Accrued Expenses and Other Current Liabilities - Summary of Accrued Expenses and Other Current Liabilities (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Payables And Accruals [Abstract]
Accrued commissions and incentives	$ 308	$ 253
Accrued interest expense	87	73
Customer prepayments	63	44
Accrued payroll and related	61	80
Deferred revenue	39	30
Accrued sponsor monitoring fees	23	26
Income tax payable	14	15
Pension and post-retirement benefit liabilities	1	1
Derivative contracts		1
Other	20	17
Accrued expenses and other current liabilities	$ 616	$ 540