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v3.19.3.a.u2

Other Expense (Income), Net - Additional Information (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Feb. 28, 2017 | Jun. 30, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Other Non operating Income Expense [Line Items] |  |  |  |  |  |
Income tax benefit |  |  | $ (105) | $ (226) | $ (544) |
Tax agreement, indemnification of ultimate liability, percent |  |  |  | 49.00% |  |
Net loss (gain) from asset sales |  |  | (7) | $ (10) | 513 |
Pre-tax gain on sale of common stock |  | $ 167 |  |  | 167 |
Total amount committed under outstanding surety bonds |  |  | $ 50 |  |  |
Separation Agreement |  |  |  |  |  |
Other Non operating Income Expense [Line Items] |  |  |  |  |  |
Total amount committed under outstanding surety bonds |  |  |  |  | 25 |
Firth Rixson |  |  |  |  |  |
Other Non operating Income Expense [Line Items] |  |  |  |  |  |
Contingent consideration arrangements, change in amount of contingent consideration, liability |  |  |  |  | 81 | $ 56
Alcoa Corporation |  |  |  |  |  |
Other Non operating Income Expense [Line Items] |  |  |  |  |  |
Net loss (gain) from asset sales |  |  |  |  | $ 351 |
Pre-tax gain on sale of common stock | $ 351 |  |  |  |  |
Spain | Other Nonoperating Income (Expense) | Alcoa Corporation |  |  |  |  |  |
Other Non operating Income Expense [Line Items] |  |  |  |  |  |
Income tax benefit |  |  |  | $ 29 |  |

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