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Accumulated Other Comprehensive Loss | 6 Months Ended
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Jun. 30, 2021
Equity [Abstract] |
Accumulated Other Comprehensive Loss | Accumulated Other Comprehensive LossThe following table details the activity of the four components that comprise Accumulated other comprehensive loss:
| Second quarter ended |  | Six months ended
| June 30, |  | June 30,
| 2021 |  | 2020 |  | 2021 |  | 2020
Pension and other postretirement benefits (G) |  |  |  |  |  |  |
Balance at beginning of period | $ | (938) |  |  | $ | (2,695) |  |  | $ | (980) |  |  | $ | (2,732) |
Other comprehensive income: |  |  |  |  |  |  |
Unrecognized net actuarial gain (loss) and prior service cost/benefit | 30 |  |  | (60) |  |  | 67 |  |  | (59) |
Tax (expense) benefit | (7) |  |  | 8 |  |  | (15) |  |  | 8 |
Total Other comprehensive income (loss) before reclassifications, net of tax | 23 |  |  | (52) |  |  | 52 |  |  | (51) |
Amortization of net actuarial loss and prior service cost(1) | 15 |  |  | 74 |  |  | 31 |  |  | 117 |
Tax expense(2) | (3) |  |  | (13) |  |  | (6) |  |  | (20) |
Total amount reclassified from Accumulated other comprehensive loss, net of tax(3) | 12 |  |  | 61 |  |  | 25 |  |  | 97 |
Total Other comprehensive income | 35 |  |  | 9 |  |  | 77 |  |  | 46 |
Transfer to Arconic Corporation | — |  |  | 1,820 |  |  | — |  |  | 1,820 |
Balance at end of period | $ | (903) |  |  | $ | (866) |  |  | $ | (903) |  |  | $ | (866) |
Foreign currency translation |  |  |  |  |  |  |
Balance at beginning of period | $ | (1,010) |  |  | $ | (661) |  |  | $ | (966) |  |  | $ | (596) |
Foreign currency translation | 18 |  |  | (8) |  |  | (26) |  |  | (87) |
Net amount reclassified from Accumulated other comprehensive loss(4) | — |  |  | — |  |  | — |  |  | 14 |
Other comprehensive income (loss) | 18 |  |  | (8) |  |  | (26) |  |  | (73) |
Transfer to Arconic Corporation | — |  |  | (428) |  |  | — |  |  | (428) |
Balance at end of period | $ | (992) |  |  | $ | (1,097) |  |  | $ | (992) |  |  | $ | (1,097) |
Debt securities |  |  |  |  |  |  |
Balance at beginning of period | $ | — |  |  | $ | 1 |  |  | $ | — |  |  | $ | — |
Other comprehensive loss(5) | — |  |  | (1) |  |  | — |  |  | — |
Balance at end of period | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Cash flow hedges |  |  |  |  |  |  |
Balance at beginning of period | $ | 7 |  |  | $ | (14) |  |  | $ | 3 |  |  | $ | (1) |
Other comprehensive income (loss): |  |  |  |  |  |  |
Net change from periodic revaluations | 11 |  |  | 3 |  |  | 19 |  |  | (8) |
Tax (expense) income | (2) |  |  | 1 |  |  | (4) |  |  | — |
Total Other comprehensive income (loss) before reclassifications, net of tax | 9 |  |  | 4 |  |  | 15 |  |  | (8) |
Net amount reclassified to earnings | (5) |  |  | 5 |  |  | (8) |  |  | 4 |
Tax expense(2) | — |  |  | — |  |  | 1 |  |  | — |
Total amount reclassified from Accumulated other comprehensive (loss) income, net of tax(3) | (5) |  |  | 5 |  |  | (7) |  |  | 4 |
Total Other comprehensive income (loss) | 4 |  |  | 9 |  |  | 8 |  |  | (4) |
Balance at end of period | $ | 11 |  |  | $ | (5) |  |  | $ | 11 |  |  | $ | (5) |
Accumulated other comprehensive loss | $ | (1,884) |  |  | $ | (1,968) |  |  | $ | (1,884) |  |  | $ | (1,968) |
(1)These amounts were recorded in Other expense (income), net on the Statement of Consolidation Operations (see Note F). (2)These amounts were included in Provision (benefit) for income taxes on the 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)Foreign currency translation charges were included in Restructuring and other charges on the Statement of Consolidated Operations due to the sale of foreign entities. (5)Realized gains and losses were included in Other expense (income), net on the 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 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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