Restructuring Costs - Reserve (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Reserve [Roll Forward]
Beginning accrued restructuring balance	$ 21.0
Pre-tax Restructuring Costs	32.0	$ 12.0	$ 20.3
Utilization and Foreign Exchange	(35.6)
Ending accrued restructuring balance	17.4	21.0
2019 Restructuring Actions
Restructuring Reserve [Roll Forward]
Beginning accrued restructuring balance	0.0
Pre-tax Restructuring Costs	29.1
Utilization and Foreign Exchange	(20.7)
Ending accrued restructuring balance	8.4	0.0
2018 and Prior Restructuring Actions
Restructuring Reserve [Roll Forward]
Beginning accrued restructuring balance	21.0
Pre-tax Restructuring Costs	2.9
Utilization and Foreign Exchange	(14.9)
Ending accrued restructuring balance	9.0	21.0
Severance | 2019 Restructuring Actions
Restructuring Reserve [Roll Forward]
Beginning accrued restructuring balance	0.0
Pre-tax Restructuring Costs	16.6
Utilization and Foreign Exchange	(8.3)
Ending accrued restructuring balance	8.3	0.0
Severance | 2018 and Prior Restructuring Actions
Restructuring Reserve [Roll Forward]
Beginning accrued restructuring balance	7.7
Pre-tax Restructuring Costs	0.3
Utilization and Foreign Exchange	(5.0)
Ending accrued restructuring balance	3.0	7.7
Asset write-downs | 2019 Restructuring Actions
Restructuring Reserve [Roll Forward]
Beginning accrued restructuring balance	0.0
Pre-tax Restructuring Costs	4.8
Utilization and Foreign Exchange	(4.8)
Ending accrued restructuring balance	0.0	0.0
Asset write-downs | 2018 and Prior Restructuring Actions
Restructuring Reserve [Roll Forward]
Beginning accrued restructuring balance	0.0
Pre-tax Restructuring Costs	0.3
Utilization and Foreign Exchange	(0.3)
Ending accrued restructuring balance	0.0	0.0
Facility closure and other costs | 2019 Restructuring Actions
Restructuring Reserve [Roll Forward]
Beginning accrued restructuring balance	0.0
Pre-tax Restructuring Costs	7.7
Utilization and Foreign Exchange	(7.6)
Ending accrued restructuring balance	0.1	0.0
Facility closure and other costs | 2018 and Prior Restructuring Actions
Restructuring Reserve [Roll Forward]
Beginning accrued restructuring balance	13.3
Pre-tax Restructuring Costs	2.3
Utilization and Foreign Exchange	(9.6)
Ending accrued restructuring balance	$ 6.0	$ 13.3