Goodwill and Other Intangible Assets - Narrative (Details) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($) segment	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Goodwill [Line Items]
Document Period End Date		Dec. 31, 2017
Finite-Lived Intangible Assets, Gross		$ 733.7	$ 575.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net				$ 213.6
Payments to Acquire Businesses, Net of Cash Acquired		346.8	72.6	213.3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			27.9
Goodwill, Acquired During Period		$ 149.7	30.6
Document Fiscal Year Focus		2017
Finite-Lived Intangible Assets, Accumulated Amortization		$ 373.8	$ 332.9
Finite-Lived Intangible Asset, Useful Life		20 years	20 years
Finite-Lived Intangible Assets, Remaining Amortization Period		16 years 9 months 18 days	19 years 1 month 6 days
Goodwill and Other Intangible Assets (Textual) [Abstract]
Amortization expense for intangible assets		$ 40.0	$ 36.2	$ 36.2
Future Amortization Expense Year 2016		41.4
Future Amortization Expense Year 2017		35.5
Future Amortization Expense Year 2018		30.9
Future Amortization Expense Year 2019		27.2
Future Amortization Expense Year 2020		23.1
2016 Acquisitions [Member]
Goodwill [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net			72.6
PT Tech & TCP Acquisitions [Member]
Goodwill [Line Items]
Goodwill, Acquired During Period		14.1
Lovejoy [Member]
Goodwill [Line Items]
Goodwill, Purchase Accounting Adjustments		1.7
Groeneveld [Member]
Goodwill [Line Items]
Goodwill, Acquired During Period		136.7
2017 Acquisitions [Member]
Goodwill [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net		346.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		$ 173.6
Intangible Assets, Weighted Average Life		15 years
EDT [Member]
Goodwill [Line Items]
Goodwill, Purchase Accounting Adjustments	$ 0.6
Lovejoy & EDT [Member]
Goodwill [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net			27.9
Mobile Industries [Member]
Goodwill [Line Items]
Number of Reporting Units | segment		4
Goodwill, Acquired During Period		$ 150.8	0.7
Process Industries [Member]
Goodwill [Line Items]
Number of Reporting Units | segment		2
Goodwill, Acquired During Period		$ (1.1)	$ 29.9