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Accumulated Other Comprehensive Income (Tables) | 3 Months Ended
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Mar. 31, 2013
Notes to Financial Statements [Abstract] |
Schedule of Comprehensive Income (Loss) [Table Text Block] | After-tax accumulated other comprehensive income (loss) balances and related changes are as follows:
|  |  | Net Unrealized Gain on Securities |  | Net Gain on Cash Flow Hedges |  | Foreign Currency Translation Adjustment |  | Unrecognized Pension and Postretirement Benefit Costs |  | Total
|  |  | (in millions of dollars)
Balance at December 31, 2012 |  | $ | 873.5 |  |  | $ | 401.6 |  |  | $ | (72.6 | ) |  | $ | (574.5 | ) |  | $ | 628.0 |
| Other Comprehensive Income (Loss) Before Reclassifications |  | (73.3 | ) |  | (1.2 | ) |  | (69.9 | ) |  | 1.7 |  |  | (142.7 | )
| Amounts Reclassified from Accumulated Other Comprehensive Income or Loss |  | (7.8 | ) |  | (0.8 | ) |  | — |  |  | 9.0 |  |  | 0.4 |
| Net Other Comprehensive Income (Loss) |  | (81.1 | ) |  | (2.0 | ) |  | (69.9 | ) |  | 10.7 |  |  | (142.3 | )
Balance at March 31, 2013 |  | $ | 792.4 |  |  | $ | 399.6 |  |  | $ | (142.5 | ) |  | $ | (563.8 | ) |  | $ | 485.7 |
Schedule of Net Unrealized Gain on Securities [Table Text Block] | The net unrealized gain on securities consists of the following components:
|  |  |  | March 31 |  | December 31 |  |
|  |  |  | 2013 |  | 2012 |  | Change
|  |  |  | (in millions of dollars)
Fixed Maturity Securities |  | $ | 6,803.9 |  |  | $ | 7,221.5 |  |  | $ | (417.6 | )
Other Investments |  | 72.5 |  |  | 92.8 |  |  | (20.3 | )
Deferred Acquisition Costs |  | (61.2 | ) |  | (67.0 | ) |  | 5.8 |
Reserves for Future Policy and Contract Benefits |  | (5,979.7 | ) |  | (6,277.5 | ) |  | 297.8 |
Reinsurance Recoverable |  | 353.9 |  |  | 351.5 |  |  | 2.4 |
Deferred Income Tax |  | (397.0 | ) |  | (447.8 | ) |  | 50.8 |
Total |  | $ | 792.4 |  |  | $ | 873.5 |  |  | $ | (81.1 | )
Schedule of Reclassifications from Accumulated Other Comprehensive Income to Income [Table Text Block] | Amounts reclassified from accumulated other comprehensive income were recognized in our consolidated statements of income as follows:
|  |  |  | Three Months Ended March 31, 2013
|  |  |  | (in millions of dollars)
Net Unrealized Gain on Securities |  |
| Net Realized Investment Gain |  |
|  | Gain on Disposals of Securities and Other Invested Assets |  | $ | 11.9 |
| Income Tax |  | 4.1 |
| Total |  | $ | 7.8 |
Net Gain on Cash Flow Hedges |  |
| Net Investment Income |  |
|  | Gain on Interest Rate Swaps and Forwards |  | $ | 10.0 |
|  | Loss on Foreign Exchange Contracts |  | (1.7 | )
| Net Realized Investment Gain |  |
|  | Loss on Foreign Exchange Contracts |  | (6.7 | )
| Interest and Debt Expense |  |
|  | Loss on Interest Rate Swaps |  | (0.4 | )
|  |  |  | 1.2 |
| Income Tax |  | 0.4 |
| Total |  | $ | 0.8 |
Unrecognized Pension and Postretirement Benefit Costs |  |
| Other Expenses |  |
|  | Amortization of Net Actuarial Loss |  | $ | (14.9 | )
|  | Amortization of Prior Service Credit |  | 1.2 |
|  |  |  | (13.7 | )
| Income Tax Benefit |  | (4.7 | )
| Total |  | $ | (9.0 | )

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- Definition Tabular disclosure of components of comprehensive income (loss) including, but not limited to: (a) foreign currency translation adjustments; (b) gains (losses) on foreign currency transactions that are designated as, and are effective as, economic hedges of a net investment in a foreign entity; (c) gains (losses) on intercompany foreign currency transactions that are of a long-term-investment nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements; (d) change in the market value of a futures contract that qualifies as a hedge of an asset reported at fair value; (e) unrealized holding gains (losses) on available-for-sale securities and that resulting from transfers of debt securities from the held-to-maturity category to the available-for-sale category; (f) a net loss recognized as an additional pension liability not yet recognized as net periodic pension cost; and (g) the net gain (loss) and net prior service cost or credit for pension plans and other postretirement benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e526-108580 + Details
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