Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2012
Accumulated other comprehensive loss, net of tax
Foreign currency translation	$ 2.0	$ 88.9	$ (8.0)	$ 80.5
Pension and other postretirement liability adjustment, net of deferred tax effect	(89.4)	(189.2)	(90.7)	(193.4)
Accumulated other comprehensive loss	(87.4)	(100.3)	(98.7)	(112.9)
Tax effect of pension liability adjustment	54.9		55.6
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax		7.1
Other comprehensive income, before reclassification, foreign currency translation	10.0	8.4
Other comprehensive income, before reclassification, pension	0	0
Other comprehensive income, reclassification adjustment, foreign currency translation	0	0
Other comprehensive income, reclassification, pension	1.3	4.2
Translation adjustments	10.0	8.4
Pension and other postretirement liability adjustments, net of tax	1.3	4.2
Other comprehensive income (loss)	11.3	12.6
Before reclassification [Member]
Accumulated other comprehensive loss, net of tax
Other comprehensive income (loss)	10.0	8.4
Reclassified [Member]
Accumulated other comprehensive loss, net of tax
Other comprehensive income (loss)	1.3	4.2
Pension Costs [Member]
Accumulated other comprehensive loss, net of tax
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax	4.2
Other comprehensive income, reclassification, pension	2.6
OPEB [Member]
Accumulated other comprehensive loss, net of tax
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax	2.2
Other comprehensive income, reclassification, pension	$ 1.3