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Schedule III Supplementary Insurance Information | 12 Months Ended
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Dec. 31, 2012
Schedule III - Supplementary Insurance Info [Abstract] |
Supplementary Insurance Information, for Insurance Companies Disclosure [Text Block] | SCHEDULE III--SUPPLEMENTARY INSURANCE INFORMATION Unum Group and Subsidiaries
Segment | Deferred Acquisition Costs |  | Reserves for Future Policy Contract Benefits |  | Unearned Premiums |  | Policy and Contract Benefits
| (in millions of dollars)
December 31, 2011 |  |  |  |  |  |  |
Unum US | $ | 1,392.3 |  |  | $ | 12,280.2 |  |  | $ | 43.4 |  |  | $ | 889.2 |
Unum UK | 59.4 |  |  | 2,172.5 |  |  | 143.2 |  |  | 135.6 |
Colonial Life | 849.2 |  |  | 1,598.1 |  |  | 28.5 |  |  | 134.7 |
Closed Block | — |  |  | 27,001.1 |  |  | 218.1 |  |  | 334.5 |
Total | $ | 2,300.9 |  |  | $ | 43,051.9 |  |  | $ | 433.2 |  |  | $ | 1,494.0 |
December 31, 2010 |  |  |  |  |  |  |
Unum US | $ | 1,362.2 |  |  | $ | 11,799.2 |  |  | $ | 39.6 |  |  | $ | 910.8 |
Unum UK | 58.2 |  |  | 2,053.9 |  |  | 141.2 |  |  | 141.6 |
Colonial Life | 805.0 |  |  | 1,507.2 |  |  | 26.8 |  |  | 118.4 |
Closed Block | 295.7 |  |  | 24,354.7 |  |  | 229.1 |  |  | 394.2 |
Total | $ | 2,521.1 |  |  | $ | 39,715.0 |  |  | $ | 436.7 |  |  | $ | 1,565.0 |
SCHEDULE III--SUPPLEMENTARY INSURANCE INFORMATION Unum Group and Subsidiaries (continued from preceding page)
Segment | Premium Income |  | Net Investment Income (1) |  | Benefits and Change in Reserves for Future Benefits (2) |  | Amortization of Deferred Acquisition Costs |  | All Other Expenses (3) |  | Premiums Written (4)
| (in millions of dollars)
December 31, 2011 |  |  |  |  |  |  |  |  |  |  |
Unum US | $ | 4,296.0 |  |  | $ | 951.4 |  |  | $ | 3,113.5 |  |  | $ | 298.7 |  |  | $ | 1,137.0 |  |  | $ | 2,965.8 |
Unum UK | 687.6 |  |  | 189.9 |  |  | 493.8 |  |  | 29.2 |  |  | 162.8 |  |  | 480.0 |
Colonial Life | 1,135.3 |  |  | 132.4 |  |  | 589.4 |  |  | 189.0 |  |  | 207.7 |  |  | 944.9 |
Closed Block | 1,395.3 |  |  | 1,189.7 |  |  | 3,012.8 |  |  | 16.9 |  |  | 582.9 |  |  | 1,385.1 |
Corporate | — |  |  | 56.2 |  |  | — |  |  | — |  |  | 187.1 |  |  | — |
Total | $ | 7,514.2 |  |  | $ | 2,519.6 |  |  | $ | 7,209.5 |  |  | $ | 533.8 |  |  | $ | 2,277.5 |  |  |
December 31, 2010 |  |  |  |  |  |  |  |  |  |  |
Unum US | $ | 4,255.4 |  |  | $ | 941.5 |  |  | $ | 3,124.4 |  |  | $ | 307.9 |  |  | $ | 1,118.3 |  |  | $ | 2,938.9 |
Unum UK | 650.6 |  |  | 170.5 |  |  | 435.8 |  |  | 27.0 |  |  | 150.7 |  |  | 469.4 |
Colonial Life | 1,075.7 |  |  | 122.5 |  |  | 534.7 |  |  | 187.2 |  |  | 194.8 |  |  | 901.9 |
Closed Block | 1,449.7 |  |  | 1,166.4 |  |  | 2,259.2 |  |  | 25.0 |  |  | 327.9 |  |  | 1,430.4 |
Corporate | — |  |  | 94.6 |  |  | — |  |  | — |  |  | 169.0 |  |  | — |
Total | $ | 7,431.4 |  |  | $ | 2,495.5 |  |  | $ | 6,354.1 |  |  | $ | 547.1 |  |  | $ | 1,960.7 |  |  |
December 31, 2009 |  |  |  |  |  |  |  |  |  |  |
Unum US | $ | 4,278.4 |  |  | $ | 934.3 |  |  | $ | 3,192.1 |  |  | $ | 293.8 |  |  | $ | 1,128.0 |  |  | $ | 2,997.0 |
Unum UK | 686.1 |  |  | 124.5 |  |  | 373.6 |  |  | 30.5 |  |  | 159.3 |  |  | 508.6 |
Colonial Life | 1,015.1 |  |  | 114.3 |  |  | 480.6 |  |  | 178.5 |  |  | 189.9 |  |  | 851.5 |
Closed Block | 1,495.9 |  |  | 1,106.8 |  |  | 2,245.3 |  |  | 23.4 |  |  | 340.7 |  |  | 1,484.0 |
Corporate | — |  |  | 66.7 |  |  | — |  |  | — |  |  | 163.0 |  |  | — |
Total | $ | 7,475.5 |  |  | $ | 2,346.6 |  |  | $ | 6,291.6 |  |  | $ | 526.2 |  |  | $ | 1,980.9 |  |  |
(1) | Net investment income is allocated based upon segmentation. Each segment has its own specifically identified assets and receives the investment income generated by those assets.
(2) | Included in 2011 in the Closed Block segment is a reserve charge of $573.6 million related to our long-term care business and a reserve charge of $183.5 million related to our individual disability business.
(3) | Includes commissions, interest and debt expense, deferral of acquisition costs, compensation expense, and other expenses. Also included in 2011 in the Closed Block segment is an impairment charge of $289.8 million related to long-term care deferred policy acquisition costs. Where not directly attributable to a segment, expenses are generally allocated based on activity levels, time information, and usage statistics.
(4) | Excludes life insurance.
Prior period segment results have been restated to reflect changes in reporting classifications. See Note 12 of the "Notes to Consolidated Financial Statements" contained herein in Item 8.

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- Definition The entire disclosure for required supplementary insurance information giving segment detail in support of various balance sheet and income statement captions. The balance sheet information generally is presented as of the date of each audited balance sheet filed, and the income statement information generally is presented for each period for which an audited income statement is required to be filed. Supplementary insurance information table includes segment name; deferred policy acquisition costs; future policy benefits, losses, claims and loss expenses; unearned premiums; other policy claims and benefits payable; premium revenue; net investment income; benefits, claims, losses and settlement expenses; amortization of deferred policy acquisition costs; other operating expenses; and premiums written. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.7-05.(c) Schedule III) -URI http://asc.fasb.org/extlink&oid=6879921&loc=d3e569147-122900 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 16 -Article 12 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 7 -Section 05 -Paragraph c Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 235 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-16) -URI http://asc.fasb.org/extlink&oid=6588446&loc=d3e574960-122915 + Details
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