Goodwill and Other Intangibles, Net - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Amortization expense of intangible assets	$ 9.7	$ 7.6	$ 20.4	$ 15.2
Estimated amortization expense, 2015	40.0		40.0
Estimated amortization expense, 2016	38.0		38.0
Estimated amortization expense, 2017	38.0		38.0
Estimated amortization expense, 2018	38.0		38.0
Estimated amortization expense, 2019	38.0		38.0
Estimated amortization expense, 2020	$ 38.0		$ 38.0