Accumulated Other Comprehensive Loss, Net of Tax Reclassification of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Reclassification of Accumulated Other Comprehensive Income [Abstract]
Foreign currency translation adjustments		$ (0.7)	$ 0.0	$ (1.2)	$ (0.9)
Losses on derivative instruments		0.5	0.5	1.0	0.9
Amortization of defined benefit pension and postretirement plans items	[1]	3.4	2.4	6.4	5.0
Tax effect		(1.3)	(0.9)	(2.7)	(1.4)
Total amount reclassified from accumulated other comprehensive loss, net of tax		$ 1.9	$ 2.0	$ 3.5	$ 3.6

[1] These accumulated other comprehensive loss components are included in the computation of net periodic cost. See Note 9 for further information.