Accounts Payable and Other Current Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Accounts Payable and Accrued Liabilities, Current [Abstract]
Short-term operating lease liabilities	$ 495	$ 514
Accounts payable	446	394
Deferred lease revenues – current	335	70
Accrued sales and use taxes	260	215
Accrued advertising and marketing	182	122
Accrued payroll and related	175	117
Public liability and property damage insurance liabilities – current	167	162
Other	386	440
Accounts payable and other current liabilities	$ 2,446	$ 2,034