Leases - Supplemental Operating Lease Information (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease right-of-use assets	$ 95	$ 94
Accrued liabilities	25	26
Operating lease liabilities	78	77
Operating lease liabilities	103	103
Operating Lease, Right-of-Use Asset, in Exchange for Lease Obligations	$ 8	$ 8
Operating Lease, Weighted Average Remaining Lease Term	5 years	5 years
Weighted average discount rate	5.00%	5.00%