Restructuring Costs - Reserve (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restructuring Reserve [Roll Forward]
Beginning accrued restructuring balance 1/1/16		$ 7.8
Pre-tax restructuring costs		35.0	$ 23.6	$ 5.1
Utilization and foreign exchange		(18.3)
Ending accrued restructuring balance 12/31/2016	$ 24.5	24.5	7.8
2016 Restructuring Actions
Restructuring Reserve [Roll Forward]
Beginning accrued restructuring balance 1/1/16		0.0
Pre-tax restructuring costs		31.8
Utilization and foreign exchange		(8.5)
Ending accrued restructuring balance 12/31/2016	23.3	23.3	0.0
2015 Restructuring Actions
Restructuring Reserve [Roll Forward]
Beginning accrued restructuring balance 1/1/16		7.8
Pre-tax restructuring costs		3.2
Utilization and foreign exchange		(9.8)
Ending accrued restructuring balance 12/31/2016	1.2	1.2	7.8
Severance | 2016 Restructuring Actions
Restructuring Reserve [Roll Forward]
Beginning accrued restructuring balance 1/1/16		0.0
Pre-tax restructuring costs		13.8
Utilization and foreign exchange		(4.4)
Ending accrued restructuring balance 12/31/2016	9.4	9.4	0.0
Severance | 2015 Restructuring Actions
Restructuring Reserve [Roll Forward]
Beginning accrued restructuring balance 1/1/16		7.4
Pre-tax restructuring costs		0.6
Utilization and foreign exchange		(7.0)
Ending accrued restructuring balance 12/31/2016	1.0	1.0	7.4
Asset write-downs | 2016 Restructuring Actions
Restructuring Reserve [Roll Forward]
Beginning accrued restructuring balance 1/1/16		0.0
Pre-tax restructuring costs		2.9
Utilization and foreign exchange		(2.9)
Ending accrued restructuring balance 12/31/2016	0.0	0.0	0.0
Asset write-downs | 2015 Restructuring Actions
Restructuring Reserve [Roll Forward]
Beginning accrued restructuring balance 1/1/16		0.0
Pre-tax restructuring costs		0.1
Utilization and foreign exchange		(0.1)
Ending accrued restructuring balance 12/31/2016	0.0	0.0	0.0
Facility closure and other costs | 2016 Restructuring Actions
Restructuring Reserve [Roll Forward]
Beginning accrued restructuring balance 1/1/16		0.0
Pre-tax restructuring costs		15.1
Utilization and foreign exchange		(1.2)
Ending accrued restructuring balance 12/31/2016	13.9	13.9	0.0
Facility closure and other costs | 2015 Restructuring Actions
Restructuring Reserve [Roll Forward]
Beginning accrued restructuring balance 1/1/16		0.4
Pre-tax restructuring costs		2.5
Utilization and foreign exchange		(2.7)
Ending accrued restructuring balance 12/31/2016	0.2	0.2	$ 0.4
Withdrawal from Multiemployer Defined Benefit Plan
Restructuring Reserve [Roll Forward]
Pre-tax restructuring costs	$ 12.5
Withdrawal from Multiemployer Defined Benefit Plan | 2016 Restructuring Actions
Restructuring Reserve [Roll Forward]
Pre-tax restructuring costs		$ 12.5