Leases - Lease Maturity (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2020	$ 114,000,000
2021	63,000,000
2022	35,000,000
2023	5,000,000
2024	1,000,000
Thereafter	0
Total undiscounted lease payments	218,000,000
Less: amount representing interest	10,000,000
Total operating lease liabilities	208,000,000
Less: current portion of long-term lease liability as of December 31, 2019	101,000,000
Long-term lease liability as of December 31, 2019	107,000,000
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2019	62,000,000
2020	54,000,000
2021	35,000,000
2022	12,000,000
2023	5,000,000
Thereafter	49,000,000
Sublease rentals	0
Total minimum lease payments	$ 217,000,000
Future minimum commitments for capital lease obligations		$ 0