Defined Benefit Pension Plans (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017		Sep. 30, 2016	Dec. 31, 2017
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 1.4	$ 1.2	$ 4.1		$ 3.6
Interest cost	3.3	3.3	9.7		10.1
Expected return on plan assets	(3.3)	(3.3)	(9.8)		(10.0)
Amortization of prior service cost 1	0.2	0.1	0.6	[1]	0.3
Amortization of net loss 1	1.4	1.4	4.2	[1]	4.1
Net periodic pension cost	$ 3.0	$ 2.7	8.8		$ 8.1
Payment for Pension Benefits			$ 12.8
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						$ 1.0
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						$ 2.0

[1] The amounts reclassified from accumulated other comprehensive income (loss) are included in the computation of net periodic pension cost; see Note 12 for additional details. The net periodic pension cost is included in Cost of sales and Selling and administrative expense in the Consolidated Statements of Income.