Income Taxes - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Effective income tax rate	(42.30%)	27.40%	(0.90%)	23.40%
Deferred tax asset, period increase (decrease)	$ (64)		$ (64)
Effective tax rate, period increase (decrease)	(55.20%)	10.40%	(16.50%)	5.60%
Unrecognized tax benefits, increase related to prior restructuring transaction				$ 37
Effective income tax rate reconciliation, stock option exercises		4.00%		4.10%