Benefit Plans, Reconciliation of Changes in Benefit Obligations and Fair Value of Plan Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Reconciliation of Fair Value of Plan Assets [Roll Forward]
Beginning balance	$ 301.8
Fair value of plan assets ending balance	269.9	$ 301.8
Pension Benefits [Member] | U.S. Plans [Member]
Reconciliation of Benefit Obligations [Roll Forward]
Beginning balance	59.7	59.7
Service cost	0.0	0.0	$ 0.0
Interest cost	2.1	2.3	2.5
Plan amendments	0.0	0.0
Actuarial (gains) losses	0.4	2.0
Benefit payments	(2.9)	(2.8)
Plan settlements	(1.9)	(1.5)
Effect of foreign currency exchange rate changes	0.0	0.0
Benefit obligations ending balance	57.4	59.7	59.7
Reconciliation of Fair Value of Plan Assets [Roll Forward]
Beginning balance	63.1	59.3
Actual return on plan assets	(0.7)	8.0
Employer contributions	0.1	0.1
Plan settlements	(1.9)	(1.5)
Benefit payments	(2.9)	(2.8)
Effect of foreign currency exchange rate changes	0.0	0.0
Fair value of plan assets ending balance	57.7	63.1	59.3
Funded Status as of Period End	0.3	3.4
Pension Benefits [Member] | Non-U.S. Plans [Member]
Reconciliation of Benefit Obligations [Roll Forward]
Beginning balance	335.9	323.7
Service cost	1.8	1.9	1.6
Interest cost	7.5	7.8	8.8
Plan amendments	3.6	0.0
Actuarial (gains) losses	(16.8)	(22.5)
Benefit payments	(10.2)	(9.1)
Plan settlements	0.0	0.0
Effect of foreign currency exchange rate changes	(16.9)	34.1
Benefit obligations ending balance	304.9	335.9	323.7
Reconciliation of Fair Value of Plan Assets [Roll Forward]
Beginning balance	238.7	202.9
Actual return on plan assets	(8.1)	17.9
Employer contributions	4.2	5.7
Plan settlements	0.0	0.0
Benefit payments	(10.2)	(9.1)
Effect of foreign currency exchange rate changes	(12.4)	21.3
Fair value of plan assets ending balance	212.2	238.7	202.9
Funded Status as of Period End	(92.7)	(97.2)
Other Postretirement Benefits [Member]
Reconciliation of Benefit Obligations [Roll Forward]
Beginning balance	3.4	3.2
Service cost	0.0	0.0	0.0
Interest cost	0.1	0.1	0.2
Plan amendments	0.0	0.0
Actuarial (gains) losses	(0.1)	0.2
Benefit payments	(0.2)	(0.2)
Plan settlements	0.0	0.0
Effect of foreign currency exchange rate changes	(0.1)	0.1
Benefit obligations ending balance	3.1	3.4	$ 3.2
Reconciliation of Fair Value of Plan Assets [Roll Forward]
Funded Status as of Period End	$ (3.1)	$ (3.4)