Accounts Payable And Other Current Liabilities (Schedule Of Accounts Payable And Other Current Liabilities) (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Payables and Accruals [Abstract]
Accounts payable	$ 365	$ 309
Accrued sales and use taxes	204	198
Accrued payroll and related	244	148
Public liability and property damage insurance liabilities - current	133	132
Deferred income - current	95	60
Advertising and marketing	85	82
Income taxes payable - current	85	58
Other	469	434
Accounts payable and other current liabilities	$ 1,680	$ 1,421