Schedule of Accounts Payable and Other Current Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Accounts Payable and Other Current Liabilities [Abstract]
Accounts payable	$ 394	$ 378
Accrued sales and use taxes	215	223
Employee-related Liabilities, Current	117	195
Accrued marketing and commissions, current	122	191
Public liability and property damage insurance liabilities – current	162	178
Other	510	562
Accounts payable and other current liabilities	$ 2,034	$ 2,206