Restructuring Costs and Other - Reserve (Details) - USD ($) $ in Millions		3 Months Ended			9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2018	Sep. 30, 2017
Restructuring Reserve [Roll Forward]
Beginning Accrued Restructuring Balance 1/1/18					$ 20.9
Pre-tax Restructuring Costs		$ 2.4	$ 3.3		3.1	$ 13.5
Utilization and Foreign Exchange					(7.7)
Ending Accrued Restructuring Balance 9/30/2018		16.3			16.3
Withdrawal from multi-employer pension plan
Restructuring Reserve [Roll Forward]
Pre-tax Restructuring Costs				$ 12.5
2018 Restructuring Actions
Restructuring Reserve [Roll Forward]
Beginning Accrued Restructuring Balance 1/1/18					0.0
Pre-tax Restructuring Costs					3.7
Utilization and Foreign Exchange					(2.6)
Ending Accrued Restructuring Balance 9/30/2018		1.1			1.1
2018 Restructuring Actions | Severance
Restructuring Reserve [Roll Forward]
Beginning Accrued Restructuring Balance 1/1/18					0.0
Pre-tax Restructuring Costs					2.2
Utilization and Foreign Exchange					(1.1)
Ending Accrued Restructuring Balance 9/30/2018		1.1			1.1
2018 Restructuring Actions | Asset write-downs
Restructuring Reserve [Roll Forward]
Beginning Accrued Restructuring Balance 1/1/18					0.0
Pre-tax Restructuring Costs					0.0
Utilization and Foreign Exchange					0.0
Ending Accrued Restructuring Balance 9/30/2018		0.0			0.0
2018 Restructuring Actions | Facility closure and other costs
Restructuring Reserve [Roll Forward]
Beginning Accrued Restructuring Balance 1/1/18					0.0
Pre-tax Restructuring Costs					1.5
Utilization and Foreign Exchange					(1.5)
Ending Accrued Restructuring Balance 9/30/2018		0.0			0.0
2018 Restructuring Actions | Withdrawal from multi-employer pension plan
Restructuring Reserve [Roll Forward]
Ending Accrued Restructuring Balance 9/30/2018		12.5			12.5
2017 and Prior Restructuring Actions
Restructuring Reserve [Roll Forward]
Beginning Accrued Restructuring Balance 1/1/18					20.9
Pre-tax Restructuring Costs					(0.6)
Utilization and Foreign Exchange					(5.1)
Ending Accrued Restructuring Balance 9/30/2018		15.2			15.2
2017 and Prior Restructuring Actions | Severance
Restructuring Reserve [Roll Forward]
Beginning Accrued Restructuring Balance 1/1/18					5.4
Pre-tax Restructuring Costs					(1.9)
Utilization and Foreign Exchange					(2.1)
Ending Accrued Restructuring Balance 9/30/2018		1.4			1.4
2017 and Prior Restructuring Actions | Asset write-downs
Restructuring Reserve [Roll Forward]
Beginning Accrued Restructuring Balance 1/1/18					0.0
Pre-tax Restructuring Costs					0.0
Utilization and Foreign Exchange					0.0
Ending Accrued Restructuring Balance 9/30/2018		0.0			0.0
2017 and Prior Restructuring Actions | Facility closure and other costs
Restructuring Reserve [Roll Forward]
Beginning Accrued Restructuring Balance 1/1/18	[1]				15.5
Pre-tax Restructuring Costs	[1]				1.3
Utilization and Foreign Exchange	[1]				(3.0)
Ending Accrued Restructuring Balance 9/30/2018	[1]	$ 13.8			$ 13.8

[1] Facility closure and other costs as of 9/30/18 include a liability of approximately $12.5 million associated with the withdrawal from a multi-employer pension plan as a result of a restructuring action.