Net Periodic Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan, Net Periodic Benefit Cost
Settlement and curtailment (gains) losses	$ (0.0)	$ 1.0	$ (6.8)
Domestic Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost
Service cost	0.0	0.0	0.0
Interest cost	4.8	4.5	5.1
Expected return on plan assets	(5.9)	(6.6)	(6.2)
Settlement and curtailment (gains) losses	(0.0)	(0.0)	(0.0)
Amortization of:
Prior service cost (credit)	0.0	0.0	0.0
Net actuarial losses	1.9	1.6	1.5
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 0.8	$ (0.5)	$ 0.4
Discount rate	4.35%	3.70%	4.20%
Expected return on plan assets	7.00%	7.00%	7.00%
Interest crediting rate	5.10%	5.10%	5.10%
Discount rate	3.35%	4.35%	3.70%
Interest crediting rate	5.10%	5.10%	5.10%
Foreign Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost
Service cost	$ 4.8	$ 5.4	$ 4.9
Interest cost	12.4	13.1	13.5
Expected return on plan assets	(17.4)	(18.8)	(17.7)
Settlement and curtailment (gains) losses	(0.0)	(1.0)	6.8
Amortization of:
Prior service cost (credit)	0.1	0.1	0.1
Net actuarial losses	4.8	5.9	5.5
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 4.7	$ 4.7	$ 13.1
Discount rate	2.61%	2.36%	2.52%
Rate of compensation increase	2.58%	2.37%	2.36%
Expected return on plan assets	4.76%	4.70%	4.66%
Interest crediting rate	1.44%	1.31%	1.29%
Discount rate	1.84%	2.61%	2.36%
Rate of compensation increase	2.51%	2.58%	2.37%
Interest crediting rate	1.37%	1.44%	1.31%
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost
Service cost	$ 0.0	$ 0.0	$ 0.0
Interest cost	1.2	1.1	1.3
Expected return on plan assets	(0.0)	(0.0)	(0.0)
Settlement and curtailment (gains) losses	(0.0)	(0.0)	(0.0)
Amortization of:
Prior service cost (credit)	(0.2)	(0.2)	(0.2)
Net actuarial losses	0.1	0.1	(0.0)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 1.1	$ 1.0	$ 1.1
Discount rate	4.30%	3.65%	4.05%
Discount rate	3.25%	4.30%	3.65%
Health care cost trend rate assumed for next year	7.00%	6.25%	6.50%
Year ultimate rate is reached	2028	2024	2024
Ultimate rate	5.00%	5.00%	5.00%