v3.22.4

Accumulated Other Comprehensive (Loss) Income​​ (Tables) | 12 Months Ended
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Dec. 31, 2022
Equity [Abstract] |
Schedule of Accumulated Other Comprehensive (Loss) Income​ | The following table details the activity of the three components that comprise Accumulated other comprehensive loss for Arconic (such activity for Noncontrolling interest was immaterial for all periods presented):
|  | 2022 |  | 2021 |  | 2020
Pension and other postretirement benefits (H) |  |  |  |  |  |
Balance at beginning of period |  | $ | (1,121) |  |  | $ | (1,791) |  |  | $ | (43) |
Establishment of additional defined benefit plans |  | — |  |  | — |  |  | (1,752) |
Separation-related adjustments (A) |  | — |  |  | — |  |  | (50) |
Other comprehensive income: |  |  |  |  |  |
Unrecognized net actuarial loss and prior service cost/benefit |  | 176 |  |  | 190 |  |  | (259) |
Tax (expense) benefit |  | (41) |  |  | (43) |  |  | 62 |
Total Other comprehensive income (loss) before reclassifications, net of tax |  | 135 |  |  | 147 |  |  | (197) |
Amortization of net actuarial loss and prior service cost/benefit(1) |  | 124 |  |  | 680 |  |  | 326 |
Tax expense(2) |  | (30) |  |  | (157) |  |  | (75) |
Total amount reclassified from Accumulated other comprehensive loss, net of tax(5) |  | 94 |  |  | 523 |  |  | 251 |
Total Other comprehensive income |  | 229 |  |  | 670 |  |  | 54 |
Balance at end of period |  | $ | (892) |  |  | $ | (1,121) |  |  | $ | (1,791) |
Foreign currency translation |  |  |  |  |  |
Balance at beginning of period |  | $ | 25 |  |  | $ | 29 |  |  | $ | 338 |
Separation-related adjustments (A) |  | — |  |  | — |  |  | (396) |
Other comprehensive (loss) income: |  |  |  |  |  |
Foreign currency translation(3) |  | (76) |  |  | (4) |  |  | 65 |
Net amount reclassified to earnings from Accumulated other comprehensive income(3),(5) |  | — |  |  | — |  |  | 22 |
Total Other comprehensive (loss) income |  | (76) |  |  | (4) |  |  | 87 |
Balance at end of period |  | $ | (51) |  |  | $ | 25 |  |  | $ | 29 |
Cash flow hedges (U) |  |  |  |  |  |
Balance at beginning of period |  | $ | (15) |  |  | $ | 1 |  |  | $ | — |
Separation-related adjustments (A) |  | — |  |  | — |  |  | (4) |
Other comprehensive income (loss): |  |  |  |  |  |
Net change from periodic revaluations |  | 95 |  |  | (161) |  |  | (2) |
Tax (expense) benefit |  | (22) |  |  | 37 |  |  | 1 |
Total Other comprehensive income (loss) before reclassifications, net of tax |  | 73 |  |  | (124) |  |  | (1) |
Net amount reclassified to earnings: |  |  |  |  |  |
Aluminum(4) |  | (48) |  |  | 142 |  |  | 8 |
Energy(4) |  | (20) |  |  | — |  |  | — |
Alloying materials(4) |  | 1 |  |  | (2) |  |  | — |
Sub-total |  | (67) |  |  | 140 |  |  | 8 |
Tax benefit (expense)(2) |  | 15 |  |  | (32) |  |  | (2) |
Total amount reclassified from Accumulated other comprehensive income, net of tax(5) |  | (52) |  |  | 108 |  |  | 6 |
Total Other comprehensive income (loss) |  | 21 |  |  | (16) |  |  | 5 |
Balance at end of period |  | $ | 6 |  |  | $ | (15) |  |  | $ | 1 |
Accumulated other comprehensive loss |  | $ | (937) |  |  | $ | (1,111) |  |  | $ | (1,761) |
_____________________ (1)These amounts were included in the non-service component of net periodic benefit cost for pension and other postretirement benefits (see Note H). In 2022, 2021, and 2020, this amount includes $47, $584, and $199, respectively, related to the settlement of certain employee retirement benefits (see Note H). (2)These amounts were reported in (Benefit) 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. In 2020, the net amount reclassified to earnings was reported in Restructuring and other charges on the accompanying Statement of Consolidated Operations related to the sale of certain foreign subsidiaries. (4)A portion of the amounts related to aluminum were reported in each of Sales and Cost of goods sold on the accompanying Statement of Consolidated Operations (see Note U). The amounts related to energy and alloying materials were reported in Cost of goods sold on the accompanying Statement of Consolidated Operations (see Note U). (5)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 4.

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