Accumulated Other Comprehensive Income (Loss) (Components of accumulated comprehensive loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Increase (Decrease) in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			$ (14.0)
Ending balance	$ (16.3)		(16.3)
Cumulative Translation Adjustment [Member]
Increase (Decrease) in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(10.4)	$ 2.4	(5.1)	$ 2.8
Foreign currency translation adjustments	2.7	1.4	(2.6)	1.0
Recognition of actuarial loss	0.0	0.0	0.0	0.0
Tax adjustment		0.0		0.0
Ending balance	(7.7)	3.8	(7.7)	3.8
Pension and Postretirement Benefits [Member]
Increase (Decrease) in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(8.7)	0.5	(8.9)	0.6
Foreign currency translation adjustments	0.0	0.0	0.0	0.0
Recognition of actuarial loss	0.1	0.0	0.3	(0.1)
Tax adjustment		0.1		0.1
Ending balance	(8.6)	0.6	(8.6)	0.6
Accumulated Other Comprehensive Income [Member]
Increase (Decrease) in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(19.1)	2.9	(14.0)	3.4
Foreign currency translation adjustments	2.7	1.4	(2.6)	1.0
Recognition of actuarial loss	0.1	0.0	0.3	(0.1)
Tax adjustment		0.1		0.1
Ending balance	$ (16.3)	$ 4.4	$ (16.3)	$ 4.4