Comprehensive Income (Components Of Comprehensive Income) (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Comprehensive Income
Net income	$ 90.7	$ 80.6	$ 183.6	$ 60.0
Foreign currency translation	(68.3)	51.2	(20.6)	0.3
Derivative financial instruments	9.1	(9.7)	6.8	(1.0)
Accrued benefit costs	0.8	0.6	5.3	1.0
Unrealized gain (loss) on investment	(0.3)	1.2	(0.3)	0.2
Comprehensive income	$ 32.0	$ 123.9	$ 174.8	$ 60.5