Accumulated Other Comprehensive Loss (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012		Jun. 30, 2011	Jun. 30, 2012 Accumulated Translation Adjustment [Member]	Jun. 30, 2012 Actuarial Loss Gain on Post Retirement Benefits [Member]	Jun. 30, 2012 Prior Service Cost on Post Retirement Benefits [Member]	Dec. 31, 2011 Prior Service Cost on Post Retirement Benefits [Member]
Beginning Balance			$ (200.9)			$ 24.8	$ (225.6)	$ (0.1)	$ (0.1)
Currency translation adjustment, net of tax	1.0	1.1	2.2		0.2	2.2
Amortization of pension related costs, net of tax of $0.5	1.9	0.9	5.7		1.8		5.7
Other comprehensive income	2.9	2.0	7.9	[1]	2.0	2.2	5.7
Ending Balance	$ (193.0)		$ (193.0)			$ 27.0	$ (219.9)	$ (0.1)	$ (0.1)

[1] (b) See Note 7, "Accumulated Other Comprehensive Loss," in this Form 10-Q regarding the changes in the accumulated balances for each component of accumulated other comprehensive income during the first six months of 2012.