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Consolidated Statements Of Comprehensive Income (Loss) (Unaudited) (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Other comprehensive income (loss):
Income tax expense (benefit) on translation adjustments on net investment hedge	$ (3.4)	$ 20.9	$ 2.4	$ 0
Income tax expense (benefit) on unrealized gain (loss) on investments	0.5	(0.2)	1.0	(0.3)
Income tax expense on amortization of net loss included in net periodic benefit cost	$ 0.2	$ 0.1	$ 0.3	$ 0.4

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Tax effect of the income statement impact of the reclassification adjustment for actuarial gain (loss) recognized as a component of net periodic benefit cost.

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-Publisher FASB

-Name Accounting Standards Codification

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Tax effect of unrealized holding gain (loss) before reclassification adjustments and transfers on available-for-sale securities.

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-Name Accounting Research Bulletin (ARB)

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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Tax effect of current period adjustment resulting from gains and losses on foreign currency transactions that are designated as, and are effective as, economic hedges of a net investment in a foreign entity.

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