Consolidated Statements Of Comprehensive Income (Unaudited) (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Other comprehensive income:
Income tax expense (benefit) on translation adjustments on net investment hedge	$ (3.6)	$ 12.9	$ 3.8	$ 5.8
Income tax expense (benefit) on unrealized gain (loss) on investments	(0.4)	(0.3)	0	0.5
Income tax expense on adjustment to defined benefit pension plans and retiree health care plan	$ 1.0	$ 0	$ 1.0	$ 0.1