Goodwill and Other Intangible Assets - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2017 USD ($)	Dec. 31, 2017	Dec. 31, 2017 segment	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Finite-Lived Intangible Assets [Line Items]
Number of regional segments			3	3
Amortization expense		$ 31.2			$ 31.2	$ 31.4
Estimated useful lives (in years)	10 years
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives (in years)	11 years
Patents
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives (in years)	13 years
Other intangibles
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives (in years)	6 years