Accrued Expenses and Other Liabilities and Other Long-Term Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Accrued expenses and other liabilities
Self-insurance accruals	$ 54	$ 59
Accrued compensation and benefit costs	79	86
Property and income taxes payable	45	26
Restructuring reserves	19	20
Interest payable	133	142
Deferred revenue	51	55
National accounts accrual	84	87
Operating lease liability	178	178
Other	77	94
Accrued expenses and other liabilities	720	747
Other long-term liabilities
Self-insurance accruals	73	62
Income taxes payable	5	14
Accrued compensation and benefit costs	60	15
Other long-term liabilities	$ 138	$ 91