Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Tax Disclosure [Abstract]
Income tax provision (benefit)	$ 89	$ 131
Effective Income Tax Rate	13.50%	17.80%
U.S. corporate income tax rate	21.00%	21.00%
Income tax expense as a result of one-time discrete event		$ 38