Long-Term Debt - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest Expense [Member]
Debt Instrument [Line Items]
Amortization of deferred financing costs	$ 26.8	$ 9.7	$ 8.9
2014 Term Loan Facility [Member]
Debt Instrument [Line Items]
Debt instrument unamortized discount	43.2	67.2
Deferred financing costs	131.3	104.1
2015 Senior Notes [Member]
Debt Instrument [Line Items]
Deferred financing costs	9.0
2014 Senior Notes [Member]
Debt Instrument [Line Items]
Deferred financing costs	$ 40.8	$ 46.0