Leases - Maturity Schedules (Details) $ in Millions	Dec. 31, 2019 USD ($)
Operating leases
2020	$ 109
2021	84
2022	61
2023	44
2024	27
Thereafter	40
Total future undiscounted lease payments	365
Less imputed interest	(35)
Total reported lease liability	330
Finance leases
2020	2
2021	0
2022	0
2023	0
2024	0
Thereafter	0
Total future undiscounted lease payments	2
Less imputed interest	0
Total reported lease liability	$ 2