Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Tax Disclosure [Abstract]
Applicable income tax expense	$ 202	$ 49	$ 391	$ 61
Effective income tax rate	22.10%	19.90%	21.80%	20.40%