Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Standard Product Warranty Accrual	$ 13.3	$ 14.1	$ 13.3	$ 11.7	$ 9.8
Expense for environmental remediation		3.2	23.3	4.4
Reserves for environmental matters	30.6	28.9	30.6
Reserve for environmental matters, current	6.1	12.6	6.1
Total rental expense		35.5	32.5	30.3
Minimum lease payments, due in current year		20.5
Minimum lease payments, due in second year		17.9
Minimum lease payments, due in third year		13.0
Minimum lease payments, due in fourth year		8.0
Minimum lease payments, due in fifth year		4.0
Standard Product Warranty Accrual, Decrease for Payments		7.8	6.5	5.4
Accruals for warranties issued during the current period		9.0	8.1	7.1
Standard Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties		(0.8)	0.2	0.5
Standard Product Warranty Accrual, Foreign Currency Translation Gain (Loss)		0.4	(0.2)	$ (0.3)
Segment, Discontinued Operations [Member]
Reserves for environmental matters	9.6	$ 8.9	$ 9.6
Remediation costs associated with new proactive remediation approach [Domain]
Expense for environmental remediation	$ 15.0