Leases - Operating and Finance Leases, Liability, Maturity (Details) $ in Millions	Sep. 30, 2020 USD ($)
Operating leases
2021	$ 102
2022	86
2023	73
2024	63
2025	48
After 2025	109
Total Lease Payments	481
Imputed Interest	(60)
Lease Liabilities	421
Finance leases
2021	5
2022	4
2023	4
2024	3
2025	3
After 2025	83
Total Lease Payments	102
Imputed Interest	(56)
Lease Liabilities	$ 46