Accrued Expenses and Other Current Liabilities - Summary of Accrued Expenses and Other Current Liabilities (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Payables And Accruals [Abstract]
Accrued commissions and incentives	$ 257	$ 211
Customer prepayments	86	56
Accrued payroll and related	61	71
Accrued interest expense	49	61
Deferred revenue	29	29
Income tax payable	26	24
Accrued sponsor monitoring fee	26	32
Derivative contracts	6	4
Pension and post-retirement benefit liabilities	2	2
Other	20	47
Accrued expenses and other current liabilities	$ 562	$ 537