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Accumulated Other Comprehensive Loss | 9 Months Ended
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Sep. 30, 2015
Equity [Abstract] |
Accumulated Other Comprehensive Loss | C. Accumulated Other Comprehensive Loss The following table details the activity of the four components that comprise Accumulated other comprehensive loss for both Alcoa’s shareholders and noncontrolling interests:
|  | Alcoa |  |  | Noncontrolling Interests |
|  | Third quarter ended September 30, |  |  | Third quarter ended September 30, |
|  | 2015 |  |  | 2014 |  |  | 2015 |  |  | 2014 |
Pension and other postretirement benefits (M) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period |  | $ | (3,500 | ) |  | $ | (3,441 | ) |  | $ | (59 | ) |  | $ | (50 | )
Other comprehensive income (loss): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized net actuarial loss and prior service cost/benefit |  |  | 46 |  |  |  | 96 |  |  |  | 10 |  |  |  | (9 | )
Tax (expense) benefit |  |  | (10 | ) |  |  | (33 | ) |  |  | (1 | ) |  |  | 3 |
Total Other comprehensive income (loss) before reclassifications, net of tax |  |  | 36 |  |  |  | 63 |  |  |  | 9 |  |  |  | (6 | )
Amortization of net actuarial loss and prior service cost/benefit(1) |  |  | 116 |  |  |  | 97 |  |  |  | — |  |  |  | 3 |
Tax expense(2) |  |  | (41 | ) |  |  | (34 | ) |  |  | — |  |  |  | (1 | )
Total amount reclassified from Accumulated other comprehensive loss, net of tax(8) |  |  | 75 |  |  |  | 63 |  |  |  | — |  |  |  | 2 |
Total Other comprehensive income (loss) |  |  | 111 |  |  |  | 126 |  |  |  | 9 |  |  |  | (4 | )
Balance at end of period |  | $ | (3,389 | ) |  | $ | (3,315 | ) |  | $ | (50 | ) |  | $ | (54 | )
Foreign currency translation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period |  | $ | (1,606 | ) |  | $ | 569 |  |  | $ | (569 | ) |  | $ | 36 |
Other comprehensive loss(3) |  |  | (889 | ) |  |  | (774 | ) |  |  | (299 | ) |  |  | (226 | )
Balance at end of period |  | $ | (2,495 | ) |  | $ | (205 | ) |  | $ | (868 | ) |  | $ | (190 | )
Available-for-sale securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period |  | $ | — |  |  | $ | 3 |  |  | $ | — |  |  | $ | — |
Other comprehensive (loss) income(4) |  |  | (2 | ) |  |  | (1 | ) |  |  | — |  |  |  | — |
Balance at end of period |  | $ | (2 | ) |  | $ | 2 |  |  | $ | — |  |  | $ | — |
Cash flow hedges (N) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period |  | $ | 140 |  |  | $ | (299 | ) |  | $ | (6 | ) |  | $ | (8 | )
Other comprehensive income (loss): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net change from periodic revaluations |  |  | 288 |  |  |  | (35 | ) |  |  | 1 |  |  |  | 7 |
Tax (expense) benefit |  |  | (79 | ) |  |  | 11 |  |  |  | — |  |  |  | (2 | )
Total Other comprehensive income (loss) before reclassifications, net of tax |  |  | 209 |  |  |  | (24 | ) |  |  | 1 |  |  |  | 5 |
Net amount reclassified to earnings: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aluminum contracts(5) |  |  | 3 |  |  |  | 7 |  |  |  | — |  |  |  | — |
Foreign exchange contracts(5) |  |  | 2 |  |  |  | (1 | ) |  |  | — |  |  |  | — |
Nickel contracts(6) |  |  | 1 |  |  |  | — |  |  |  | — |  |  |  | — |
Sub-total |  |  | 6 |  |  |  | 6 |  |  |  | — |  |  |  | — |
Tax expense(2) |  |  | (1 | ) |  |  | (1 | ) |  |  | — |  |  |  | — |
Total amount reclassified from Accumulated other comprehensive income (loss), net of tax(8) |  |  | 5 |  |  |  | 5 |  |  |  | — |  |  |  | — |
Total Other comprehensive income (loss) |  |  | 214 |  |  |  | (19 | ) |  |  | 1 |  |  |  | 5 |
Balance at end of period |  | $ | 354 |  |  | $ | (318 | ) |  | $ | (5 | ) |  | $ | (3 | )
|  | Alcoa |  |  | Noncontrolling Interests |
|  | Nine months ended September 30, |  |  | Nine months ended September 30, |
|  | 2015 |  |  | 2014 |  |  | 2015 |  |  | 2014 |
Pension and other postretirement benefits (M) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period |  | $ | (3,601 | ) |  | $ | (3,532 | ) |  | $ | (64 | ) |  | $ | (51 | )
Other comprehensive income (loss): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized net actuarial loss and prior service cost/benefit |  |  | (30 | ) |  |  | 33 |  |  |  | 13 |  |  |  | (9 | )
Tax benefit (expense) |  |  | 18 |  |  |  | (8 | ) |  |  | (1 | ) |  |  | 3 |
Total Other comprehensive (loss) income before reclassifications, net of tax |  |  | (12 | ) |  |  | 25 |  |  |  | 12 |  |  |  | (6 | )
Amortization of net actuarial loss and prior service cost/benefit(1) |  |  | 345 |  |  |  | 296 |  |  |  | 4 |  |  |  | 5 |
Tax expense(2) |  |  | (121 | ) |  |  | (104 | ) |  |  | (2 | ) |  |  | (2 | )
Total amount reclassified from Accumulated other comprehensive loss, net of tax(8) |  |  | 224 |  |  |  | 192 |  |  |  | 2 |  |  |  | 3 |
Total Other comprehensive income (loss) |  |  | 212 |  |  |  | 217 |  |  |  | 14 |  |  |  | (3 | )
Balance at end of period |  | $ | (3,389 | ) |  | $ | (3,315 | ) |  | $ | (50 | ) |  | $ | (54 | )
Foreign currency translation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period |  | $ | (846 | ) |  | $ | 179 |  |  | $ | (351 | ) |  | $ | (110 | )
Other comprehensive loss(3) |  |  | (1,649 | ) |  |  | (384 | ) |  |  | (517 | ) |  |  | (80 | )
Balance at end of period |  | $ | (2,495 | ) |  | $ | (205 | ) |  | $ | (868 | ) |  | $ | (190 | )
Available-for-sale securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period |  | $ | — |  |  | $ | 2 |  |  | $ | — |  |  | $ | — |
Other comprehensive loss(4) |  |  | (2 | ) |  |  | — |  |  |  | — |  |  |  | — |
Balance at end of period |  | $ | (2 | ) |  | $ | 2 |  |  | $ | — |  |  | $ | — |
Cash flow hedges (N) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period |  | $ | (230 | ) |  | $ | (308 | ) |  | $ | (2 | ) |  | $ | (2 | )
Other comprehensive income (loss): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net change from periodic revaluations |  |  | 792 |  |  |  | (31 | ) |  |  | (4 | ) |  |  | (2 | )
Tax (expense) benefit |  |  | (235 | ) |  |  | 7 |  |  |  | 1 |  |  |  | 1 |
Total Other comprehensive income (loss) before reclassifications, net of tax |  |  | 557 |  |  |  | (24 | ) |  |  | (3 | ) |  |  | (1 | )
Net amount reclassified to earnings: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aluminum contracts(5) |  |  | 26 |  |  |  | 18 |  |  |  | — |  |  |  | — |
Energy contracts(6) |  |  | 4 |  |  |  | — |  |  |  | — |  |  |  | — |
Foreign exchange contracts(5) |  |  | 3 |  |  |  | (2 | ) |  |  | — |  |  |  | — |
Interest rate contracts(7) |  |  | 1 |  |  |  | 1 |  |  |  | — |  |  |  | — |
Nickel contracts(6) |  |  | 1 |  |  |  | — |  |  |  | — |  |  |  | — |
Sub-total |  |  | 35 |  |  |  | 17 |  |  |  | — |  |  |  | — |
Tax expense(2) |  |  | (8 | ) |  |  | (3 | ) |  |  | — |  |  |  | — |
Total amount reclassified from Accumulated other comprehensive loss, net of tax(8) |  |  | 27 |  |  |  | 14 |  |  |  | — |  |  |  | — |
Total Other comprehensive income (loss) |  |  | 584 |  |  |  | (10 | ) |  |  | (3 | ) |  |  | (1 | )
Balance at end of period |  | $ | 354 |  |  | $ | (318 | ) |  | $ | (5 | ) |  | $ | (3 | )
(1) | These amounts were included in the computation of net periodic benefit cost for pension and other postretirement benefits (see Note M).
(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) | In all periods presented, unrealized and realized gains and losses related to these securities were immaterial. Realized gains and losses were included in Other (income) expenses, net on the accompanying Statement of Consolidated Operations.
(5) | These amounts were included in Sales on the accompanying Statement of Consolidated Operations.
(6) | These amounts were included in Cost of goods sold on the accompanying Statement of Consolidated Operations.
(7) | These amounts were included in Interest expense on the accompanying Statement of Consolidated Operations.
(8) | 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 7.

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e689-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669619-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e640-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e716-108580 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e709-108580 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e637-108580 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e681-108580 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Reclassification Adjustments -URI http://asc.fasb.org/extlink&oid=6522872 + Details
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