Defined Benefit Pension Plans (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2018
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 1.1	$ 1.4
Interest cost	2.9	3.2
Expected return on plan assets	(3.4)	(3.3)
Amortization of prior service cost 1	0.1	0.2
Amortization of net loss 1	1.6	1.4
Net periodic pension cost	2.3	2.9
Net periodic pension cost included in cost of sales	0.7	0.9
Net periodic pension cost included in selling, general, and administrative expenses	0.4	0.4
Net periodic pension cost included in other non-operating items	1.2	$ 1.6
Pension Contributions	$ 0.7
Minimum [Member] | Scenario, Forecast [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year			$ 10.0
Maximum [Member] | Scenario, Forecast [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year			$ 12.0