Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Accumulated other comprehensive loss, net of tax
Foreign currency translation	$ 13.9		$ 13.9		$ 80.5
Pension and other postretirement liability adjustment, net of deferred tax effect	(185.0)		(185.0)		(193.4)
Accumulated other comprehensive loss	(171.1)		(171.1)		(112.9)
Tax effect of pension liability adjustment	115.6		115.6		120.9
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax	6.6		13.7
Other comprehensive income, before reclassification, foreign currency translation			(66.6)
Other comprehensive income, before reclassification, pension			0
Other comprehensive income, reclassification adjustment, foreign currency translation			0
Other comprehensive income, reclassification, pension	4.2		8.4
Translation adjustments	(75.0)	(94.1)	(66.6)	(58.2)
Pension and other postretirement liability adjustments, net of tax	4.2	4.7	8.4	11.2
Other comprehensive loss	(70.8)	(89.4)	(58.2)	(47.1)
Before reclassification [Member]
Accumulated other comprehensive loss, net of tax
Other comprehensive loss			(66.6)
Reclassified [Member]
Accumulated other comprehensive loss, net of tax
Other comprehensive loss			$ 8.4