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