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Income Taxes - Schedule of Provision for Income Taxes (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Current: |  |  |
Federal | $ (50) | $ 8 | $ 121
State | 1 | 11 | 31
Foreign | 74 | 42 | 204
Total current | 25 | 61 | 356
Deferred: |  |  |
Federal | (136) | (355) | (1,036)
State | (33) | (63) | (283)
Foreign | (92) | (650) | (267)
Total deferred | (261) | (1,068) | (1,586)
Total income tax benefit | (236) | (1,007) | (1,230)
Total income tax provision - discontinued operations | 0 | 31 | 129
Total income tax benefit - continuing operations | $ (236) | $ (1,038) | $ (1,359)

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