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Accumulated Other Comprehensive Loss | 12 Months Ended
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Dec. 31, 2019
Equity [Abstract] |
Accumulated Other Comprehensive Loss | Accumulated Other Comprehensive Loss The following table details the activity of the four components that comprise Accumulated other comprehensive loss for both Arconic’s shareholders and noncontrolling interests:
| Arconic |  | Noncontrolling Interests
| 2019 |  | 2018 |  | 2017 |  | 2019 |  | 2018 |  | 2017
Pension and other postretirement benefits (F) |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period | $ | (2,344 | ) |  | $ | (2,230 | ) |  | $ | (2,010 | ) |  | $ | — |  |  | $ | — |  |  | $ | — |
Adoption of accounting standard (A) | — |  |  | (369 | ) |  | — |  |  | — |  |  | — |  |  | — |
Other comprehensive (loss) income: |  |  |  |  |  |  |  |  |  |  | — |
Unrecognized net actuarial gain and prior service cost/benefit | (587 | ) |  | 70 |  |  | (466 | ) |  | — |  |  | — |  |  | — |
Tax benefit (expense) | 129 |  |  | (19 | ) |  | 102 |  |  | — |  |  | — |  |  | — |
Total Other comprehensive (loss) income before reclassifications, net of tax | (458 | ) |  | 51 |  |  | (364 | ) |  | — |  |  | — |  |  | — |
Amortization of net actuarial loss and prior service cost(1) | 90 |  |  | 262 |  |  | 222 |  |  | — |  |  | — |  |  | — |
Tax expense(2) | (20 | ) |  | (58 | ) |  | (78 | ) |  | — |  |  | — |  |  | — |
Total amount reclassified from Accumulated other comprehensive loss, net of tax(3) | 70 |  |  | 204 |  |  | 144 |  |  | — |  |  | — |  |  | — |
Total Other comprehensive (loss) income | (388 | ) |  | 255 |  |  | (220 | ) |  | — |  |  | — |  |  | — |
Balance at end of period | $ | (2,732 | ) |  | $ | (2,344 | ) |  | $ | (2,230 | ) |  | $ | — |  |  | $ | — |  |  | $ | — |
Foreign currency translation |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period | $ | (583 | ) |  | $ | (437 | ) |  | $ | (689 | ) |  | $ | — |  |  | $ | — |  |  | $ | (2 | )
Other comprehensive (loss) income(4) | (13 | ) |  | (146 | ) |  | 252 |  |  | — |  |  | — |  |  | 2 |
Balance at end of period | $ | (596 | ) |  | $ | (583 | ) |  | $ | (437 | ) |  | $ | — |  |  | $ | — |  |  | $ | — |
Debt securities |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period | $ | (3 | ) |  | $ | (2 | ) |  | $ | 132 |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Other comprehensive income (loss)(5) | 3 |  |  | (1 | ) |  | (134 | ) |  | — |  |  | — |  |  | — |
Balance at end of period | $ | — |  |  | $ | (3 | ) |  | $ | (2 | ) |  | $ | — |  |  | $ | — |  |  | $ | — |
Cash flow hedges |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period | $ | 4 |  |  | $ | 25 |  |  | $ | (1 | ) |  | $ | — |  |  | $ | — |  |  | $ | — |
Adoption of accounting standard (A) | (2 | ) |  | 2 |  |  | — |  |  | — |  |  | — |  |  | — |
Other comprehensive (loss) income: |  |  |  |  |  |  |  |  |  |  |
Net change from periodic revaluations | (9 | ) |  | (15 | ) |  | 37 |  |  | — |  |  | — |  |  | — |
Tax benefit (expense) | 3 |  |  | 3 |  |  | (9 | ) |  | — |  |  | — |  |  | — |
Total Other comprehensive (loss) income before reclassifications, net of tax | (6 | ) |  | (12 | ) |  | 28 |  |  | — |  |  | — |  |  | — |
Net amount reclassified to earnings |  |  |  |  |  |  |  |  |  |  |
Aluminum contracts(6) | 5 |  |  | (8 | ) |  | (2 | ) |  | — |  |  | — |  |  | — |
Interest rate contracts(8) | — |  |  | (2 | ) |  | — |  |  | — |  |  | — |  |  | — |
Nickel contracts(7) | (1 | ) |  | (4 | ) |  | (1 | ) |  | — |  |  | — |  |  | — |
Sub-total | 4 |  |  | (14 | ) |  | (3 | ) |  | — |  |  | — |  |  | — |
Tax (expense) benefit(2) | (1 | ) |  | 3 |  |  | 1 |  |  | — |  |  | — |  |  | — |
Total amount reclassified from Accumulated other comprehensive loss, net of tax(3) | 3 |  |  | (11 | ) |  | (2 | ) |  | — |  |  | — |  |  | — |
Total Other comprehensive (loss) income | (3 | ) |  | (23 | ) |  | 26 |  |  | — |  |  | — |  |  | — |
Balance at end of period | $ | (1 | ) |  | $ | 4 |  |  | $ | 25 |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Accumulated other comprehensive loss | $ | (3,329 | ) |  | $ | (2,926 | ) |  | $ | (2,644 | ) |  | $ | — |  |  | $ | — |  |  | $ | — |
(1) | These amounts were recorded in Other expense (income), net (see Note E).
(2) | These amounts were included in Provision for income taxes on the accompanying Statement of Consolidated Operations.
(3) | A positive amount indicates a corresponding charge to earnings and a negative amount indicates a corresponding benefit to earnings.
(4) | In all periods presented, no amounts were reclassified to earnings.
(5) | Realized gains and losses were included in Other expense (income), net, on the accompanying Statement of Consolidated Operations.
(6) | These amounts were included in Sales on the accompanying Statement of Consolidated Operations.
(7) | These amounts were included in Cost of goods sold on the accompanying Statement of Consolidated Operations.
(8) These amounts were included in Interest expense on the accompanying Statement of Consolidated Operations.

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI http://asc.fasb.org/topic&trid=2134417 + Details
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- References No definition available. + Details
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