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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (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
Statement of Other Comprehensive Income [Abstract]
Unrealized gain (loss) on available-for-sale securities, tax	$ 1.5	$ 0	$ 2.4	$ 0
Net gain reclassified into income on sale of available-for-sale securities, tax	(2.4)	0	(2.4)	0
Change in fair value of interest rate swap, tax	(0.1)	(0.1)	0	(0.3)
Net loss reclassified into income on settlement of interest rate swap, tax	$ 0.1	$ 0.1	$ 0.2	$ 0.2

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- Definition

Tax effect, net of reclassification adjustments, of the change in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Also includes an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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