Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income tax provision	$ 155	$ 87	$ 232	$ 226
Effective tax rate	25.60%	26.90%	26.30%	25.80%