Income Taxes - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Mar. 31, 2020
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 113	$ 104
Effective tax rate	23.00%	22.00%
Net deferred income tax liability	$ 5,100		$ 5,500