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Income Taxes - Additional Information (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Income Tax Disclosure [Line Items] |  |  |  |
Provisional Tax Act tax expense |  |  | $ 773,000,000 |
Reduction in provisional tax expense |  | $ 44,000,000 |  |
Additional tax expense |  | 729,000,000 |  |
Increase in valuation allowance balances | $ 8,000,000 | 7,000,000 | 37,000,000 |
Net income impacted due to change in valuation allowances | 0 | 0 |  |
Tax loss carryforward, U.S. and non-U.S. | 6,000,000 |  |  |
Tax loss carryforward, U.S. and non-U.S., set to expire | 0 |  |  |
Cash payments for income taxes | 570,000,000 | 705,000,000 | 1,800,000,000 |
Liabilities for uncertain tax positions | 303,000,000 | 286,000,000 | $ 300,000,000 | $ 243,000,000
Amount of deferred tax assets possibly to be realized | 2,000,000 | $ 30,000,000 |  |
Maximum |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |
Decrease in liabilities for uncertain tax positions | $ 249,000,000 |  |  |

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