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Other Expense, Net - Schedule of Other Expenses (Income), Net (Details) € in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2020 EUR (€)
Schedule Of Other Non operating Income Expense [Line Items] |  |  |  |
Non-service costs - pension and other postretirement benefits (H) | $ 16 | $ 9 | $ 26 |
Interest income | (6) | (2) | (5) |
Foreign currency (gains) losses, net | (1) | 2 | (11) |
Net realized and unrealized losses | 18 | 9 | 8 |
Deferred compensation | (8) | 8 | 10 |
Judgment from legal proceeding (V) | 65 | 0 | 0 |
Other, net | (2) | (7) | 46 |
Total | $ 82 | $ 19 | $ 74 |
Alcoa Corporation |  |  |  |
Schedule Of Other Non operating Income Expense [Line Items] |  |  |  |
Tax agreement, indemnification of ultimate liability, percent |  |  | 49.00% | 49.00%
Spain |  |  |  |
Schedule Of Other Non operating Income Expense [Line Items] |  |  |  |
Income taxes receivable |  |  | $ 53 | € 45
Tax agreement, indemnification of ultimate liability, percent |  |  | 33.66% | 33.66%

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