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Income Taxes - Reconciliation of Income Taxes (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income Taxes [Line Items] |  |  |
U.S. federal income tax expense (benefit) at the statutory rate of 21% | $ (239) | $ 37 | $ 212
Net foreign losses (income) with no tax due to valuation allowances | 37 | 48 | 7
Goodwill impairment | 34 | 0 | 0
Deferred tax impact of enacted tax rate and law changes | (18) | 3 | 0
State income taxes, net of U.S. federal benefit | (17) | (1) | (1)
U.S. charges (benefits) related to foreign tax credits, R&D and foreign derived intangible deduction | (9) | (17) | 20
Adjustment for foreign income taxed at different rates | 7 | 16 | 30
Net establishment of uncertain tax positions | 6 | 7 | 18
Federal and state tax on accelerated royalty income transaction | 0 | 334 | 0
Other | (1) | 5 | (3)
United States and Foreign Tax Expense | 110 | 474 | 303
Foreign Tax Authority |  |  |
Income Taxes [Line Items] |  |  |
Net establishment (release) of U.S. valuation allowances | 0 | 140 | (5)
Domestic Tax Authority |  |  |
Income Taxes [Line Items] |  |  |
Net establishment (release) of U.S. valuation allowances | $ 310 | $ (98) | $ 25

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