Accrued Expenses and Other Liabilities and Other Long-Term Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Accrued expenses and other liabilities
Self-insurance accruals	$ 42	$ 35
Accrued compensation and benefit costs	128	55
Property and income taxes payable	25	23
Restructuring reserves	33	17
Interest payable	131	79
Deferred revenue	46	40
National accounts accrual	50	40
Other	81	55
Accrued expenses and other liabilities	536	344
Other long-term liabilities
Self-insurance accruals	58	59
Property and income taxes payable	52	0
Accrued compensation and benefit costs	10	8
Other long-term liabilities	$ 120	$ 67