Pension and Postretirement Benefit Obligation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Benefit Obligation [Roll Forward]
Domestic Pension Plan Discount Rate	2.60%	3.35%
Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets (Period Start)	$ 508.6
Fair Value of Plan Assets (Period End)	$ 562.5	$ 508.6
Pension plans with underfunded or unfunded accumulated benefit obligation
Foreign Pension Plan Discount Rate	1.35%	1.84%
Domestic Plan [Member]
Benefit Obligation [Roll Forward]
Benefit obligation (period start)	$ 116.9	$ 115.4
Service cost	0.0	0.0	$ 0.0
Interest cost	3.7	4.8	4.5
Benefits Paid	(10.1)	(9.2)
Plan participant contributions	0.0	0.0
Actuarial losses (gains)	6.3	5.9
Settlements and curtailments	0.0	0.0
Foreign currency effect	0.0	0.0
Other	0.0	0.0
Benefit Obligation (Period End)	116.8	116.9	115.4
Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets (Period Start)	99.1	89.8
Actual return on plan assets	10.6	16.1
Plan participant contributions	0.0	0.0
Employer contributions	1.3	2.4
Benefits paid	(10.1)	(9.2)
Settlements	0.0	0.0
Foreign currency effect	0.0	0.0
Fair Value of Plan Assets (Period End)	100.9	99.1	$ 89.8
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(15.9)	(17.8)
Amounts Recognized in Consolidated Balance Sheets
Non-current asset	0.0	0.0
Current liability	0.0	0.0
Non-current liability	(15.9)	(17.8)
Net liability recognized	(15.9)	(17.8)
Accumulated benefit obligation	116.8	116.9
Amounts recognized in Accumulated Other Comprehensive Loss, net
Net actuarial loss	53.9	54.2
Prior service cost (credit)	0.0	0.0
Total amount recognized	53.9	54.2
Pension plans with underfunded or unfunded accumulated benefit obligation
Aggregate projected benefit obligation	116.8	116.9
Aggregate accumulated benefit obligation	116.8	116.9
Aggregate fair value of plan assets	$ 100.9	$ 99.1
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.60%	3.35%	4.35%
Foreign Plan [Member]
Benefit Obligation [Roll Forward]
Benefit obligation (period start)	$ 541.2	$ 496.0
Service cost	4.9	4.8	$ 5.4
Interest cost	9.4	12.4	13.1
Benefits Paid	(22.9)	(27.8)
Plan participant contributions	0.0	0.0
Actuarial losses (gains)	54.3	42.7
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	(4.9)	(0.7)
Foreign currency effect	23.3	13.8
Other	0.6	0.0
Benefit Obligation (Period End)	605.9	541.2	496.0
Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets (Period Start)	409.5	363.9
Actual return on plan assets	45.7	42.0
Plan participant contributions	0.0	0.0
Employer contributions	18.4	18.0
Benefits paid	(22.9)	(27.8)
Settlements	(4.9)	0.0
Foreign currency effect	15.8	13.4
Fair Value of Plan Assets (Period End)	461.6	409.5	$ 363.9
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(144.3)	(131.7)
Amounts Recognized in Consolidated Balance Sheets
Non-current asset	10.9	10.1
Current liability	(7.4)	(5.8)
Non-current liability	(147.8)	(136.0)
Net liability recognized	(144.3)	(131.7)
Accumulated benefit obligation	603.3	538.6
Amounts recognized in Accumulated Other Comprehensive Loss, net
Net actuarial loss	213.3	183.2
Prior service cost (credit)	1.1	1.1
Total amount recognized	214.4	184.3
Pension plans with underfunded or unfunded accumulated benefit obligation
Aggregate projected benefit obligation	600.8	534.6
Aggregate accumulated benefit obligation	600.1	533.5
Aggregate fair value of plan assets	$ 445.6	$ 392.7
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	1.35%	1.84%	2.61%
Other Postretirement Benefits Plan [Member]
Benefit Obligation [Roll Forward]
Benefit obligation (period start)	$ 27.2	$ 27.7
Service cost	0.0	0.0	$ 0.0
Interest cost	0.8	1.2	1.1
Benefits Paid	(5.2)	(5.4)
Plan participant contributions	2.1	2.0
Actuarial losses (gains)	0.9	1.7
Settlements and curtailments	0.0	0.0
Foreign currency effect	0.0	0.0
Other	0.0	0.0
Benefit Obligation (Period End)	25.8	27.2	27.7
Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets (Period Start)	0.0	0.0
Actual return on plan assets	0.0	0.0
Plan participant contributions	2.1	2.0
Employer contributions	3.1	3.4
Benefits paid	(5.2)	(5.4)
Settlements	0.0	0.0
Foreign currency effect	0.0	0.0
Fair Value of Plan Assets (Period End)	0.0	0.0	$ 0.0
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(25.8)	(27.2)
Amounts Recognized in Consolidated Balance Sheets
Non-current asset	0.0	0.0
Current liability	(2.5)	(2.7)
Non-current liability	(23.3)	(24.5)
Net liability recognized	(25.8)	(27.2)
Amounts recognized in Accumulated Other Comprehensive Loss, net
Net actuarial loss	5.4	4.7
Prior service cost (credit)	0.0	(0.1)
Total amount recognized	$ 5.4	$ 4.6
Pension plans with underfunded or unfunded accumulated benefit obligation
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.50%	3.25%	4.30%