Other Comprehensive Income (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	Mar. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income [Line Items]
Foreign Currency Translation Adjustment, Net of Tax	$ (14.7)		$ (14.7)		$ (5.7)	$ (7.6)
Pension and Other Postretirement Benefit Plans, Net of Tax	(96.0)		(96.0)		(97.6)	(99.0)
Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	(0.3)		(0.3)		(0.3)	(0.3)
Available-for-sale Securities Adjustment, Net of Tax	2.2		2.2		1.3	1.0
Other, Net of Tax	(2.0)		(2.0)		(2.0)	(2.0)
Accumulated comprehensive loss	(110.8)		(110.8)		(104.3)	(107.9)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0	0.1	0.1	0.2
Defined Benefit Plan, Amortization of Gains (Losses)	1.9	1.7	3.7	3.4
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Transition Asset (Obligation), Recognized in Net Periodic Benefit Cost, before Tax	0		(0.1)
Defined Benefit Plan, Net Periodic Benefit Cost	1.9	2.1	3.7	4.2
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Transition Asset (Obligation), Recognized in Net Periodic Benefit Cost, Tax	0.5		1.0
Foreign currency translation adjustments	(9.0)	(5.9)	(7.1)	(1.2)
Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	3.0		5.7
Unrealized gain on marketable securities, net of reversals	0.9	0	1.2	0.2
Other Comprehensive Income, Other, Net of Tax	(5.1)		(0.2)
Pension and Other Postretirement Benefit Plans, Net Prior Service Costs Arising During Period, Net of Tax	(1.4)		(2.7)
Other comprehensive income (loss), net of tax	(6.5)	(4.6)	(2.9)	0.8
Defined benefit pension plans	1.6	1.3	3.0	2.0
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Net of Tax	$ 1.4		$ 2.7