Leases Maturity (Details) $ in Millions	Dec. 31, 2019 USD ($)
Leases [Abstract]
2020 - Operating Leases	$ 235
2020 - Financing Leases	61
2021 - Operating Leases	186
2021 - Financing Leases	62
2022 - Operating Leases	149
2022 - Financing Leases	62
2023 - Operating Leases	107
2023 - Financing Leases	61
2024 - Operating Leases	71
2024 - Financing Leases	48
Thereafter - Operating Leases	442
Thereafter - Financing Leases	82
Total lease payments - Operating Leases	1,190
Total lease payments - Financing Leases	376
Imputed interest - Operating Leases	(157)
Imputed interest - Financing Leases	(233)
Total - Operating Leases	1,033
Total - Financing Leases	$ 143