Accounts Payable and Other Current Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Payables and Accruals [Abstract]
Compensation and benefits payable	$ 751	$ 913
Operating leases - current	455
Accounts payable	413	169
Property and income tax liabilities	391	382
Accrued interest	280	270
Customer incentives	231	231
Capital expenditure estimated liabilities	120	188
Casualty and environmental liabilities	115	120
Rents and leases	86	117
Other	792	871
Total	$ 3,634	$ 3,261