Consolidated Statements Of Comprehensive Income (Unaudited) (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Other comprehensive income (loss):
Income tax expense (benefit) on translation adjustments on net investment hedge	$ (6.7)	$ (3.4)	$ (2.9)	$ 2.4
Income tax expense (benefit) on unrealized gain (loss) on investments	(0.8)	0.5	(0.8)	1.0
Income tax expense on adjustment to defined benefit pension plans and retiree health care plan	$ 0.3	$ 0.2	$ 1.3	$ 0.3