Accounts Payable and Other Current Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Accounts Payable and Other Current Liabilities [Abstract]
Short-term operating lease liabilities	$ 513	$ 479
Accounts payable	389	378
Accrued sales and use taxes	201	223
Accrued advertising and marketing	128	191
Accrued payroll and related	132	195
Public liability and property damage insurance liabilities – current	177	178
Other	432	437
Accounts payable and other current liabilities	2,084	2,206
Deferred Revenue, Current	$ 112	$ 125