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Schedule I Summary of Investments | 12 Months Ended
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Dec. 31, 2014
Summary of Investments, Other than Investments in Related Parties [Abstract] |
Summary of Investments, Other than Investments in Related Parties | SCHEDULE I--SUMMARY OF INVESTMENTS - OTHER THAN INVESTMENTS IN RELATED PARTIES Unum Group and Subsidiaries
Type of Investment |  | Cost or Amortized Cost (1) |  | Fair Value |  | Amount shown on the balance sheet |
|  | (in millions of dollars) |
Fixed Maturity Securities: |  |  |  |  |  |  |
Bonds |  |  |  |  |  |  |
United States Government and Government Agencies and Authorities |  | $ | 983.5 |  |  | $ | 1,238.5 |  |  | $ | 1,238.5 |  |
States, Municipalities, and Political Subdivisions |  | 1,745.0 |  |  | 2,121.5 |  |  | 2,121.5 |  |
Foreign Governments |  | 1,101.1 |  |  | 1,307.4 |  |  | 1,307.4 |  |
Public Utilities |  | 7,046.1 |  |  | 8,550.6 |  |  | 8,550.6 |  |
Mortgage/Asset-Backed Securities |  | 2,224.9 |  |  | 2,431.8 |  |  | 2,431.8 |  |
All Other Corporate Bonds |  | 25,658.8 |  |  | 29,365.2 |  |  | 29,365.2 |  |
Redeemable Preferred Stocks |  | 44.0 |  |  | 49.9 |  |  | 49.9 |  |
Total Fixed Maturity Securities |  | 38,803.4 |  |  | $ | 45,064.9 |  |  | 45,064.9 |  |
Mortgage Loans |  | 1,856.6 |  |  |  |  | 1,856.6 |  |
Policy Loans |  | 3,306.6 |  |  |  |  | 3,306.6 |  |
Other Long-term Investments |  |  |  |  |  |  |
Derivatives |  | — |  |  |  |  | 28.0 |  | (2)
Equity Securities |  | 7.9 |  |  |  |  | 12.5 |  |
Miscellaneous Long-term Investments |  | 542.6 |  |  |  |  | 551.4 |  | (3)
Short-term Investments |  | 974.3 |  |  |  |  | 974.3 |  |
Total Investments |  | $ | 45,491.4 |  |  |  |  | $ | 51,794.3 |  |
(1) | The amortized cost for fixed maturity securities and mortgage loans represents original cost reduced by repayments, write-downs from other-than-temporary declines in fair value, amortization of premiums, and/or accretion of discounts.
(2) | Derivatives are carried at fair value.
(3) | The difference between amortized cost and carrying value primarily results from changes in the partnership owner's equity since acquisition.

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- Definition The entire disclosure for the schedule applicable to insurance companies summarizing investments held as of the most recent audited balance sheet. At a minimum, such summary is by three major categories of investments including: (1) fixed maturities primarily consisting of bonds, including convertibles and bonds with warrants, and redeemable preferred stocks, (2) equity securities primarily consisting of common stocks and nonredeemable preferred stocks, and (3) other investments including mortgage loans on real estate, real estate held for investment, real estate acquired in satisfaction of debt, policy loans, other long-term investments, and short-term investments not otherwise categorized. The information provided with respect to each item within each category includes: (A) the original cost of equity securities and, as to fixed maturity securities, original cost reduced by repayments and adjusted for amortization of premiums or accrual of discounts, (B) fair value as of the reporting date, and (C) the amount at which the item within each category is shown in the statement of financial position; with respect to (C), if the amount at which shown in the statement of financial position is different from the items original [amortized] cost or fair value, an explanation of the difference may be included herein. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 15 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 7 -Subparagraph (SX 210.12-15) -URI http://asc.fasb.org/extlink&oid=34726532&loc=d3e611379-123010 + Details
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