Net Periodic Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Domestic Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost
Service cost	$ 0.0	$ 0.0	$ 0.0
Interest cost	4.5	5.1	5.9
Expected return on plan assets	(6.6)	(6.2)	(6.6)
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	1.6	1.5	1.3
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ (0.5)	$ 0.4	$ 0.6
Discount rate	3.70%	4.20%	4.80%
Expected return on plan assets	7.00%	7.00%	7.00%
Interest crediting rate	5.10%	5.10%	5.10%
Discount rate	4.35%	3.70%	4.20%
Interest crediting rate	5.10%	5.10%	5.10%
Foreign Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost
Service cost	$ 5.4	$ 4.9	$ 6.7
Interest cost	13.1	13.5	15.1
Expected return on plan assets	(18.8)	(17.7)	(18.7)
Settlement and curtailment (gains) losses	(1.0)	6.8	0.4
Amortization of:
Prior service cost (credit)	0.1	0.1	0.1
Net actuarial losses	5.9	5.5	4.2
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 4.7	$ 13.1	$ 7.8
Discount rate	2.36%	2.52%	3.61%
Rate of compensation increase	2.37%	2.36%	3.18%
Expected return on plan assets	4.70%	4.66%	5.38%
Interest crediting rate	1.31%	1.29%	1.35%
Discount rate	2.61%	2.36%	2.52%
Rate of compensation increase	2.58%	2.37%	2.36%
Interest crediting rate	1.44%	1.31%	1.29%
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost
Service cost	$ 0.0	$ 0.0	$ 0.0
Interest cost	1.1	1.3	1.5
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	0.0	0.0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 1.0	$ 1.1	$ 1.3
Discount rate	3.65%	4.05%	4.65%
Discount rate	4.30%	3.65%	4.05%
Health care cost trend rate assumed for next year	6.25%	6.50%	6.75%
Year ultimate rate is reached	2024	2024	2024
Ultimate rate	5.00%	5.00%	5.00%