Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Accumulated other comprehensive income (loss)
Beginning Balance, Foreign Currency Translation Gain (Loss)	$ 46.0	$ 74.4	$ 56.1
Beginning Balance, Unrealized Gain (Loss) on Securities	(0.4)	(1.7)	(1.6)
Beginning Balance, Unrealized Loss on Derivative Instruments	(55.7)	(52.2)	(47.4)
Beginning Balance, Post-Retirement Benefit Plans	(99.9)	(105.0)	(92.3)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	(110.0)	(84.5)	(85.2)
Change in Foreign Currency Translation Gain (Loss)	(41.2)	(28.4)	18.3
Change in Unrealized Gain (Loss) on Securities	(1.2)	1.4	(0.1)
Change in Unrealized Loss on Derivative Instruments	(6.6)	(12.2)	(8.6)
Change in Post-Retirement Benefit Plans	(36.0)	3.7	(21.3)
Other Comprehensive Income Change in Component	(85.0)	(35.5)	(11.7)
Foreign currency translation gain loss before reclassification adjustment into earnings	1.6
Unrealized Gain (Loss) on Securities, Reclassification adjustments into earnings	0.9
Unrealized Loss on Derivative Instruments, Reclassification adjustments into earnings	4.0	9.2	8.0
Post-Retirement Benefit Plans, Reclassification adjustments into earnings	5.8	4.5	1.2
Reclassification adjustments into earnings, Total	12.3	13.7	9.2
Unrealized Gain (Loss) on Securities, Income tax effect	0.1	(0.1)
Unrealized Loss on Derivative Instruments, Income tax effect	2.1	(0.5)	(4.2)
Post-Retirement Benefit Plans, Income tax effect	11.4	(3.1)	7.4
Income tax effect, Total	13.6	(3.7)	3.2
Ending Balance, Foreign Currency Translation Gain (Loss)	6.4	46.0	74.4
Ending Balance, Unrealized Gain (Loss) on Securities	(0.6)	(0.4)	(1.7)
Ending Balance, Unrealized Loss on Derivative Instruments	(56.2)	(55.7)	(52.2)
Ending Balance, Post-Retirement Benefit Plans	(118.7)	(99.9)	(105.0)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	$ (169.1)	$ (110.0)	$ (84.5)