Commitments and Contingencies (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Unrecorded unconditional purchase obligation	$ 47	$ 44
Purchase obligation, fixed fee cap		14
Purchase obligation, variable fee cap		39
Future contingent termination fees, period one		10
Future contingent termination fees, period two		12
Future contingent termination fees, period three		$ 14
Purchase obligation, variable fees incurred	3
Purchase obligation, fixed fees incurred	$ 1