Lease Commitments - Schedule of Operating and Finance Lease Maturities (Details) - USD ($) $ in Millions	Sep. 30, 2019	Aug. 08, 2019
Operating Leases
Remainder of 2019	$ 119	$ 90
2020	390	172
2021	197	64
2022	129	42
2023	94	28
Thereafter	311	136
Total lease payments	1,240	532
Less: Interest	(101)	(44)
Total lease liabilities	1,139	488
Finance Leases
Remainder of 2019	8	7
2020	38	25
2021	15	15
2022	12	12
2023	7	7
Thereafter	42	42
Total lease payments	122	108
Less: Interest	(22)	(22)
Total lease liabilities	100	86
Total
Remainder of 2019	127	97
2020	428	197
2021	212	79
2022	141	54
2023	101	35
Thereafter	353	178
Total lease payments	1,362	640
Less: Interest	(123)	(66)
Total lease liabilities	$ 1,239	$ 574
Weighted average lease term, operating lease	5 years 3 months 18 days
Weighted average discount rate, operating lease	2.79%
Weighted average lease term, finance lease	6 years 4 months 24 days
Weighted average discount rate, finance lease	4.92%