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Income Tax (Tables) | 12 Months Ended
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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 |

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 740 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph -Name Accounting Standards Codification -Paragraph 9 -Section 50 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 740 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 740 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph -Name Accounting Standards Codification -Paragraph 12 -Section 50 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 + Details
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- Definition Tabular disclosure of income before income tax between domestic and foreign jurisdictions. + References No definition available. + Details
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- Definition Tabular disclosure of unrecognized tax benefits for which a material change is reasonably possible in the next twelve months, typically including the nature of the uncertainty, the event(s) that could cause a material change, and an estimate of the range of the reasonably possible change or a statement that an estimate of the range cannot be made. An unrecognized tax benefit is the difference between a tax position taken in a tax return and the amounts recognized in the financial statements for which it is more likely than not, based on the technical merits of the position, that the tax position will not be sustained upon examination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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