Income Tax (Tables)

12 Months Ended

Dec. 31, 2011

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

Total income tax expense (benefit) is allocated as follows:

	Year Ended December 31
	2011			2010			2009
	(in millions of dollars)
Net Income	$	21.8		$	445.2		$	439.7
Stockholders' Equity - Additional Paid-in Capital
Stock-Based Compensation	(3.3		)	(2.7		)	1.5
Stockholders' Equity - Accumulated Other Comprehensive Income (Loss)
Change in Net Unrealized Gains on Securities Not
Other-Than Temporarily Impaired	799.4			519.1			1,454.9
Change in Net Unrealized Gains and Losses on Securities
Other-Than Temporarily Impaired	(1.1		)	(0.5		)	1.6
Change in Net Gain on Cash Flow Hedges	25.2			(5.0		)	(45.3		)
Change in Adjustment to Reserves for Future Policy and Contract
Benefits, Net of Reinsurance and Other	(703.3		)	(501.0		)	(816.6		)
Change in Foreign Currency Translation Adjustment	—			0.6			—
Change in Unrecognized Pension and Postretirement Benefit Costs	(67.4		)	(12.7		)	42.0
Stockholders' Equity - Retained Earnings
Adoption of ASC 320 Update - Note 1	—			—			7.7
Total	$	71.3		$	443.0		$	1,085.5

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

A reconciliation of the income tax expense (benefit) attributable to income from operations before income tax, computed at U.S. federal statutory tax rates, to the income tax expense (benefit) as included in our consolidated statements of income, is as follows. Certain prior year amounts have been reclassified to conform to current year reporting.

	Year Ended December 31
	2011		2010		2009
Statutory Income Tax	35.0	%	35.0	%	35.0	%
Prior Year Tax Settlements	(14.5	)	0.5		0.3
Foreign Items	(0.6	)	(1.3	)	(0.8	)
Tax Credits	(7.6	)	(0.6	)	—
Other Items, Net	(3.8	)	(0.2	)	(0.5	)
Effective Tax	8.5	%	33.4	%	34.0	%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

Our deferred income tax asset and liability consists of the following:

	December 31
	2011		2010
	(in millions of dollars)
Deferred Tax Liability
Deferred Acquisition Costs	$	257.0	$	328.4
Unrealized Gains and Losses	507.8		392.7
Other	138.2		200.6
Gross Deferred Tax Liability	903.0		921.7
Deferred Tax Asset
Invested Assets	349.8		317.8
Employee Benefits	262.3		174.2
Other	29.7		16.6
Gross Deferred Tax Asset	641.8		508.6
Less Valuation Allowance	—		4.1
Net Deferred Tax Asset	641.8		504.5
Total Net Deferred Tax Liability	$	261.2	$	417.2

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

Our consolidated statements of income include amounts subject to both domestic and foreign taxation. The income and related tax expense (benefit) are as follows:

	Year Ended December 31
	2011			2010			2009
	(in millions of dollars)
Income Before Tax
United States - Federal	$	83.2		$	1,124.7		$	1,065.2
Foreign	174.0			206.6			227.1
Total	$	257.2		$	1,331.3		$	1,292.3
Current Tax Expense
United States - Federal	$	218.4		$	246.9		$	283.7
Foreign	12.1			54.1			94.2
Total	230.5			301.0			377.9
Deferred Tax Expense (Benefit)
United States - Federal	(230.5		)	148.5			91.4
Foreign	21.8			(4.3		)	(29.6		)
Total	(208.7		)	144.2			61.8
Total	$	21.8		$	445.2		$	439.7

Summary of Positions for which Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Table Text Block]

Our consolidated statements of income include the following changes in unrecognized tax benefits:

	December 31
	2011			2010			2009
	(in millions of dollars)
Balance at Beginning of Year	$	138.9		$	146.8		$	149.8
Tax Positions Related to Prior Years
Additions	4.4			3.6			8.5
Subtractions	(11.8		)	(11.5		)	(11.5		)
Settlements with Tax Authorities	(44.6		)	—			—
Balance at End of Year	86.9			138.9			146.8
Less Tax Attributable to Temporary Items Included Above	(86.9		)	(123.7		)	(131.6		)
Total Unrecognized Tax Benefits that if Recognized Would Affect the Effective Tax Rate	$	—		$	15.2		$	15.2