Accounts Payable and Other Current Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Accounts Payable and Other Current Liablities [Line Items]
Compensation and benefits payable	$ 776	$ 776
Property and income tax liabilities	497	337
Accounts payable	487	292
Accrued interest	300	286
Capital expenditure estimated liabilities	202	317
Customer incentives	149	135
Casualty and environmental liabilities	125	135
Rents and leases	117	111
Other	785	855
Total	$ 3,438	$ 3,244