Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment loss recognized		$ 873.3
Amortization expense	$ 29.5	$ 27.5
Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets	10 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets	20 years
Weighted average
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets	13 years 8 months