Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Change in deferred tax asset valuation allowances	$ (1,000,000)	$ 8,000,000	$ 7,000,000
Net income impacted due to change in valuation allowances	0	0	0
Tax loss carryforward, U.S. and non-U.S.	0
Cash payments for income taxes	720,000,000	570,000,000	705,000,000
Liabilities for uncertain tax positions	89,000,000	303,000,000	$ 286,000,000	$ 300,000,000
Amount of deferred tax assets possibly to be realized	2,000,000	$ 2,000,000
Amount of tax benefit for tax settlements	249,000,000
Accrued interest related to uncertain tax position	$ 46,000,000