Postretirement Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Interest Cost	$ 7.8	$ 8.0
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	10.3	9.7
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0.4	0.3
Net periodic benefit cost	1.5	6.5
Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Interest Cost	1.8	2.3
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	0.9	1.4
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(0.4)	(0.2)
Net periodic benefit cost	0.5	0.7
Foreign Plan [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Interest Cost	1.9	1.8
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	3.0	2.7
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0.0	0.0
Net periodic benefit cost	(0.7)	(0.5)
Domestic Plan [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Interest Cost	5.9	6.2
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	7.3	7.0
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0.4	0.3
Net periodic benefit cost	$ 2.2	$ 7.0