New Accounting Pronouncements - Narrative (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Deferred tax assets non-current	$ 178.2	$ 234.1
Unamortized debt issuance cost	25.6	30.5
Accounting Standards Update Two Zero One Five Hyphen One Seven
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Deferred tax assets non-current	38.5
Prepaid Expenses and Other Current Assets | Accounting Standards Update Two Zero One Five Hyphen One Seven
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Deferred tax assets, current		41.6
Long Term Debt | Accounting Standards Update 2015-03
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Unamortized debt issuance cost	$ 25.6	$ 30.5