Comprehensive Income (Loss) (Components of accumulated comprehensive loss) (Details) (USD $) In Millions, unless otherwise specified			3 Months Ended				6 Months Ended				3 Months Ended				6 Months Ended				3 Months Ended				6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 Cumulative Translation Adjustment		Jun. 30, 2012 Cumulative Translation Adjustment		Jun. 30, 2013 Cumulative Translation Adjustment		Jun. 30, 2012 Cumulative Translation Adjustment		Jun. 30, 2013 Pension and Postretirement Benefits		Jun. 30, 2012 Pension and Postretirement Benefits		Jun. 30, 2013 Pension and Postretirement Benefits		Jun. 30, 2012 Pension and Postretirement Benefits		Jun. 30, 2013 Accumulated Other Comprehensive Loss		Jun. 30, 2012 Accumulated Other Comprehensive Loss		Jun. 30, 2013 Accumulated Other Comprehensive Loss		Jun. 30, 2012 Accumulated Other Comprehensive Loss
Increase (Decrease) in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ (9.3)	$ (6.8)	$ 3.2		$ 6.1		$ 5.4		$ 4.8		$ (11.8)		$ (13.1)		$ (12.2)		$ (13.2)		$ (8.6)		$ (7.0)		$ (6.8)		$ (8.4)
Foreign currency translation adjustments			(0.7)	[1]	(2.9)	[1]	(2.9)	[1]	(1.6)	[1]	0	[1]	0	[1]	0	[1]	0	[1]	(0.7)	[1]	(2.9)	[1]	(2.9)	[1]	(1.6)	[1]
Recognition of actuarial loss			0	[2]	0	[2]	0	[2]	0	[2]	(0.3)	[2]	(0.6)	[2]	(0.7)	[2]	(0.7)	[2]	(0.3)	[2]	(0.6)	[2]	0.7	[2]	(0.7)	[2]
Tax adjustment			0	[3]	0	[3]	0	[3]	0	[3]	0.3	[3]	0	[3]	0.3	[3]	0	[3]	0.3	[3]	0	[3]	(0.3)	[3]	0	[3]
Recognition of actuarial loss, net			0		0		0		0		0		(0.6)		(0.4)		(0.7)		0		(0.6)		0.4		(0.7)
Beginning balance	$ (9.3)	$ (6.8)	$ 2.5		$ 3.2		$ 2.5		$ 3.2		$ (11.8)		$ (12.5)		$ (11.8)		$ (12.5)		$ (9.3)		$ (9.3)		$ (9.3)		$ (9.3)

[1] income taxes are provided on foreign currency translation adjustments as foreign earnings are considered permanently invested.

[2] The recognition of actuarial losses are reclassified out of accumulated other comprehensive income and included in the computation of net periodic benefit cost in selling, general and administrative expenses.

[3] The tax adjustments are reclassified out of accumulated other comprehensive income and included in income tax expenses.