Accumulated Other Comprehensive Income (Loss) (Components of accumulated comprehensive loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Increase (Decrease) in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			$ (14.0)
Ending balance	$ (17.1)		(17.1)
Cumulative Translation Adjustment [Member]
Increase (Decrease) in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(7.7)	$ 3.8	(5.1)	$ 2.8
Foreign currency translation adjustments	(0.9)	(4.9)	(3.5)	(3.9)
Recognition of actuarial loss	0.0	0.0	0.0	0.0
Ending balance	(8.6)	(1.1)	(8.6)	(1.1)
Pension and Postretirement Benefits [Member]
Increase (Decrease) in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(8.6)	0.6	(8.9)	0.6
Foreign currency translation adjustments	0.0	0.0	0.0	0.0
Recognition of actuarial loss	0.1	0.1	0.4	0.1
Ending balance	(8.5)	0.7	(8.5)	0.7
Accumulated Other Comprehensive Income [Member]
Increase (Decrease) in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(16.3)	4.4	(14.0)	3.4
Foreign currency translation adjustments	(0.9)	(4.9)	(3.5)	(3.9)
Recognition of actuarial loss	0.1	0.1	0.4	0.1
Ending balance	$ (17.1)	$ (0.4)	$ (17.1)	$ (0.4)