Consolidated Statements Of Comprehensive (Loss) Income (Unaudited) (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Other comprehensive (loss) income:
Income tax expense (benefit) on translation adjustments on net investment hedge	$ 7.4	$ (7.1)
Income tax expense on unrealized gain on investments	0.4	0.8
Income tax expense on amortization of net loss included in net periodic benefit cost	$ 0	$ 0.1