Schedule of Accounts Payable and Other Current Liabilities (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Accounts Payable And Accrued Liabilities Current And Noncurrent [Line Items]
Accounts payable	$ 309	$ 312
Accrued payroll and related	198	200
Accrued sales and use taxes	148	173
Public liability and property damage insurance liabilities - current	132	128
Income taxes payable - current	58	109
Advertising and marketing	82	77
Other	494	434
Accounts payable and other current liabilities	$ 1,421	$ 1,433