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Recently Adopted and Recently Issued Accounting Guidance (Tables) | 3 Months Ended
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Mar. 31, 2013
Summary of Changes in Accumulated Other Comprehensive Loss by Component | The changes in Accumulated other comprehensive loss by component were as follows:
|  | Alcoa |  |  | Noncontrolling Interests |
|  | First quarter ended March 31, |  |  | First quarter ended March 31, |
|  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
Pension and other postretirement benefits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period |  | $ | (4,063 | ) |  | $ | (3,533 | ) |  | $ | (77 | ) |  | $ | (99 | )
Other comprehensive income: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized net actuarial loss and prior service cost/benefit |  |  | 11 |  |  |  | (13) |  |  |  | — |  |  |  | — |
Tax (expense) benefit |  |  | (3) |  |  |  | 3 |  |  |  | — |  |  |  | — |
Total Other comprehensive income before reclassifications, net of tax |  |  | 8 |  |  |  | (10) |  |  |  | — |  |  |  | — |
Amortization of net actuarial loss and prior service cost/benefit(1) |  |  | 132 |  |  |  | 101 |  |  |  | 1 |  |  |  | 2 |
Tax (expense) benefit(2) |  |  | (45 | ) |  |  | (35 | ) |  |  | — |  |  |  | — |
Total amount reclassified from Accumulated other comprehensive loss, net of tax(6) |  |  | 87 |  |  |  | 66 |  |  |  | 1 |  |  |  | 2 |
Total Other comprehensive income |  |  | 95 |  |  |  | 56 |  |  |  | 1 |  |  |  | 2 |
Balance at end of period |  | $ | (3,968 | ) |  | $ | (3,477 | ) |  | $ | (76 | ) |  | $ | (97 | )
Foreign currency translation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period |  | $ | 1,147 |  |  | $ | 1,349 |  |  | $ | 257 |  |  | $ | 351 |
Other comprehensive (loss) income: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency translation adjustments(3) |  |  | (116 | ) |  |  | 244 |  |  |  | 16 |  |  |  | 65 |
Balance at end of period |  | $ | 1,031 |  |  | $ | 1,593 |  |  | $ | 273 |  |  | $ | 416 |
Available-for-sale securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period |  | $ | 3 |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Other comprehensive income: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net unrealized holding (loss) gain |  |  | (1 | ) |  |  | 3 |  |  |  | — |  |  |  | — |
Tax benefit (expense) |  |  | — |  |  |  | (1 | ) |  |  | — |  |  |  | — |
Total Other comprehensive (loss) income before reclassifications, net of tax |  |  | (1 | ) |  |  | 2 |  |  |  | — |  |  |  | — |
Net amount reclassified to earnings(4) |  |  | 2 |  |  |  | — |  |  |  | — |  |  |  | — |
Tax benefit (expense)(2) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Total amount reclassified from Accumulated other comprehensive income, net of tax(6) |  |  | 2 |  |  |  | — |  |  |  | — |  |  |  | — |
Total Other comprehensive income |  |  | 1 |  |  |  | 2 |  |  |  | — |  |  |  | — |
Balance at end of period |  | $ | 4 |  |  | $ | 2 |  |  | $ | — |  |  | $ | — |
Cash flow hedges (M) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period |  | $ | (489 | ) |  | $ | (443 | ) |  | $ | (5 | ) |  | $ | (4 | )
Other comprehensive income (loss): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net change from periodic revaluations |  |  | 136 |  |  |  | (103 | ) |  |  | 3 |  |  |  | (3 | )
Tax (expense) benefit |  |  | (29 | ) |  |  | 21 |  |  |  | (1 | ) |  |  | 1 |
Total Other comprehensive income (loss) before reclassifications, net of tax |  |  | 107 |  |  |  | (82 | ) |  |  | 2 |  |  |  | (2 | )
Net amount reclassified to earnings: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aluminum contracts(5) |  |  | 7 |  |  |  | — |  |  |  | — |  |  |  | — |
Interest rate contracts(4) |  |  | — |  |  |  | (1 | ) |  |  | — |  |  |  | — |
Sub-total |  |  | 7 |  |  |  | (1 | ) |  |  | — |  |  |  | — |
Tax (expense) benefit(2) |  |  | (1 | ) |  |  | 2 |  |  |  | — |  |  |  | — |
Total amount reclassified from Accumulated other comprehensive loss, net of tax(6) |  |  | 6 |  |  |  | 1 |  |  |  | — |  |  |  | — |
Total Other comprehensive income (loss) |  |  | 113 |  |  |  | (81 | ) |  |  | 2 |  |  |  | (2 | )
Balance at end of period |  | $ | (376 | ) |  | $ | (524 | ) |  | $ | (3 | ) |  | $ | (6 | )
(1) | These amounts were included in the computation of net periodic benefit cost for pension and other postretirement benefits (see Note L).
(2) | These amounts were included in Provision for income taxes on the accompanying Statement of Consolidated Operations.
(3) | In all periods presented, there were no tax impacts related to rate changes and no amounts were reclassified to earnings.
(4) | This amount was included in Other income, net on the accompanying Statement of Consolidated Operations.
(5) | This amount was included in Sales on the accompanying Statement of Consolidated Operations.
(6) | A positive amount indicates a corresponding charge to earnings and a negative amount indicates a corresponding benefit to earnings. These amounts were reflected on the accompanying Statement of Consolidated Operations in the line items indicated in footnotes 1 through 5.

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=20435746&loc=SL7669686-108580 + Details
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