Acquisitions And Divestitures (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended			12 Months Ended
	Dec. 31, 2017	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Intangible asset useful life					15 years 10 months
Business Combination, Integration Related Costs		$ 4.7	$ 0.5	$ 2.6	$ 0.0	$ 0.0	$ 7.2
Restructuring charges					13.0	0.0	7.8
Goodwill	$ 1,206.9	$ 1,206.9			1,206.9	1,149.2	1,167.9
Goodwill, Acquired During Period					$ 31.5
Portion of noncontrolling interest sold	70.00%
Noncontrolling Interest, Ownership Percentage by Parent	4.90%	4.90%			4.90%
Proceeds from Noncontrolling Interests					$ 14.1
Deconsolidation, Gain (Loss), Amount					1.0	$ 0.0	$ 0.0
deconsolidation after-tax gain					0.7
Deconsolidation, Revaluation of Retained Investment, Gain (Loss), Amount					0.9
Noncontrolling Interest in Joint Ventures	$ 2.3	$ 2.3			$ 2.3
cost of capital					10.00%
Westlock [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross					$ 40.0
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period					32.0
Goodwill, Acquired During Period					22.6
Business Acquisition, Transaction Costs	2.0	2.0			2.0
Microtronic [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross					18.0
Goodwill, Acquired During Period					8.9
Business Acquisition, Transaction Costs	$ 1.0	$ 1.0			$ 1.0
Customer relationships [Member]
Business Acquisition [Line Items]
Intangible asset useful life					15 years 7 months 6 days