Other Comprehensive Income (Tables)

9 Months Ended

Sep. 30, 2011

Other Comprehensive Income [Abstract]

Reconciliation Of Gross Unrealized Investment Gains

	Three Months Ended September 30,
	2011							2010
(in millions)	Pre-Tax		Tax Benefit (Expense)			Net of Tax		Pre-Tax		Tax Benefit (Expense)			Net of Tax
Unrealized gains on available-for- sale securities:
Unrealized gains arising during period	$	15.4	$	7.8		$	23.2	$	110.8	$	(26.4	)	$	84.4
Less: reclassification adjustments for gains realized in net income		8.4		(1.9	)		6.5		9.4		(0.5	)		8.9
Total available-for-sale securities		7.0		9.7			16.7		101.4		(25.9	)		75.5
Unrealized losses on derivative instruments:
Unrealized losses arising during period		0.1		(0.1	)		—		—		—			—
Other comprehensive income	$	7.1	$	9.6		$	16.7	$	101.4	$	(25.9	)	$	75.5

	Nine Months Ended September 30,
	2011								2010
(in millions)	Pre-Tax			Tax Benefit (Expense)		Net of Tax			Pre-Tax		Tax Benefit (Expense)			Net of Tax
Unrealized gains on available-for- sale securities:
Unrealized gains arising during period	$	74.6		$	12.9	$	87.5		$	245.8	$	(58.1	)	$	187.7
Less: reclassification adjustments for gains realized in net income		24.7			2.4		27.1			18.7		(0.7	)		18.0
Total available-for-sale securities		49.9			10.5		60.4			227.1		(57.4	)		169.7
Unrealized losses on derivative instruments:
Unrealized losses arising during period		(1.8	)		0.6		(1.2	)		—		—			—
Other comprehensive income	$	48.1		$	11.1	$	59.2		$	227.1	$	(57.4	)	$	169.7