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Income Taxes - Components of Income Tax (Benefit) Expense (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income Tax Disclosure [Abstract] |  |  |
US Tax Reform, Provisional Tax Expense | $ 0 | $ 37 | $ 130
Current |  |  |
Federal | 1 | 18 | 14
State | 2 | 0 | 2
Foreign | 78 | 42 | 54
Deferred |  |  |
Federal | (19) | (2) | 178
State | 0 | 1 | (3)
Foreign | (335) | 14 | (3)
Total income tax expense (benefit) | $ (273) | $ 73 | $ 242

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