Accrued Expenses and Other Current Liabilities - Summary of Accrued Expenses and Other Current Liabilities (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Payables And Accruals [Abstract]
Accrued commissions and incentives	$ 298	$ 253
Accrued interest expense	62	73
Accrued payroll and related	62	80
Customer prepayments	35	44
Deferred revenue	29	30
Accrued sponsor monitoring fee	23	26
Income tax payable	16	15
Pension and post-retirement benefit liabilities	1	1
Derivative contracts		1
Other	29	17
Accrued expenses and other current liabilities	$ 555	$ 540