Accumulated Other Comprehensive Loss, Net of Tax Reclassification of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Reclassification of Accumulated Other Comprehensive Income [Abstract]
Foreign currency translation adjustments		$ 14.9	$ 0.0	$ 13.7	$ (0.9)
Losses on derivative instruments		0.5	0.5	1.5	1.4
Amortization of defined benefit pension and postretirement plans items	[1]	1.1	2.6	7.5	7.6
Tax effect		(3.3)	(1.5)	(6.0)	(2.9)
Total amount reclassified from accumulated other comprehensive loss, net of tax		$ 13.2	$ 1.6	$ 16.7	$ 5.2

[1] These accumulated other comprehensive loss components are included in the computation of net periodic cost. See Note 10 for further information.