Accounts Payable and Other Current Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Accounts Payable and Other Current Liabilities [Abstract]
Short-term operating lease liabilities	$ 501	$ 479
Accounts payable	404	378
Accrued sales and use taxes	249	223
Accrued advertising and marketing	145	191
Accrued payroll and related	131	195
Public liability and property damage insurance liabilities – current	179	178
Other	538	562
Accounts payable and other current liabilities	$ 2,147	$ 2,206