selling price method, which allocates any discount in the arrangement to each deliverable on the basis of each deliverable’s selling price; require that a vendor determine its best estimate of selling price in a manner that is consistent with that used to determine the price to sell the deliverable on a standalone basis; and expand the disclosures related to multiple-deliverable revenue arrangements. These changes become effective for Alcoa on January 1, 2011. Management has determined that the adoption of these changes will not have an impact on the Consolidated Financial Statements, as Alcoa does not currently have any such arrangements with its customers. In January 2010, the FASB issued changes to disclosure requirements for fair value measurements. Specifically, the changes require a reporting entity to disclose, in the reconciliation of fair value measurements using significant unobservable inputs (Level 3), separate information about purchases, sales, issuances, and settlements (that is, on a gross basis rather than as one net number). These changes become effective for Alcoa beginning January 1, 2011. Other than the additional disclosure requirements, management has determined these changes will not have an impact on the Consolidated Financial Statements. In March 2010, the FASB issued changes related to existing accounting requirements for embedded credit derivatives. Specifically, the changes clarify the scope exception regarding when embedded credit derivative features are not considered embedded derivatives subject to potential bifurcation and separate accounting. These changes become effective for Alcoa on July 1, 2010. Management has determined these changes will not have an impact on the Consolidated Financial Statements.

Discontinued Operations and Assets Held for Sale

3 Months Ended

Mar. 31, 2010

Statement [Line Items]

Discontinued Operations and Assets Held for Sale

C. Discontinued Operations and Assets Held for Sale – For the first quarter ended March 31, 2010, there were no active businesses classified as discontinued operations. The Electrical and Electronic Solutions (EES) business (parts of which were sold in June 2009 and December 2009) was included in discontinued operations for the first quarter ended March 31, 2009.

The following table details selected financial information of discontinued operations:


	First quarter ended March 31,
	2010			2009
Sales	$	—		$	155

Loss from operations before income taxes	$	(12	)	$	(24	)
Benefit for income taxes		5			7

Loss from discontinued operations	$	(7	)	$	(17	)

In the 2010 first quarter, discontinued operations included an additional loss for the wire harness and electrical portion of the EES business sold in June 2009 as a result of a contract settlement with a former customer of this business (see Note E). In the 2009 first quarter, loss from discontinued operations was comprised of the operational results of the EES business.

For both periods presented in the accompanying Consolidated Balance Sheet, the assets and liabilities of operations classified as held for sale included the Global Foil business (one remaining plant located in Brazil), the Transportation Products Europe business, and the Hawesville, KY automotive casting facility.

The major classes of assets and liabilities of operations held for sale were as follows:


	March 31, 2010		December 31, 2009
Assets:
Receivables	$	46	$	41
Inventories		29		26
Properties, plants, and equipment		29		45
Other assets		16		21

Assets held for sale	$	120	$	133

Liabilities:
Accounts payable, trade	$	22	$	25
Accrued expenses		27		35

Liabilities of operations held for sale	$	49	$	60

Restructuring and Other Charges

3 Months Ended

Mar. 31, 2010

Statement [Line Items]

Restructuring and Other Charges

D. Restructuring and Other Charges – In the first quarter of 2010, Alcoa recorded Restructuring and other charges of $187 ($119 after-tax and noncontrolling interests), which were comprised of the following components: $129 ($81 after-tax and noncontrolling interests) in asset impairments and $46 ($29 after-tax and noncontrolling interests) in other exit costs related to the permanent shutdown and planned demolition of certain idled structures at five U.S. locations and $12 ($9 after-tax and noncontrolling interests) in net charges for various other restructuring activities, including charges for the layoff of approximately 220 employees. In the 2010 first quarter, management approved the permanent shutdown and demolition of the following structures, each of which was previously temporarily idled for different reasons: the Eastalco smelter located in Frederick, MD (capacity of 195 kmt-per-year), the smelter located in Badin, NC (capacity of 60 kmt-per-year), an aluminum fluoride plant in Point Comfort, TX, a paste plant and cast house in Massena, NY, and one potline at the smelter in Warrick, IN (capacity of 40 kmt-per-year). This decision was made after a comprehensive strategic analysis was performed to determine the best course of action for each facility. Factors leading to this decision included current market fundamentals, cost competitiveness, other existing idle capacity, required future capital investment, and restart costs, as well as the elimination of ongoing holding costs. The asset impairments of $129 represent the write off of the remaining book value of properties, plants, and equipment related to these facilities. Additionally, remaining inventories, mostly operating supplies, were written down to their net realizable value resulting in a charge of $8 ($5 after-tax and noncontrolling interests), which was recorded in Cost of goods sold on the accompanying Statement of Consolidated Operations. The other exit costs of $46 represent $30 ($19 after-tax and noncontrolling interests) in asset retirement obligations and $14 ($9 after-tax) in environmental remediation, both triggered by the decision to permanently shutdown and demolish these structures, and $2 ($1 after-tax and noncontrolling interests) in other related costs.

In the first quarter of 2009, Alcoa recorded Restructuring and other charges of $69 ($46 after-tax and noncontrolling interests), which were comprised of the following components: $48 ($32 after-tax and noncontrolling interests) for the layoff of approximately 2,500 employees (2,190 in the Engineered Products and Solutions segment, 160 in the Primary Metals segment, 60 in the Flat-Rolled Products segment, and 90 in Corporate) to address the impact of the global economic downturn on Alcoa’s businesses; $18 ($12 after-tax) for the write-off of previously capitalized third-party costs related to potential business acquisitions due to the adoption of changes to accounting for business combinations; and $3 ($2 after-tax and noncontrolling interests) in net charges associated with previously approved restructuring programs.

Alcoa does not include Restructuring and other charges in the results of its reportable segments. The pretax impact of allocating Restructuring and other charges to such results would have been as follows:


	First quarter ended March 31,
	2010			2009
Alumina	$	12		$	—
Primary Metals		150			11
Flat-Rolled Products		(5	)		4
Engineered Products and Solutions		4			27

Segment total		161			42
Corporate		26			27

Total restructuring and other charges	$	187		$	69

As of March 31, 2010, approximately 90 of the 220 employees associated with 2010 restructuring programs, approximately 4,900 of the 6,600 employees associated with 2009 restructuring programs, and approximately 5,900 of the 6,200 employees associated with 2008 restructuring programs were terminated. The remaining terminations for all of these restructuring programs are expected to be completed by the end of 2010. In the 2010 first quarter, cash payments of $2, $37, and $7 were made against the layoff reserves related to the 2010, 2009, and 2008 restructuring programs, respectively.

Activity and reserve balances for restructuring charges are as follows:


	Layoff costs			Other exit costs			Total
Reserve balances at December 31, 2008	$	251		$	77		$	328

2009:
Cash payments		(203	)		(18	)		(221	)
Restructuring charges		186			13			199
Other*		(74	)		(6	)		(80	)

Reserve balances at December 31, 2009		160			66			226

2010:
Cash payments		(47	)		(6	)		(53	)
Restructuring charges		8			49			57
Other*		(14	)		(41	)		(55	)

Reserve balances at March 31, 2010	$	107		$	68		$	175

Other includes reversals of previously recorded restructuring charges and the effects of foreign currency translation. In 2010, Other for other exit costs also included a reclassification of the following restructuring charges: $30 in asset retirement and $14 in environmental obligations, as these liabilities were included in Alcoa’s separate reserves for asset retirement obligations and environmental remediation (see Note H), respectively. In 2009, Other for layoff costs also included a reduction of $26 for reserves related to the wire harness and electrical portion of the EES business as Platinum Equity assumed these obligations.

The remaining reserves are expected to be paid in cash during 2010, with the exception of approximately $65 to $70, which is expected to be paid over the next several years for ongoing site remediation work, special termination benefit payments, and lease termination costs.

Acquisitions and Divestitures	3 Months Ended
Acquisitions and Divestitures	Mar. 31, 2010
Statement [Line Items]
Acquisitions and Divestitures	E. Acquisitions and Divestitures – On March 31, 2009, Alcoa completed a non-cash exchange of its 45.45% stake in the Sapa AB joint venture for Orkla ASA’s 50% stake in the Elkem Aluminium ANS joint venture. The exchange transaction resulted in the recognition of a $188 gain ($133 after-tax) in the first quarter of 2009. In the 2010 first quarter, the purchase price allocation was finalized based on the completion of a valuation study resulting in goodwill of $48, half of which is deductible for U.S. income tax purposes, and a corresponding reduction in properties, plants, and equipment. There was no change to the gain recognized on the transaction in 2009. Under business combination accounting, prior periods, beginning with the period of acquisition, are required to be revised to reflect changes to the original purchase price allocation; however, this $48 was deemed immaterial for this purpose. On June 15, 2009, Alcoa completed the divestiture of the wire harness and electrical portion of the EES business to Platinum Equity, effective June 1, 2009. Alcoa recognized a loss of $129 ($168 pretax) in discontinued operations in 2009 for this transaction. In the 2010 first quarter, Alcoa recognized an additional loss of $6 ($9 pretax) in discontinued operations as a result of a contract settlement with a former customer of this business (see Note C).

Inventories

3 Months Ended

Mar. 31, 2010

Statement [Line Items]

Inventories

F. Inventories


	March 31, 2010		December 31, 2009
Finished goods	$	460	$	441
Work-in-process		726		680
Bauxite and alumina		638		593
Purchased raw materials		331		359
Operating supplies		239		255

	$	2,394	$	2,328

At March 31, 2010 and December 31, 2009, the total amount of inventories valued on a last in, first out (LIFO) basis was 35%. If valued on an average-cost basis, total inventories would have been $738 and $717 higher at March 31, 2010 and December 31, 2009, respectively.

Investments	3 Months Ended
Investments	Mar. 31, 2010
Statement [Line Items]
Investments	G. Investments – In December 2009, Alcoa and Saudi Arabian Mining Company (known as “Ma’aden”) entered into a 30-year joint venture shareholders’ agreement setting forth the terms for the development, construction, ownership, and operation of an integrated bauxite mine, alumina refinery, aluminum smelter, and rolling mill, in Saudi Arabia. The joint venture was to be owned 60% by Ma’aden with the other 40% being controlled by Alcoa through a special-purpose vehicle (SPV). Through this SPV arrangement, Alcoa and Aluminum Financing Limited would each have a 20% economic interest in the joint venture. Aluminum Financing Limited’s investment was in the form of subordinated, participating convertible notes issued by the SPV (the “Notes”), which had common equity rights in the SPV and were to be converted into permanent equity at a future date based on certain conditions as defined in the underlying SPV agreement. In March 2010, Alcoa and Ma’aden executed a supplement to the shareholders’ agreement and modified the ownership structure such that the joint venture now will be owned 74.9% by Ma’aden and 25.1% by Alcoa. Ma’aden and Alcoa will have put and call options, respectively, whereby Ma’aden can require Alcoa to purchase from Ma’aden, or Alcoa can require Ma’aden to sell to Alcoa, a 14.9% interest in the joint venture at the then fair value. These options may only be exercised in a six-month window that opens five years after the Commercial Production Date (as defined in the shareholders’ agreement) and, if exercised, must be exercised for the full 14.9% interest. In addition, Alcoa will pay $34 (rather than the previously-disclosed $55) to Ma’aden, representing Alcoa’s pro rata share of certain agreed upon pre-incorporation costs incurred by Ma’aden before formation of the joint venture; this payment is due on August 1, 2010. The Alcoa affiliate that will hold Alcoa’s interests in the smelting company and the rolling mill company will be wholly owned by Alcoa, and the Alcoa affiliate that will hold Alcoa’s interests in the mining and refining company will be owned 60% (or more) by Alcoa and 40% by Alumina Limited. Except in limited circumstances, Alcoa may not sell, transfer or otherwise dispose of or encumber or enter into any agreement in respect of the votes or other rights attached to its interests in the joint venture without Ma’aden’s prior written consent. Concurrent with modifying the shareholders’ agreement with Ma’aden, Alcoa entered into an agreement with Aluminum Financing Limited under which Alcoa redeemed the $40 in Notes, and Aluminum Financing Limited terminated all of its current and future interests in the SPV, for a payment of $60. This $60 was included in Acquisitions of noncontrolling interests on the accompanying Statement of Consolidated Cash Flows. The difference between the redemption amount and the carrying value of the Notes was reflected as a reduction in Additional capital on the accompanying Consolidated Balance Sheet. As a result of the changes in the ownership structure described above, Alcoa’s capital investment in the joint venture will be approximately $1,100 over a four-year period, and Alcoa will be responsible for its pro rata share of the joint venture’s project financing.

- Definition

Equity investment disclosure, or group of investments for which combined disclosure is appropriate, including: (a) the name of each investee and percentage of ownership of common stock, (b) accounting policies for investments in common stock, (c) difference between the amount at which the investment is carried and the amount of underlying equity in net assets and the accounting treatment of the difference, (d) the total fair value of each identified investment for which a market value is available, (e) summarized information as to assets, liabilities, and results of operations of the investees (for investments in unconsolidated subsidiaries, common stock of joint ventures, or other investments using the equity method), and (f) material effects of possible conversions, exercises, or contingent issuances of the investee. Other disclosures include (a) the names of any investee in which the investor owns 20 percent or more of the voting stock and investment is not accounted for using the equity method, and the reasons why not, and (b) the names of any investee in which the investor owns less than 20% of the voting stock and the investment is accounted for using the equity method, and the reasons why it is. This item also represents the entire disclosure related to Investments in Certain Debt and Equity Securities (and certain other trading assets) which include all debt and equity securities (other than those equity securities accounted for under the equity or cost methods of accounting) with readily determinable fair values. Other trading assets include assets that are carried on the balance sheet at fair value and held for trading purposes. A debt security represents a creditor relationship with an enterprise that is in the form of a security. Debt securities include, among other items, US Treasur y securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities (and other trading assets).

+ References + Details

Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Mar. 31, 2010
Statement [Line Items]
Commitments and Contingencies	H. Commitments and Contingencies *Litigation* On February 27, 2008, Alcoa Inc. received notice that Aluminium Bahrain B.S.C. (Alba) had filed suit against Alcoa Inc. and Alcoa World Alumina LLC (collectively, “Alcoa”), and others, in the U.S. District Court for the Western District of Pennsylvania (the “Court”), Civil Action number 08-299, styled Aluminium Bahrain B.S.C. v. Alcoa Inc., Alcoa World Alumina LLC, William Rice, and Victor Phillip Dahdaleh. The complaint alleges that certain Alcoa entities and their agents, including Victor Phillip Dahdaleh, have engaged in a conspiracy over a period of 15 years to defraud Alba. The complaint further alleges that Alcoa and its employees or agents (1) illegally bribed officials of the government of Bahrain and (or) officers of Alba in order to force Alba to purchase alumina at excessively high prices, (2) illegally bribed officials of the government of Bahrain and (or) officers of Alba and issued threats in order to pressure Alba to enter into an agreement by which Alcoa would purchase an equity interest in Alba, and (3) assigned portions of existing supply contracts between Alcoa and Alba for the sole purpose of facilitating alleged bribes and unlawful commissions. The complaint alleges that Alcoa and the other defendants violated the Racketeer Influenced and Corrupt Organizations Act (RICO) and committed fraud. Alba’s complaint seeks compensatory, consequential, exemplary, and punitive damages, rescission of the 2005 alumina supply contract, and attorneys’ fees and costs. Alba seeks treble damages with respect to its RICO claims. On February 26, 2008, Alcoa Inc. had advised the U.S. Department of Justice (DOJ) and the Securities and Exchange Commission (SEC) that it had recently become aware of these claims, had already begun an internal investigation, and intended to cooperate fully in any investigation that the DOJ or the SEC may commence. On March 17, 2008, the DOJ notified Alcoa that it had opened a formal investigation and Alcoa has been cooperating with the government. In response to a motion filed by the DOJ on March 27, 2008, the Court ordered the suit filed by Alba to be administratively closed and that all discovery be stayed to allow the DOJ to fully conduct an investigation without the interference and distraction of ongoing civil litigation. The Court further ordered that the case will be reopened at the close of the DOJ’s investigation. The Company is unable to reasonably predict an outcome or to estimate a range of reasonably possible loss. In November 2006, in Curtis v. Alcoa Inc., Civil Action No. 3:06cv448 (E.D. Tenn.), a class action was filed by plaintiffs representing approximately 13,000 retired former employees of Alcoa or Reynolds Metals Company and spouses and dependents of such retirees alleging violation of the Employee Retirement Income Security Act (ERISA) and the Labor-Management Relations Act by requiring plaintiffs, beginning January 1, 2007, to pay health insurance premiums and increased co-payments and co-insurance for certain medical procedures and prescription drugs. Plaintiffs allege these changes to their retiree health care plans violate their rights to vested health care benefits. Plaintiffs additionally allege that Alcoa has breached its fiduciary duty to plaintiffs under ERISA by misrepresenting to them that their health benefits would never change. Plaintiffs seek injunctive and declaratory relief, back payment of benefits, and attorneys’ fees. Alcoa has consented to treatment of plaintiffs’ claims as a class action. During the fourth quarter of 2007, following briefing and argument, the court ordered consolidation of the plaintiffs’ motion for preliminary injunction with trial, certified a plaintiff class, bifurcated and stayed the plaintiffs’ breach of fiduciary duty claims, struck the plaintiffs’ jury demand, but indicated it would use an advisory jury, and set a trial date of September 17, 2008. In August 2008, the court set a new trial date of March 24, 2009 and, subsequently, the trial date was moved to September 22, 2009. In June 2009, the court indicated that it would not use an advisory jury at trial. Trial in the matter was held over eight days commencing September 22, 2009 and ending on October 1, 2009 in federal court in Knoxville, TN before the Honorable Thomas Phillips, U.S. District Court Judge. At the conclusion of evidence, the court set a post-hearing briefing schedule for submission of proposed findings of fact and conclusions of law by the parties and for replies to the same. Post trial briefing was submitted on December 4, 2009. No schedule was set for handing down a decision. Alcoa believes that it presented substantial evidence in support of its defenses at trial. However, at this stage of the proceeding, the Company is unable to reasonably predict the outcome. Alcoa estimates that, in the event of an unfavorable outcome, the maximum exposure would be an additional postretirement benefit liability of approximately $300, some portion of which may be recognized over future periods. In addition to the litigation discussed above, various other lawsuits, claims, and proceedings have been or may be instituted or asserted against Alcoa, including those pertaining to environmental, product liability, and safety and health matters. While the amounts claimed may be substantial, the ultimate liability cannot now be determined because of the considerable uncertainties that exist. Therefore, it is possible that the Company’s financial position, liquidity, or results of operations in a particular period could be materially affected by certain contingencies. However, based on facts currently available, management believes that the disposition of matters that are pending or asserted will not have a material adverse effect, individually or in the aggregate, on the financial position, liquidity, or the results of operations of the Company. *European Commission Matters* In July 2006, the European Commission (EC) announced that it had opened an investigation to establish whether an extension of the regulated electricity tariff granted by Italy to some energy-intensive industries complies with European Union (EU) state aid rules. The Italian power tariff extended the tariff that was in force until December 31, 2005 through November 19, 2009 (Alcoa has been incurring higher power costs at its smelters in Italy subsequent to the tariff end date). The extension was originally through 2010, but the date was changed by legislation adopted by the Italian Parliament effective on August 15, 2009. Prior to expiration of the tariff in 2005, Alcoa had been operating in Italy for more than 10 years under a power supply structure approved by the EC in 1996. That measure provided a competitive power supply to the primary aluminum industry and was not considered state aid from the Italian Government. The EC’s announcement expressed concerns about whether Italy’s extension of the tariff beyond 2005 was compatible with EU legislation and potentially distorted competition in the European market of primary aluminum, where energy is an important part of the production costs. On November 19, 2009, the EC announced a decision in this matter stating that the extension of the tariff by Italy constituted unlawful state aid, in part, and, therefore, the Italian Government is to recover a portion of the benefit Alcoa received since January 2006 (including interest). The amount of this recovery will be based on a calculation that is being prepared by the Italian Government. Pending notification from the Italian Government, Alcoa estimates that a payment in the range of $300 to $500 will be required during 2010. In late 2009, after discussions with legal counsel and reviewing the bases on which the EC decided, including the different considerations cited in the EC decision regarding Alcoa’s two smelters in Italy, Alcoa recorded a charge of $250, including $20 to write-off a receivable from the Italian Government for amounts due under the now expired tariff structure. On April 19, 2010, Alcoa filed an appeal of this decision with the General Court of the EU. Alcoa will pursue all substantive and procedural legal steps available to annul the EC’s decision, including seeking injunctive relief to suspend the effectiveness of the decision. As a result of the EC’s decision, management had contemplated ceasing operations at its Italian smelters due to uneconomical power costs. In February 2010, management agreed to continue to operate its smelters in Italy for up to six months while a long-term solution to address increased power costs can be negotiated. These smelters are currently operating on short-term, market-based power contracts, under which Alcoa may stop receiving power at any time. In February 2010, the Italian Government issued a decree, which was converted into law by the Italian Parliament in March 2010, to provide interruptibility rights to certain industrial customers who were willing to be subject to temporary interruptions in the supply of power. Alcoa applied for and was granted such rights related to its Portovesme smelter. The EC is currently reviewing the validity of the decree to determine whether it qualifies as state aid. Alcoa already had interruptibility rights under existing Italian legislation, which are not currently subject to review by the EC, related to its Fusina smelter. Alcoa and the Italian Government are expected to meet in late April to evaluate the Fusina situation. Separately, on November 29, 2006, Alcoa filed an appeal before the European Court of First Instance seeking the annulment of the EC’s decision to open an investigation alleging that such decision did not follow the applicable procedural rules. On March 25, 2009, the European Court of First Instance denied Alcoa’s appeal. On June 4, 2009, Alcoa appealed the March 25, 2009 ruling; however, no decision on that appeal is expected until 2011 or later. In January 2007, the EC announced that it had opened an investigation to establish whether the regulated electricity tariffs granted by Spain comply with EU state aid rules. Alcoa has been operating in Spain for more than nine years under a power supply structure approved by the Spanish Government in 1986, an equivalent tariff having been granted in 1983. The investigation is limited to the year 2005 and is focused both on the energy-intensive consumers and the distribution companies. The investigation provided 30 days to any interested party to submit observations and comments to the EC. With respect to the energy-intensive consumers, the EC opened the investigation on the assumption that prices paid under the tariff in 2005 were lower than the pool price mechanism, therefore being, in principle, artificially below market conditions. Alcoa submitted comments in which the company provided evidence that prices paid by energy-intensive consumers were in line with the market, in addition to various legal arguments defending the legality of the Spanish tariff system. It is Alcoa’s understanding that the Spanish tariff system for electricity is in conformity with all applicable laws and regulations, and therefore no state aid is present in the tariff system. Alcoa believes that the total potential impact from an unfavorable decision would be approximately $11 pretax (€8). While Alcoa believes that any additional cost would only be assessed for the year 2005, it is possible that the EC could extend its investigation to later years. A decision by the EC is expected in 2010. If the EC’s investigation concludes that the regulated electricity tariffs for industries are unlawful, Alcoa will have an opportunity to challenge the decision in the EU courts. *Environmental Matters* Alcoa continues to participate in environmental assessments and cleanups at a number of locations. These include 30 owned or operating facilities and adjoining properties, 32 previously owned or operating facilities and adjoining properties, and 70 waste sites, including Superfund (Comprehensive Environmental Response, Compensation and Liability Act (CERCLA)) sites. A liability is recorded for environmental remediation when a cleanup program becomes probable and the costs or damages can be reasonably estimated. As assessments and cleanups proceed, the liability is adjusted based on progress made in determining the extent of remedial actions and related costs and damages. The liability can change substantially due to factors such as the nature and extent of contamination, changes in remedial requirements, and technological changes, among others. Alcoa’s remediation reserve balance was $333 and $307 at March 31, 2010 and December 31, 2009 (of which $28 and $27 was classified as a current liability), respectively, and reflects the most probable costs to remediate identified environmental conditions for which costs can be reasonably estimated. In the first quarter of 2010, the remediation reserve was increased by $33 due to a $17 reserve adjustment related to the Massena, NY site discussed below, $14 in reserve adjustments related to two U.S. smelters (see Note D), and $2 associated with various sites. The changes to the remediation reserve, except for the $14, were recorded in Cost of goods sold on the accompanying Statement of Consolidated Operations. Payments related to remediation expenses applied against the reserve were $7 in the 2010 first quarter. These amounts include expenditures currently mandated, as well as those not required by any regulatory authority or third party. Included in annual operating expenses are the recurring costs of managing hazardous substances and environmental programs. These costs are estimated to be approximately 2% of cost of goods sold. The following discussion provides details regarding the current status of certain significant reserves related to current or former Alcoa sites. It is possible that Alcoa’s financial position, liquidity, or results of operations, in a particular period, could be materially affected by matters relating to these sites. However, based on facts currently available, management believes that adequate reserves have been provided and that the disposition of these matters will not have a materially adverse effect on the financial position, liquidity, or the results of operations of the Company. Massena, NY—Alcoa has been conducting investigations and studies of the Grasse River, adjacent to Alcoa’s Massena plant site, under a 1989 order from the U.S. Environmental Protection Agency (EPA) issued under CERCLA. Sediments and fish in the river contain varying levels of polychlorinated biphenyls (PCBs). Alcoa submitted various Analysis of Alternatives Reports to the EPA starting in 1998 through 2002 that reported the results of river and sediment studies, potential alternatives for remedial actions related to the PCB contamination, and additional information requested by the EPA. In June 2003, the EPA requested that Alcoa gather additional field data to assess the potential for sediment erosion from winter river ice formation and breakup. The results of these additional studies, submitted in a report to the EPA in April 2004, suggest that this phenomenon has the potential to occur approximately every 10 years and may impact sediments in certain portions of the river under all remedial scenarios. The EPA informed Alcoa that a final remedial decision for the river could not be made without substantially more information, including river pilot studies on the effects of ice formation and breakup on each of the remedial techniques. Alcoa submitted to the EPA, and the EPA approved, a Remedial Options Pilot Study (ROPS) to gather this information. The scope of this study included sediment removal and capping, the installation of an ice control structure, and significant monitoring. From 2004 through 2008, Alcoa completed the work outlined in the ROPS. In November 2008, Alcoa submitted an update to the EPA incorporating the new information obtained from the ROPS related to the feasibility and costs associated with various capping and dredging alternatives, including options for ice control. As a result, Alcoa increased the reserve associated with the Grasse River by $40 for the estimated costs of a proposed ice control remedy and for partial settlement of potential damages of natural resources. In late 2009, the EPA requested that Alcoa submit a complete revised Analysis of Alternatives Report in March 2010 to address questions and comments from the EPA and various stakeholders. On March 24, 2010, Alcoa submitted the revised report, which included an expanded list of proposed remedial alternatives, as directed by the EPA. Alcoa increased the reserve associated with the Grasse River by $17 for an increase in the estimated costs of the recommended capping alternative as a result of changes in scope that occurred due to the questions and comments from the EPA and various stakeholders. While the EPA reviews the revised report throughout 2010, Alcoa will continue with its on-going monitoring and field studies activities. The ultimate selection of a remedy may result in additional liability. Alternatives analyzed in the most recent Analysis of Alternatives report that are equally effective as the recommended capping remedy range in additional estimated costs between $20 and $100. As such, Alcoa may be required to record a subsequent reserve adjustment at the time the EPA’s Record of Decision is issued, which is expected in 2011 or later. Sherwin, TX—In connection with the sale of the Sherwin alumina refinery, which was required to be divested as part of the Reynolds merger in 2000, Alcoa agreed to retain responsibility for the remediation of the then existing environmental conditions, as well as a pro rata share of the final closure of the active waste disposal areas, which remain in use. Alcoa’s share of the closure costs is proportional to the total period of operation of the active waste disposal areas. Alcoa estimated its liability for the active disposal areas by making certain assumptions about the period of operation, the amount of material placed in the area prior to closure, and the appropriate technology, engineering, and regulatory status applicable to final closure. The most probable cost for remediation was reserved. East St. Louis, IL—In response to questions regarding environmental conditions at the former East St. Louis operations, Alcoa and the City of East St. Louis, the owner of the site, entered into an administrative order with the EPA in December 2002 to perform a remedial investigation and feasibility study of an area used for the disposal of bauxite residue from historic alumina refining operations. A draft feasibility study was submitted to the EPA in April 2005. The feasibility study included remedial alternatives that ranged from no further action to significant grading, stabilization, and water management of the bauxite residue disposal areas. As a result, Alcoa increased the environmental reserve for this location by $15 in 2005. The EPA’s ultimate selection of a remedy could result in additional liability. Alcoa may be required to record a subsequent reserve adjustment at the time the EPA’s Record of Decision is issued, which is expected in 2010 or later. Vancouver, WA—In 1987, Alcoa sold its Vancouver smelter to a company that is now known as Evergreen Aluminum (Evergreen). The purchase and sale agreement contained a provision that Alcoa retain liability for any environmental issues that arise subsequent to the sale that pre-date 1987. As a result of this obligation, Alcoa recorded a reserve for the Vancouver location at that time. Evergreen decommissioned the smelter and cleaned up its portion of the site under a consent order with the Washington Department of Ecology (WDE). In February 2008, Evergreen notified Alcoa that it had identified numerous areas containing contamination that predated 1987. Separately, in September 2008, Alcoa completed a Remedial Investigation/Feasibility Study (RI/FS) under the Washington State Model Toxics Control Act and negotiated a consent decree with the WDE, which requires Alcoa to complete cleanup of PCB contaminated sediments in the Columbia River as well as remediate soil contamination in upland portions of the Vancouver property. In late 2008, Alcoa started cleanup work on the Columbia River and discovered additional contamination and waste materials along the shoreline area and in upland areas. In addition, Evergreen presented additional cost estimates for contaminated areas that were discovered since March 2008. As a result of all of the above items related to the former Vancouver site, Alcoa increased the environmental reserve by $16 in 2008. While continuing the cleanup work on the Columbia River in early 2009, Alcoa discovered more contamination and waste materials, resulting in a $2 increase to the environmental reserve. Later in 2009, cleanup work was completed related to the Evergreen property, the Columbia River, and the upland portions of the Vancouver property. Alcoa submitted a final report on this cleanup work to the WDE near the end of 2009 satisfying the remediation requirements of the consent decree. On March 17, 2010, Alcoa received a letter from the WDE stating that the work performed by Alcoa related to the Columbia River and the upland portions of the Vancouver property met all of the requirements of the consent decree, as well as the industrial cleanup standards under the Washington State Model Toxics Control Act. No additional reserve adjustment was necessary. Fusina and Portovesme, Italy—In 1996, Alcoa acquired the Fusina smelter and rolling operations and the Portovesme smelter, both of which are owned by Alcoa’s subsidiary Alcoa Trasformazioni S.r.l., from Alumix, an entity owned by the Italian Government. At the time of the acquisition, Alumix indemnified Alcoa for pre-existing environmental contamination at the sites. In 2004, the Italian Ministry of Environment (MOE) issued orders to Alcoa Trasformazioni S.r.l. and Alumix for the development of a clean-up plan related to soil contamination in excess of allowable limits under legislative decree and to institute emergency actions and pay natural resource damages. Alcoa Trasformazioni S.r.l. appealed the orders and filed suit against Alumix, among others, seeking indemnification for these liabilities under the provisions of the acquisition agreement. In 2009, Ligestra S.r.l., Alumix’s successor, and Alcoa Trasformazioni S.r.l. agreed to a stay on the court proceedings while investigations were conducted and negotiations advanced towards a possible settlement. In December 2009, Alcoa Trasformazioni S.r.l. and Ligestra S.r.l. reached an agreement for settlement of the liabilities related to Fusina while negotiations continue related to Portovesme. The agreement outlines an allocation of payments to the MOE for emergency action and natural resource damages and the scope and costs for a proposed soil remediation project, which is expected to be formally presented to the MOE in 2010. The agreement is contingent upon final acceptance of the remediation project by the MOE. As a result of entering into this agreement, Alcoa increased the reserve by $12 for Fusina. Additionally, due to new information derived from the site investigations conducted at Portovesme in 2009, Alcoa increased the reserve by $3. *Investments* Alumínio is a participant in several hydroelectric power construction projects in Brazil for purposes of increasing its energy self-sufficiency and providing a long-term, low-cost source of power for its facilities. Two of these projects, Machadinho and Barra Grande, were completed in 2002 and 2006, respectively. Alumínio committed to taking a share of the output of the Machadinho and Barra Grande projects each for 30 years at cost (including cost of financing the project). In the event that other participants in either one of these projects fail to fulfill their financial responsibilities, Alumínio may be required to fund a portion of the deficiency. In accordance with the respective agreements, if Alumínio funds any such deficiency, its participation and share of the output from the respective project will increase proportionately. With Machadinho and Barra Grande, Alumínio’s current power self-sufficiency is approximately 40% (will be approximately 70% once the hydroelectric power projects described below are completed and operating at full capacity), to meet a total energy demand of approximately 690 megawatts from Brazilian primary plants. Alumínio accounts for the Machadinho and Barra Grande hydroelectric projects as equity method investments. Alumínio’s investment participation in these projects is 30.99% for Machadinho and 42.18% for Barra Grande. Its total investment in these projects was $258 (R$462) and $264 (R$460) at March 31, 2010 and December 31, 2009, respectively. Alcoa’s maximum exposure to loss on these completed projects is approximately $510 (R$910), which represents Alumínio’s investment and guarantees of debt as of March 31, 2010. In early 2006, Alumínio acquired an additional 6.41% share in the Estreito hydroelectric power project, reaching 25.49% of total participation in the consortium. This additional share entitles Alumínio to 38 megawatts of assured energy. Alumínio’s share of the project is estimated to have installed capacity of approximately 280 megawatts and assured power of approximately 150 megawatts. In December 2006, the consortium obtained the environmental installation license, after completion of certain socioeconomic and cultural impact studies as required by a governmental agency. Construction began in early 2007 and is expected to be completed in 2011. In the first quarter of 2010, the consortium approved an increase of approximately $720 (R$1,300) in estimated costs to complete the Estreito project as a result of currency, inflation, and the price and scope of construction, among other factors. Total estimated project costs are approximately $2,700 (R$4,900) and Alumínio’s share is approximately $700 (R$1,250). As of March 31, 2010, Alumínio has contributed approximately $480 (R$860) towards the $700 commitment. In early 2007, construction began on the Serra do Facão hydroelectric power project. Construction of this facility is expected to be completed in 2010. The implementation of construction activities had been temporarily suspended in 2004 due to the temporary suspension of the project’s installation permit by legal injunction issued by the Brazilian Judicial Department (Public Ministry). Since 2004, this project was placed on hold due to unattractive market conditions. In mid-2006, market conditions became favorable and Alumínio proceeded with plans to begin construction. In September 2006, the national environmental agency renewed the installation permit allowing construction to commence. Alumínio’s share of the Serra do Facão project is 34.97% and entitles Alumínio to approximately 65 megawatts of assured power. Total estimated project costs are approximately $560 (R$1,000) and Alumínio’s share is approximately $200 (R$350). Through March 31, 2009, Alumínio contributed approximately $120 (R$220) towards the $200 commitment. In April 2009, the consortium obtained long-term financing for the remaining costs of construction. As a result, the participants in this project will no longer be required to provide capital for their share of the project costs. Instead, the participants were each required to guarantee (expires 2027) a portion of the consortium’s debt. Additionally, in May 2009, the consortium returned a portion of previous capital contributions to the participants, of which Alumínio received $53 (R$110). Alumínio accounts for the Serra do Facão hydroelectric power project as an equity method investment and its total investment in this project was $90 (R$161) and $89 (R$156) at March 31, 2010 and December 31, 2009, respectively. Alcoa’s maximum exposure to loss on this project is approximately $210 (R$380), which represents Alumínio’s investment and guarantee of debt as of March 31, 2010. In 2004, Alcoa acquired a 20% interest in a consortium, which subsequently purchased the Dampier to Bunbury Natural Gas Pipeline (DBNGP) in Western Australia, in exchange for an initial cash investment of $17 (A$24). The investment in the DBNGP was made in order to secure a competitively priced long-term supply of natural gas to Alcoa’s refineries in Western Australia. This investment was classified as an equity investment. Alcoa has made additional contributions of $120 (A$155), including $4 (A$4) in the 2010 first quarter, and committed to invest an additional $25 (A$28) to be paid as the pipeline expands through 2011. In addition to its equity ownership, Alcoa has an agreement to purchase gas transmission services from the DBNGP. Alcoa’s maximum exposure to loss on the investment and the related contract is approximately $430 (A$470) as of March 31, 2010.

Other Expenses, Net

3 Months Ended

Mar. 31, 2010

Statement [Line Items]

Other Expenses, Net

I. Other Expenses, Net


	First quarter ended March 31,
	2010			2009
Equity (income) loss	$	(3	)	$	23
Interest income		(4	)		(1	)
Foreign currency (gains) losses, net		(6	)		14
Net gain from asset sales		(2	)		(27	)
Other, net		36			21

	$	21		$	30

Segment Information

3 Months Ended

Mar. 31, 2010

Statement [Line Items]

Segment Information

J. Segment Information – The operating results of Alcoa’s reportable segments were as follows (differences between segment totals and consolidated totals are in Corporate):


First quarter ended March 31, 2010	Alumina			Primary Metals			Flat- Rolled Products			Engineered Products and Solutions		Total

Sales:
Third-party sales	$	638		$	1,702		$	1,435		$	1,074	$	4,849
Intersegment sales		591			623			46			—		1,260

Total sales	$	1,229		$	2,325		$	1,481		$	1,074	$	6,109

Profit and loss:
Equity income	$	2		$	—		$	—		$	1	$	3
Depreciation, depletion, and amortization		92			147			59			41		339
Income taxes		27			18			18			31		94
After-tax operating income (ATOI)		72			123			30			81		306


First quarter ended March 31, 2009

Sales:
Third-party sales	$	430		$	844		$	1,510		$	1,270	$	4,054
Intersegment sales		384			393			26			—		803

Total sales	$	814		$	1,237		$	1,536		$	1,270	$	4,857

Profit and loss:
Equity income (loss)	$	2		$	(30	)	$	—		$	—	$	(28	)
Depreciation, depletion, and amortization		55			122			52			40		269
Income taxes		(1	)		(147	)		—			46		(102	)
ATOI		35			(212	)		(61	)		95		(143	)

The following table reconciles total segment ATOI to consolidated net loss attributable to Alcoa:


	First quarter ended March 31,
	2010			2009
Total segment ATOI	$	306		$	(143	)
Unallocated amounts (net of tax):
Impact of LIFO		(14	)		29
Interest income		3			1
Interest expense		(77	)		(74	)
Noncontrolling interests		(22	)		(10	)
Corporate expense		(67	)		(71	)
Restructuring and other charges		(122	)		(46	)
Discontinued operations		(7	)		(17	)
Other		(201	)		(166	)

Consolidated net loss attributable to Alcoa	$	(201	)	$	(497	)

Items required to reconcile segment ATOI to consolidated net loss attributable to Alcoa include: the impact of LIFO inventory accounting; interest income and expense; noncontrolling interests; corporate expense (general administrative and selling expenses of operating the corporate headquarters and other global administrative facilities, along with depreciation and amortization on corporate-owned assets); restructuring and other charges; discontinued operations; and other items, including intersegment profit eliminations and other metal adjustments, differences between tax rates applicable to the segments and the consolidated effective tax rate, the results of the soft alloy extrusions business in Brazil, and other nonoperating items such as foreign currency translation gains/losses.

Preferred and Common Stock	3 Months Ended
Preferred and Common Stock	Mar. 31, 2010
Statement [Line Items]
Preferred and Common Stock	K. Preferred and Common Stock – On January 26, 2010, Alcoa contributed 44,313,146 newly issued shares of its common stock to a master trust that holds the assets of certain U.S. defined benefit pension plans in a private placement transaction. These shares were valued at $13.54 per share (the closing price of Alcoa’s common stock on January 26, 2010), or $600 in the aggregate, and were issued to satisfy a portion of Alcoa’s future funding obligations to these plans, including a portion of the estimated minimum required funding for 2011. On January 27, 2010, the 44,313,146 shares were registered under Alcoa’s current shelf registration statement dated March 10, 2008 for resale by the master trust, as selling stockholder. Alcoa is authorized to issue up to 1.8 billion shares of common stock. As of March 31, 2010, there were 1,141,387,684 common shares issued and 1,020,819,182 common shares outstanding.

- Definition

Disclosures related to accounts comprising shareholders' equity, including other comprehensive income. Includes: (1) balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings; (2) accumulated balance for each classification of other comprehensive income and total amount of comprehensive income; (3) amount and nature of changes in separate accounts, including the number of shares authorized and outstanding, number of shares issued upon exercise and conversion, and for other comprehensive income, the adjustments for reclassifications to net income; (4) rights and privileges of each class of stock authorized; (5) basis of treasury stock, if other than cost, and amounts paid and accounting treatment for treasury stock purchased significantly in excess of market; (6) dividends paid or payable per share and in the aggregate for each class of stock for each period presented; (7) dividend restrictions and accumulated preferred dividends in arrears (in aggregate and per share amount); (8) retained earnings appropriations or restrictions, such as dividend restrictions; (9) impact of change in accounting principle, initial adoption of new accounting principle and correction of an error in previously issued financial statements; (10) shares held in trust for Employee Stock Ownership Plan (ESOP); (11) deferred compensation related to issuance of capital stock; (12) note received for issuance of stock; (13) unamortized discount on shares; (14) description, terms and number of warrants or rights outstanding; (15) shares under subscription and subscription receivables; effective date of new retained earnings after quasi-reorganization and deficit eliminated by quasi-reorganization and, for a period of at least ten years after the effective date, the point in time from which the new retained dates; and (16) retroactive effective of subsequent change in capital structure. This item also represents the entire disclosure of compensation-related costs for share-based compensation which may include disclosure of policies, compensation plan details, allocation of stock compensation, incentive distributions, share-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References + Details

Earnings Per Share

3 Months Ended

Mar. 31, 2010

Statement [Line Items]

Earnings Per Share

L. Earnings Per Share – Basic earnings per share (EPS) amounts are computed by dividing earnings, after the deduction of preferred stock dividends declared and dividends and undistributed earnings allocated to participating securities, by the average number of common shares outstanding. Diluted EPS amounts assume the issuance of common stock for all potentially dilutive share equivalents outstanding not classified as participating securities.

The information used to compute basic and diluted EPS on loss from continuing operations attributable to Alcoa common shareholders was as follows (shares in millions):


	First quarter ended March 31,
	2010			2009
Loss from continuing operations attributable to Alcoa common shareholders	$	(194	)	$	(480	)
Less: preferred stock dividends declared		1			1

Loss from continuing operations available to common equity		(195	)		(481	)
Less: dividends and undistributed earnings allocated to participating securities		—			—

Loss from continuing operations available to Alcoa common shareholders	$	(195	)	$	(481	)

Average shares outstanding – basic		1,007			817
Effect of dilutive securities:
Stock options		—			—
Stock and performance awards		—			—
Convertible notes		—			—

Average shares outstanding – diluted		1,007			817

Participating securities are defined as unvested share-based payment awards that contain nonforfeitable rights to dividends or dividend equivalents (whether paid or unpaid) and are included in the computation of earnings per share pursuant to the two-class method. Prior to January 1, 2010, certain employees were granted stock and performance awards, which entitle those employees to receive nonforfeitable dividends during the vesting period on a basis equivalent to the dividends paid to holders of Alcoa’s common stock. As such, these unvested stock and performance awards met the definition of a participating security. Under the two-class method, all earnings, whether distributed or undistributed, are allocated to each class of common stock and participating securities based on their respective rights to receive dividends. At March 31, 2010 and 2009, there were 5 million and 7 million such participating securities outstanding. However, none of the loss from continuing operations in either period was allocated to these participating securities because these awards do not share in any loss generated by Alcoa.

Effective January 1, 2010, new grants of stock and performance awards do not contain a nonforfeitable right to dividends during the vesting period. As a result, an employee will forfeit the right to dividends accrued on unvested awards if that person does not fulfill their service requirement during the vesting period. As such, these awards are not treated as participating securities in the EPS calculation as the employees no longer have equivalent dividend rights as common shareholders. These awards are included in the EPS calculation utilizing the treasury stock method similar to stock options. At March 31, 2010, there were 3 million such awards outstanding.

In the first quarter of 2010 and 2009, basic average shares outstanding and diluted average shares outstanding were the same because the effect of potential shares of common stock was anti-dilutive since Alcoa generated a loss from continuing operations. As a result, 89 million share equivalents related to convertible notes were not included in the computation of diluted EPS in either period. Additionally, 34 million stock options and 3 million stock and performance awards were not included in the computation of diluted EPS in the first quarter of 2010. Had Alcoa generated sufficient income from continuing operations, 89 million and 7 million potential shares of common stock related to the convertible notes and stock options, respectively, in the 2010 first quarter and, 8 million potential shares of common stock related to the convertible notes in the 2009 first quarter would have been included in diluted average shares outstanding.

Options to purchase 24 million and 68 million shares of common stock at a weighted average exercise price of $32.70 and $24.67 per share were outstanding as of March 31, 2010 and 2009, respectively, but were not included in the computation of diluted EPS because they were anti-dilutive, as the exercise prices of the options were greater than the average market price of Alcoa’s common stock.

Income Taxes	3 Months Ended
Income Taxes	Mar. 31, 2010
Statement [Line Items]
Income Taxes	M. Income Taxes – The effective tax rate for the first quarter of 2010 and 2009 was 95.5% (provision on a loss) and 39.5% (benefit on a loss), respectively. The rate for the 2010 first quarter differs by 130.5% from the U.S. federal statutory rate of 35% primarily due to a $79 discrete income tax charge as a result of a change in the tax treatment of federal subsidies received related to prescription drug benefits provided under certain retiree health care benefit plans that were determined to be actuarially equivalent to Medicare Part D (see Note O), a $22 impact for operational losses in certain foreign jurisdictions that are excluded from the estimated annual effective tax rate calculation (impact is expected to reverse by the end of 2010), and $11 in discrete income tax charges for interest paid to the Internal Revenue Service on a previously deferred gain associated with the 2007 formation of the former soft alloy extrusions joint venture and a change in the anticipated structure of the potential sale of the Transportation Products Europe business. The rate for the 2009 first quarter differs from the U.S. federal statutory rate of 35% primarily due to a $28 discrete income tax benefit related to a Canadian tax law change allowing a tax return to be filed in U.S dollars, an $11 discrete income tax benefit related to the Elkem/Sapa AB exchange transaction, and a $15 impact for operational losses that are excluded from the estimated annual effective tax rate calculation.

Accounts Receivable Securitizations	3 Months Ended
Accounts Receivable Securitizations	Mar. 31, 2010
Statement [Line Items]
Accounts Receivable Securitizations	N. Accounts Receivable Securitizations – On March 26, 2010, Alcoa terminated its accounts receivable securitization program, under which Alcoa sold a senior undivided interest in certain customer receivables, without recourse, on a continuous basis to a third-party for cash. Alcoa repaid the $250 upon termination. In light of the adoption of accounting changes related to the transfer of financial assets, had the securitization program not been terminated, it would have resulted in a $250 increase in both Receivables from customers and Short-term borrowings on the accompanying Consolidated Balance Sheet (see Note B). Also on March 26, 2010, Alcoa entered into two arrangements with third parties to sell certain customer receivables outright without recourse. Under these agreements, $177 of receivables were sold for cash in March 2010. Alcoa is servicing the customer receivables for the third parties at market rates; therefore, no servicing asset or liability was recorded.

Pension Plans and Other Postretirement Benefits

3 Months Ended

Mar. 31, 2010

Statement [Line Items]

Pension Plans and Other Postretirement Benefits

O. Pension Plans and Other Postretirement Benefits – The components of net periodic benefit cost were as follows:


	Pension benefits						Postretirement benefits
First quarter ended March 31,	2010			2009			2010			2009
Service cost	$	37		$	35		$	5		$	5
Interest cost		170			167			44			46
Expected return on plan assets		(196	)		(191	)		(2	)		(3	)
Amortization of prior service cost (benefit)		4			4			(4	)		(3	)
Recognized actuarial loss		44			28			8			11

Net periodic benefit cost	$	59		$	43		$	51		$	56

On January 26, 2010, Alcoa contributed newly issued shares (see Note K) of its common stock (valued at $600) to a master trust that holds the assets of certain U.S. defined benefit pension plans in a private placement transaction. These shares were issued to satisfy a portion of Alcoa’s future funding obligations to these plans, including a portion of the estimated minimum required funding for 2011.

On March 23, 2010, the Patient Protection and Affordable Care Act (the “PPACA”) was signed into law, and, on March 30, 2010, the Health Care and Education Reconciliation Act of 2010 (the “HCERA” and, together with PPACA, the “Acts”), which makes various amendments to certain aspects of the PPACA, was signed into law. The Acts effectively change the tax treatment of federal subsidies paid to sponsors of retiree health benefit plans that provide prescription drug benefits that are at least actuarially equivalent to the corresponding benefits provided under Medicare Part D.

The federal subsidy paid to employers was introduced as part of the Medicare Prescription Drug, Improvement, and Modernization Act of 2003 (the “MPDIMA”). Alcoa has been receiving the federal subsidy since the 2006 tax year related to certain retiree prescription drug plans that were determined to be actuarially equivalent to the benefit provided under Medicare Part D. Under the MPDIMA, the federal subsidy does not reduce an employer’s income tax deduction for the costs of providing such prescription drug plans nor is it subject to income tax individually.

Under the Acts, beginning in 2013, an employer’s income tax deduction for the costs of providing Medicare Part D-equivalent prescription drug benefits to retirees will be reduced by the amount of the federal subsidy. Under GAAP, any impact from a change in tax law must be recognized in earnings in the period enacted regardless of the effective date. As a result, Alcoa recognized a noncash charge of $79 in the first quarter ended March 31, 2010 for the elimination of a related deferred tax asset to reflect the change in the tax treatment of the federal subsidy (see Note M).

Derivatives and Other Financial Instruments

3 Months Ended

Mar. 31, 2010

Statement [Line Items]

Derivatives and Other Financial Instruments

P. Derivatives and Other Financial Instruments

Derivatives

Alcoa is exposed to certain risks relating to its ongoing business operations, including financial, market, political, and economic risks. The following discussion provides information regarding Alcoa’s exposure to the risks of changing commodity prices, interest rates, and foreign currency exchange rates.

Alcoa’s commodity and derivative activities are subject to the management, direction, and control of the Strategic Risk Management Committee (SRMC). The SRMC is composed of the chief executive officer, the chief financial officer, and other officers and employees that the chief executive officer selects. The SRMC reports to the Board of Directors on the scope of its activities.

The aluminum, energy, interest rate, and foreign exchange contracts are held for purposes other than trading. They are used primarily to mitigate uncertainty and volatility, and to cover underlying exposures. Alcoa is not involved in trading activities for energy, weather derivatives, or other nonexchange commodity trading activities.

The fair values of outstanding derivative contracts recorded as assets in the accompanying Consolidated Balance Sheet were as follows:


Asset Derivatives	Balance Sheet Location	March 31, 2010		December 31, 2009
Derivatives designated as hedging instruments:
Aluminum contracts	Prepaid expenses and other current assets	$	46	$	59
Interest rate contracts	Prepaid expenses and other current assets		38		34
Foreign exchange contracts	Prepaid expenses and other current assets		5		7
Energy contracts	Prepaid expenses and other current assets		—		7
Aluminum contracts	Other noncurrent assets		28		22
Interest rate contracts	Other noncurrent assets		73		73
Foreign exchange contracts	Other noncurrent assets		3		5
Energy contracts	Other noncurrent assets		1		—

Total derivatives designated as hedging instruments		$	194	$	207


Derivatives not designated as hedging instruments*:
Aluminum contracts	Prepaid expenses and other current assets	$	4	$	6
Energy contracts	Prepaid expenses and other current assets		—		1
Freight contracts	Prepaid expenses and other current assets		1		—
Aluminum contracts	Other noncurrent assets		1		3

Total derivatives not designated as hedging instruments		$	6	$	10


Less margin held:
Interest rate contracts	Prepaid expenses and other current assets	$	13	$	19
Aluminum contracts	Prepaid expenses and other current assets		16		22
Energy contracts	Prepaid expenses and other current assets		—		1
Interest rate contracts	Other noncurrent assets		11		18

Sub-total		$	40	$	60


Total Asset Derivatives		$	160	$	157

*	See the “Other” section within Note P for additional information on Alcoa’s purpose for entering into derivatives not designated as hedging instruments and its overall risk management strategies.

The fair value of outstanding derivative contracts recorded as liabilities in the accompanying Consolidated Balance Sheet were as follows:


Liability Derivatives	Balance Sheet Location	March 31, 2010		December 31, 2009
Derivatives designated as hedging instruments:
Aluminum contracts	Other current liabilities	$	97	$	67
Energy contracts	Other current liabilities		14		—
Foreign exchange contracts	Other current liabilities		8		4
Aluminum contracts	Other noncurrent liabilities and deferred credits		745		734

Total derivatives designated as hedging instruments		$	864	$	805


Derivatives not designated as hedging instruments*:
Aluminum contracts	Other current liabilities	$	47	$	42
Energy contracts	Other current liabilities		56		37
Aluminum contracts	Other noncurrent liabilities and deferred credits		41		36
Energy contracts	Other noncurrent liabilities and deferred credits		31		24
Foreign exchange contracts	Other noncurrent liabilities and deferred credits		—		1
Embedded credit derivative	Other noncurrent liabilities and deferred credits		28		22

Total derivatives not designated as hedging instruments		$	203	$	162


Less margin posted:
Aluminum contracts	Other current liabilities	$	5	$	4
Energy contracts	Other current liabilities		29		18
Aluminum contracts	Other noncurrent liabilities and deferred credits		2		3
Energy contracts	Other noncurrent liabilities and deferred credits		21		12

Sub-total		$	57	$	37

Total Liability Derivatives		$	1,010	$	930

*	See the “Other” section within Note P for additional information on Alcoa’s purpose for entering into derivatives not designated as hedging instruments and its overall risk management strategies.

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The fair value hierarchy distinguishes between (1) market participant assumptions developed based on market data obtained from independent sources (observable inputs) and (2) an entity’s own assumptions about market participant assumptions developed based on the best information available in the circumstances (unobservable inputs). The fair value hierarchy consists of three broad levels, which gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). The three levels of the fair value hierarchy are described below:

•

Level 1 - Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities.

•

Level 2 - Inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly, including quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in markets that are not active; inputs other than quoted prices that are observable for the asset or liability (e.g., interest rates); and inputs that are derived principally from or corroborated by observable market data by correlation or other means.

•

Level 3 - Inputs that are both significant to the fair value measurement and unobservable.

The following section describes the valuation methodologies used by Alcoa to measure derivative contracts at fair value, including an indication of the level in the fair value hierarchy in which each instrument is generally classified. Where appropriate, the description includes details of the valuation models, the key inputs to those models, and any significant assumptions.

Derivative contracts are valued using quoted market prices and significant other observable and unobservable inputs. Such financial instruments consist of aluminum, energy, interest rate, and foreign exchange contracts. The fair values for the majority of these derivative contracts are based upon current quoted market prices. These financial instruments are typically exchange-traded and are generally classified within Level 1 or Level 2 of the fair value hierarchy depending on whether the exchange is deemed to be an active market or not.

For certain derivative contracts whose fair values are based upon trades in liquid markets, such as interest rate swaps, valuation model inputs can generally be verified and valuation techniques do not involve significant management judgment. The fair values of such financial instruments are generally classified within Level 2 of the fair value hierarchy.

Alcoa has other derivative contracts that do not have observable market quotes. For these financial instruments, management uses significant other observable inputs (e.g., information concerning time premiums and volatilities for certain option type embedded derivatives and regional premiums for aluminum contracts). For periods beyond the term of quoted market prices for aluminum, Alcoa uses a model that estimates the long-term price of aluminum based on anticipated changes in worldwide supply and demand. For periods beyond the term of quoted market prices for energy, management has developed a forward curve based on independent consultant market research. Where appropriate, valuations are adjusted for various factors such as liquidity, bid/offer spreads, and credit considerations. Such adjustments are generally based on available market evidence (Level 2). In the absence of such evidence, management’s best estimate is used (Level 3).

The following table presents Alcoa’s derivative contract assets and liabilities that are measured and recognized at fair value on a recurring basis classified under the appropriate level of the fair value hierarchy:


	March 31, 2010			December 31, 2009
Assets:
Level 1	$	88		$	110
Level 2		111			107
Level 3		1			—
Margin held*		(40	)		(60	)

Total	$	160		$	157


Liabilities:
Level 1	$	89		$	61
Level 2		85			75
Level 3		893			831
Margin posted*		(57	)		(37	)

Total	$	1,010		$	930

Margin held represents cash collateral received related to aluminum contracts included in Level 1 and interest rate contracts included in Level 2 and margin posted represents cash collateral paid related to aluminum contracts included in Level 1 and energy contracts included in Level 3. At December 31, 2009, margin held also represents cash collateral received related to energy contracts included in Level 1. Alcoa elected to net the margin held and posted against the fair value amounts recognized for derivative instruments executed with the same counterparties under master netting arrangements.

Financial instruments classified as Level 3 in the fair value hierarchy represent derivative contracts in which management has used at least one significant unobservable input in the valuation model. The following table presents a reconciliation of activity for such derivative contracts on a net basis:


	First quarter ended March 31, 2010
Balance at beginning of period	$	831
Total gains or losses (realized and unrealized) included in:
Sales		(8	)
Cost of goods sold		(11	)
Other expenses, net		45
Other comprehensive loss		35
Purchases, sales, issuances, and settlements		—
Transfers in and (or) out of Level 3*		—

Balance at end of period	$	892


Total (losses) or gains included in earnings attributable to the change in unrealized gains or losses relating to derivative contracts still held at March 31, 2010:
Sales	$	—
Cost of goods sold		—
Other expenses, net		25

*	There were no transfers in or out of Level 3 for the first quarter ended March 31, 2010.

As reflected in the table above, the net unrealized loss on derivative contracts using Level 3 valuation techniques was $892 as of March 31, 2010. This loss is mainly attributed to embedded derivatives in power contracts that index the price of power to the London Metal Exchange (LME) price of aluminum. These embedded derivatives are primarily valued using observable market prices. However, due to the length of the contracts, the valuation model also requires management to estimate the long-term price of aluminum based upon anticipated changes in worldwide supply and demand. The embedded derivatives have been designated as hedges of forward sales of aluminum and their realized gains and losses were included in Sales on the accompanying Statement of Consolidated Operations.

Also, included within Level 3 measurements are derivative financial instruments that hedge the cost of electricity. Transactions involving on-peak power are observable as there is an active market. However, there are certain off-peak times when there is not an actively traded market for electricity. Therefore, management utilizes market prices, historical relationships, and various forecast services to determine the fair value.

Management utilizes these same valuation techniques for an existing power contract associated with a smelter in the U.S. that no longer qualified for the normal purchase normal sale exception under derivative accounting in late 2009. Unrealized gains and losses for this physical power contract were included in Other expenses, net on the accompanying Statement of Consolidated Operations, while realized gains and losses were included in Cost of goods sold on the accompanying Statement of Consolidated Operations. Additionally, a financial contract related to the same U.S. smelter utilized by management to hedge the price of electricity of the aforementioned power contract no longer qualified for cash flow hedge accounting near the end of 2009. Realized gains and losses of this financial contract were included in Cost of goods sold on the accompanying Statement of Consolidated Operations. In periods prior to January 1, 2010, unrealized gains and losses were included in Other comprehensive income; in periods subsequent to December 31, 2009, such changes were included in Other expenses, net on the accompanying Statement of Consolidated Operations.

In the 2010 first quarter, Alcoa entered into a contract to hedge the anticipated power requirements at two smelters in Australia. These derivatives hedge forecasted power purchases through December 2036. Beyond the term where market information is available, management has developed a forward curve, for valuation purposes, based on independent consultant market research. The effective portion of gains and losses on these contracts will be recorded in Other comprehensive income until the designated hedge periods begin in 2014 and 2016. Once the hedge periods begin, realized gains and losses will be recorded in Cost of goods sold.

Additionally, an embedded derivative in a power contract that indexes the difference between the long-term debt ratings of Alcoa and the counterparty from any of the three major credit rating agencies is included in Level 3. Management uses market prices, historical relationships, and forecast services to determine fair value. Realized gains and losses for this embedded derivative were included in Other expenses, net on the accompanying Statement of Consolidated Operations.

Fair Value Hedges

For derivative instruments that are designated and qualify as fair value hedges, the gain or loss on the derivative as well as the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in current earnings. Alcoa includes the gain or loss on the hedged items in the same line items as the offsetting loss or gain on the related derivative contracts as follows (there were no contracts that ceased to qualify as a fair value hedge in the 2010 and 2009 first quarters):


Derivatives in Fair Value Hedging Relationships	Location of Gain or (Loss) Recognized in Income on Derivatives	Amount of Gain or (Loss) Recognized in Income on Derivatives
			First quarter ended March 31,
			2010		2009
Aluminum contracts	Sales		$	19	$	(141	)
Interest rate contracts	Interest expense			18		11

Total			$	37	$	(130	)

Aluminum. Alcoa is a leading global producer of primary aluminum and fabricated aluminum products. As a condition of sale, customers often require Alcoa to enter into long-term, fixed-price commitments. These commitments expose Alcoa to the risk of fluctuating aluminum prices between the time the order is committed and the time that the order is shipped. Alcoa’s aluminum commodity risk management policy is to manage, principally through the use of futures contracts, the aluminum price risk associated with a portion of its firm commitments. These contracts cover known exposures, generally within three years. As of March 31, 2010, Alcoa had 375 kmt of aluminum futures designated as fair value hedges. The effects of this hedging activity will be recognized over the designated hedge periods in 2010 to 2012.

Interest Rates. Alcoa uses interest rate swaps to help maintain a strategic balance between fixed- and floating-rate debt and to manage overall financing costs. As of March 31, 2010, the Company had pay floating, receive fixed interest rate swaps that were designated as fair value hedges. These hedges effectively convert the interest rate from fixed to floating on $1,890 of debt through 2018.

Cash Flow Hedges

For derivative instruments that are designated and qualify as cash flow hedges, the effective portion of the gain or loss on the derivative is reported as a component of other comprehensive income (OCI) and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. Gains and losses on the derivative representing either hedge ineffectiveness or hedge components excluded from the assessment of effectiveness are recognized in current earnings.


Derivatives in Cash Flow Hedging Relationships	Amount of Gain or (Loss) Recognized in OCI on Derivatives (Effective Portion)							Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)*							Location of Gain or (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)	Amount of Gain or (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)**
		First quarter ended March 31,								First quarter ended March 31,								First quarter ended March 31,
		2010			2009					2010			2009					2010		2009
Aluminum contracts		$	(57	)	$	114		Sales		$	(11	)	$	14		Other expenses, net		$	2	$	2
Aluminum contracts			—			12		Other expenses, net			—			47		Other expenses, net			—		—
Energy contracts			(10	)		(26	)	Cost of goods sold			(4	)		(7	)	Other expenses, net			—		—
Energy contracts			(1	)		—		Other expenses, net			—			—		Other expenses, net			—		—
Foreign exchange contracts			(6	)		—		Sales			(3	)		—		Other expenses, net			—		—

Total		$	(74	)	$	100				$	(18	)	$	54				$	2	$	2

*	Assuming market rates remain constant with the rates at March 31, 2010, a loss of $132 is expected to be recognized in earnings over the next 12 months.

**	For the first quarter ended March 31, 2010 and 2009, the amount of gain or (loss) recognized in income related to the ineffective portion of the hedging relationships.

Aluminum and Energy. Alcoa anticipates the continued requirement to purchase aluminum and other commodities, such as electricity, natural gas, and fuel oil, for its operations. Alcoa enters into futures and forward contracts to reduce volatility in the price of these commodities. Alcoa has also entered into power supply and other contracts that contain pricing provisions related to the LME aluminum price. The LME-linked pricing features are considered embedded derivatives. A majority of these embedded derivatives have been designated as cash flow hedges of future sales of aluminum.

Foreign Exchange. Alcoa is subject to exposure from fluctuations in foreign currency exchange rates. These contracts may be used from time to time to hedge the variability in cash flows from the forecasted payment or receipt of currencies other than the functional currency. These contracts cover periods consistent with known or expected exposures through 2011.

Alcoa had the following outstanding forward contracts that were entered into to hedge forecasted transactions:


	March 31, 2010		December 31, 2009
Aluminum contracts (kmt)		1,736		1,917
Energy contracts:
Electricity (megawatt hours)		100,578,295		—
Natural gas (million British thermal units)		10,170,000		13,560,000
Fuel oil (metric tons)		232,037		307,143
Foreign exchange contracts	$	125	$	158

Other

Alcoa has also entered into certain derivatives to minimize its price risk related to other customer sales and pricing arrangements. Alcoa has not qualified these contracts for hedge accounting treatment and, therefore, the fair value gains and losses on these contracts are recorded in earnings as follows:


Derivatives Not Designated as Hedging Instruments	Location of Gain or (Loss) Recognized in Income on Derivatives	Amount of Gain or (Loss) Recognized in Income on Derivatives
			First quarter ended March 31,
			2010			2009
Aluminum contracts	Sales		$	1		$	(12	)
Aluminum contracts	Other expenses, net			(8	)		11
Embedded credit derivative	Other expenses, net			(6	)		(21	)
Energy contracts	Other expenses, net			(33	)		—
Foreign exchange contracts	Other expenses, net			3			2

Total			$	(43	)	$	(20	)

The embedded credit derivative relates to a power contract that indexes the difference between the long-term debt ratings of Alcoa and the counterparty from any of the three major credit rating agencies. If Alcoa’s credit ratings were downgraded at any time, an independent investment banker would be consulted to determine a hypothetical interest rate for both parties. The two interest rates would be netted and the resulting difference would be multiplied by Alcoa’s equivalent percentage of the outstanding principal of the counterparty’s debt obligation as of December 31st of the year preceding the calculation date. This differential would be added to the cost of power in the period following the calculation date.

The energy contracts are associated with a smelter in the U.S. and include a power contract that no longer qualified for the normal purchase normal sale exception and a financial contract that no longer qualified as a hedge under derivative accounting in late 2009. Both contracts are marked to market through earnings and Alcoa’s obligations under the contracts expire in 2011.

Alcoa has a forward contract to purchase $56 (C$58) to mitigate the foreign currency risk related to a Canadian-denominated loan due in 2014. All other foreign exchange contracts were entered into and settled within the 2010 and 2009 first quarters.

Material Limitations

The disclosures with respect to commodity prices, interest rates, and foreign currency exchange risk do not take into account the underlying commitments or anticipated transactions. If the underlying items were included in the analysis, the gains or losses on the futures contracts may be offset. Actual results will be determined by a number of factors that are not under Alcoa’s control and could vary significantly from those factors disclosed.

Alcoa is exposed to credit loss in the event of nonperformance by counterparties on the above instruments, as well as credit or performance risk with respect to its hedged customers’ commitments. Although nonperformance is possible, Alcoa does not anticipate nonperformance by any of these parties. Contracts are with creditworthy counterparties and are further supported by cash, treasury bills, or irrevocable letters of credit issued by carefully chosen banks. In addition, various master netting arrangements are in place with counterparties to facilitate settlement of gains and losses on these contracts.

Other Financial Instruments

The carrying values and fair values of Alcoa’s other financial instruments were as follows:


	March 31, 2010				December 31, 2009
	Carrying value		Fair value		Carrying value		Fair value
Cash and cash equivalents	$	1,292	$	1,292	$	1,481	$	1,481
Restricted cash		8		8		8		8
Noncurrent receivables		21		21		24		24
Available-for-sale securities		88		88		105		105
Short-term borrowings		166		166		176		176
Long-term debt due within one year		666		666		669		669
Long-term debt, less amount due within one year		8,925		9,606		8,974		9,885

The following methods were used to estimate the fair values of other financial instruments:

Cash and cash equivalents, Restricted cash, Short-term borrowings, and Long-term debt due within one year. The carrying amounts approximate fair value because of the short maturity of the instruments.

Noncurrent receivables. The fair value of noncurrent receivables was based on anticipated cash flows, which approximates carrying value.

Available-for-sale securities. The fair value of such securities was based on quoted market prices. These financial instruments consist of exchange-traded fixed income and equity securities, which are carried at fair value and were classified in Level 1 of the fair value hierarchy.

Long-term debt, less amount due within one year. The fair value was based on interest rates that are currently available to Alcoa for issuance of debt with similar terms and maturities.

- Definition

This element can be used to disclose the entity's entire derivative instruments and hedging activities disclosure as a single block of text. Describes an entity's risk management strategies, derivatives in hedging activities and non-hedging derivative instruments, the assets, obligations, liabilities, revenues and expenses arising there from, and the amounts of and methodologies and assumptions used in determining the amounts of such items. This item also represents the complete disclosure regarding the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments, assets, and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of th e required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the Company is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risk is are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Subsequent Events	3 Months Ended
Subsequent Events	Mar. 31, 2010
Statement [Line Items]
Subsequent Events	Q. Subsequent Events – Management evaluated all activity of Alcoa and concluded that no subsequent events have occurred that would require recognition in the Consolidated Financial Statements or disclosure in the Notes to the Consolidated Financial Statements, except as disclosed in the European Commission Matters section of Note H related to a matter in Italy.