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Other Comprehensive Income and Accumulated Other Comprehensive Income (Tables) | 6 Months Ended
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Jun. 30, 2013
Statement of Other Comprehensive Income [Abstract] |
Schedule of Comprehensive Income [Table Text Block] | The components of Other Comprehensive Income Tax Benefit (Expense) for the six and three months ended June 30, 2013 and 2012 were:
|  | Six Months Ended |  | Three Months Ended
(Dollars in Millions) |  | Jun 30, 2013 |  | Jun 30, 2012 |  | Jun 30, 2013 |  | Jun 30, 2012
Other Comprehensive Income Tax Benefit (Expense): |  |  |  |  |  |  |  |
Unrealized Holding (Gains) Losses Arising During the Period Before Reclassification Adjustment |  | $ | 92.2 |  |  | $ | (29.0 | ) |  | $ | 82.6 |  |  | $ | (27.2 | )
Reclassification Adjustment for Amounts Included in Net Income |  | 8.8 |  |  | 2.8 |  |  | 0.4 |  |  | 1.4 |
Unrealized Holding (Gains) Losses |  | 101.0 |  |  | (26.2 | ) |  | 83.0 |  |  | (25.8 | )
Foreign Currency Translation Adjustment |  | — |  |  | (0.4 | ) |  | (0.1 | ) |  | (0.1 | )
Amortization of Unrecognized Postretirement Benefit Costs |  | (4.2 | ) |  | (2.7 | ) |  | (2.3 | ) |  | (1.1 | )
Other Comprehensive Income Tax Benefit (Expense) |  | $ | 96.8 |  |  | $ | (29.3 | ) |  | $ | 80.6 |  |  | $ | (27.0 | )
The components of Other Comprehensive Income (Loss) Before Income Taxes for the six and three months ended June 30, 2013 and 2012 were:
|  | Six Months Ended |  | Three Months Ended
(Dollars in Millions) |  | Jun 30, 2013 |  | Jun 30, 2012 |  | Jun 30, 2013 |  | Jun 30, 2012
Other Comprehensive Income (Loss) Before Income Taxes: |  |  |  |  |  |  |  |
Unrealized Holding Gains (Losses) Arising During the Period Before Reclassification Adjustment |  | $ | (257.7 | ) |  | $ | 81.9 |  |  | $ | (233.8 | ) |  | $ | 76.7 |
Reclassification Adjustment for Amounts Included in Net Income |  | (25.3 | ) |  | (8.0 | ) |  | (1.2 | ) |  | (4.1 | )
Unrealized Holding Gains (Losses) |  | (283.0 | ) |  | 73.9 |  |  | (235.0 | ) |  | 72.6 |
Foreign Currency Translation Adjustments |  | (0.1 | ) |  | 1.3 |  |  | 0.1 |  |  | 0.6 |
Amortization of Unrecognized Postretirement Benefit Costs |  | 12.1 |  |  | 7.6 |  |  | 6.7 |  |  | 3.2 |
Other Comprehensive Income (Loss) Before Income Taxes |  | $ | (271.0 | ) |  | $ | 82.8 |  |  | $ | (228.2 | ) |  | $ | 76.4 |
Schedule of Accumulated Other Comprehensive Income [Table Text Block] | The components of Accumulated Other Comprehensive Income (“AOCI”) at June 30, 2013 and December 31, 2012 were:
(Dollars in Millions) |  | Jun 30, 2013 |  | Dec 31, 2012
Unrealized Gains (Losses) on Investments, Net of Income Taxes: |  |  |  |
Available for Sale Fixed Maturities with Portion of OTTI Recognized in Earnings |  | $ | (0.1 | ) |  | $ | 1.4 |
Other Unrealized Gains on Investments |  | 227.6 |  |  | 408.1 |
Foreign Currency Translation Adjustments, Net of Income Taxes |  | 0.6 |  |  | 0.7 |
Net Unrecognized Postretirement Benefit Costs, Net of Income Taxes |  | (89.6 | ) |  | (97.5 | )
Accumulated Other Comprehensive Income |  | $ | 138.5 |  |  | $ | 312.7 |
Reclassification out of Accumulated Comprehensive Income [Table Text Block] | Components of AOCI were reclassified to the following lines of the Condensed Consolidated Statements of Income for the six and three months ended June 30, 2013 and 2012:
|  | Six Months Ended |  | Three Months Ended
(Dollars in Millions) |  | Jun 30, 2013 |  | Jun 30, 2012 |  | Jun 30, 2013 |  | Jun 30, 2012
Reclassification of AOCI from Unrealized Gains and Losses on Available For Sale Securities to: |  |  |  |  |  |  |  |
Net Realized Gains on Sales of Investments |  | $ | 28.2 |  |  | $ | 8.9 |  |  | $ | 2.2 |  |  | $ | 4.5 |
Net Impairment Losses Recognized in Earnings |  | (2.9 | ) |  | (0.9 | ) |  | (1.0 | ) |  | (0.4 | )
Total Before Income Taxes |  | 25.3 |  |  | 8.0 |  |  | 1.2 |  |  | 4.1 |
Income Tax Expense |  | (8.8 | ) |  | (2.8 | ) |  | (0.4 | ) |  | (1.4 | )
Reclassification from AOCI, Net of Income Taxes |  | 16.5 |  |  | 5.2 |  |  | 0.8 |  |  | 2.7 |
Reclassification of AOCI from Amortization of Unrecognized Postretirement Benefit Costs to: |  |  |  |  |  |  |  |
Interest and Other Expenses |  | (12.1 | ) |  | (7.6 | ) |  | (6.7 | ) |  | (3.2 | )
Income Tax Benefit |  | 4.2 |  |  | 2.7 |  |  | 2.3 |  |  | 1.1 |
Reclassification from AOCI, Net of Income Taxes |  | (7.9 | ) |  | (4.9 | ) |  | (4.4 | ) |  | (2.1 | )
Total Reclassification from AOCI to Net Income |  | $ | 8.6 |  |  | $ | 0.3 |  |  | $ | (3.6 | ) |  | $ | 0.6 |

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=20435746&loc=SL7669686-108580 + Details
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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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