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Accumulated Other Comprehensive Loss (Tables) | 12 Months Ended
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Dec. 31, 2022
Equity [Abstract] |
Summary of Changes in Accumulated Other Comprehensive Loss by Component | The following table details the activity of the three components that comprise Accumulated other comprehensive loss:
| 2022 |  | 2021 |  | 2020 |  |  |  |  |  |
Pension and other postretirement benefits (H) |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period | $ | (799) |  |  | $ | (980) |  |  | $ | (2,732) |  |  |  |  |  |  |
Other comprehensive income (loss): |  |  |  |  |  |  |  |  |  |  |
Unrecognized net actuarial gain (loss) and prior service cost/benefit | 87 |  |  | 111 |  |  | (211) |  |  |  |  |  |  |
Tax (expense) benefit | (18) |  |  | (26) |  |  | 48 |  |  |  |  |  |  |
Total Other comprehensive income (loss) before reclassifications, net of tax | 69 |  |  | 85 |  |  | (163) |  |  |  |  |  |  |
Amortization of net actuarial loss and prior service cost(1) | 99 |  |  | 123 |  |  | 149 |  |  |  |  |  |  |
Tax expense(2) | (22) |  |  | (27) |  |  | (32) |  |  |  |  |  |  |
Total amount reclassified from Accumulated other comprehensive loss, net of tax(3) | 77 |  |  | 96 |  |  | 117 |  |  |  |  |  |  |
Total Other comprehensive income (loss) | 146 |  |  | 181 |  |  | (46) |  |  |  |  |  |  |
Transfer to Arconic Corporation | — |  |  | — |  |  | 1,798 |  |  |  |  |  |  |
Balance at end of period | $ | (653) |  |  | $ | (799) |  |  | $ | (980) |  |  |  |  |  |  |
Foreign currency translation |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period | $ | (1,062) |  |  | $ | (966) |  |  | $ | (596) |  |  |  |  |  |  |
Other comprehensive (loss) income(4) | (131) |  |  | (96) |  |  | 58 |  |  |  |  |  |  |
Transfer to Arconic Corporation | — |  |  | — |  |  | (428) |  |  |  |  |  |  |
Balance at end of period | $ | (1,193) |  |  | $ | (1,062) |  |  | $ | (966) |  |  |  |  |  |  |
Cash flow hedges |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period | $ | (2) |  |  | $ | 3 |  |  | $ | (1) |  |  |  |  |  |  |
Other comprehensive (loss) income: |  |  |  |  |  |  |  |  |  |  |
Net change from periodic revaluations | (8) |  |  | 20 |  |  | — |  |  |  |  |  |  |
Tax benefit (expense) | 2 |  |  | (4) |  |  | — |  |  |  |  |  |  |
Total Other comprehensive (loss) income before reclassifications, net of tax | (6) |  |  | 16 |  |  | — |  |  |  |  |  |  |
Net amount reclassified to earnings | 17 |  |  | (26) |  |  | 6 |  |  |  |  |  |  |
Tax (expense) benefit(2) | (4) |  |  | 5 |  |  | (2) |  |  |  |  |  |  |
Total amount reclassified from Accumulated other comprehensive income (loss), net of tax(3) | 13 |  |  | (21) |  |  | 4 |  |  |  |  |  |  |
Total Other comprehensive income (loss) | 7 |  |  | (5) |  |  | 4 |  |  |  |  |  |  |
Balance at end of period | $ | 5 |  |  | $ | (2) |  |  | $ | 3 |  |  |  |  |  |  |
Accumulated other comprehensive loss balance at end of period | $ | (1,841) |  |  | $ | (1,863) |  |  | $ | (1,943) |  |  |  |  |  |  |
(1)These amounts were recorded in Other expense, net (see Note G) and Restructuring and other charges (see Note E) in the Statement of Consolidated Operations. (2)These amounts were included in Provision (benefit) for income taxes (see Note I) in 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)In all periods presented, no amounts were reclassified to earnings.

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI https://asc.fasb.org/extlink&oid=126968391&loc=SL7669686-108580 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -URI https://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
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