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v2.4.1.9

Debt Schedule (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013
Debt Instrument |  |
Non-current Portion of Long-term Debt | $ 2,628.7 us-gaap_LongTermDebtNoncurrent | $ 2,612.0 us-gaap_LongTermDebtNoncurrent
Long-term Debt, Current Maturities | 151.9 us-gaap_LongTermDebtCurrent | 0 us-gaap_LongTermDebtCurrent
Long-term Debt | 2,780.6 us-gaap_LongTermDebt | 2,612.0 us-gaap_LongTermDebt
Fair Value Hedge Adjustment, LT Debt |  |
Debt Instrument |  |
Non-current Portion of Long-term Debt | (0.2)us-gaap_LongTermDebtNoncurrent / us-gaap_LongtermDebtTypeAxis = unm_FairValueHedgeAdjustmentLtDebtMember | (5.7)us-gaap_LongTermDebtNoncurrent / us-gaap_LongtermDebtTypeAxis = unm_FairValueHedgeAdjustmentLtDebtMember
Secured Notes Issued in 2007 | Senior Notes |  |
Debt Instrument |  |
Non-current Portion of Long-term Debt | 398.4 us-gaap_LongTermDebtNoncurrent / us-gaap_DebtInstrumentAxis = unm_SecuredNotesIssuedin2007Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 440.0 us-gaap_LongTermDebtNoncurrent / us-gaap_DebtInstrumentAxis = unm_SecuredNotesIssuedin2007Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Year of Maturity | Dec. 31, 2037 |
Interest Rate Terms | Variable |
Notes Issued in 1998 with 2018 Maturity Date | Senior Notes |  |
Debt Instrument |  |
Non-current Portion of Long-term Debt | 200.0 us-gaap_LongTermDebtNoncurrent / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin1998with2018MaturityDateMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 200.0 us-gaap_LongTermDebtNoncurrent / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin1998with2018MaturityDateMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Year of Maturity | Dec. 31, 2018 |
Debt Instrument, Interest Rate, Stated Percentage | 7.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin1998with2018MaturityDateMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
Notes Issued in 1998 with 2028 Maturity Date | Senior Notes |  |
Debt Instrument |  |
Non-current Portion of Long-term Debt | 365.8 us-gaap_LongTermDebtNoncurrent / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin1998with2028MaturityDateMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 365.8 us-gaap_LongTermDebtNoncurrent / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin1998with2028MaturityDateMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Year of Maturity | Dec. 31, 2028 |
Notes Issued in 1998 with 2028 Maturity Date | Minimum | Senior Notes |  |
Debt Instrument |  |
Debt Instrument, Interest Rate, Stated Percentage | 6.75%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin1998with2028MaturityDateMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
Notes Issued in 1998 with 2028 Maturity Date | Maximum | Senior Notes |  |
Debt Instrument |  |
Debt Instrument, Interest Rate, Stated Percentage | 7.25%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin1998with2028MaturityDateMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
Notes Issued in 2002 | Senior Notes |  |
Debt Instrument |  |
Non-current Portion of Long-term Debt | 39.5 us-gaap_LongTermDebtNoncurrent / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin2002Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 39.5 us-gaap_LongTermDebtNoncurrent / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin2002Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Year of Maturity | Dec. 31, 2032 |
Debt Instrument, Interest Rate, Stated Percentage | 7.375%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin2002Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
Notes Issued in 2005 |  |
Debt Instrument |  |
Long-term Debt, Current Maturities | 151.9 us-gaap_LongTermDebtCurrent / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin2005Member | 0 us-gaap_LongTermDebtCurrent / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin2005Member
Year of Maturity | Dec. 31, 2015 |
Debt Instrument, Interest Rate, Stated Percentage | 6.85%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin2005Member |
Notes Issued in 2005 | Senior Notes |  |
Debt Instrument |  |
Non-current Portion of Long-term Debt | 0 us-gaap_LongTermDebtNoncurrent / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin2005Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 296.8 us-gaap_LongTermDebtNoncurrent / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin2005Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Year of Maturity | Dec. 31, 2015 |
Debt Instrument, Interest Rate, Stated Percentage | 6.85%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin2005Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
Notes Issued in 2009 | Senior Notes |  |
Debt Instrument |  |
Non-current Portion of Long-term Debt | 350.0 us-gaap_LongTermDebtNoncurrent / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin2009Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 350.0 us-gaap_LongTermDebtNoncurrent / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin2009Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Year of Maturity | Dec. 31, 2016 |
Debt Instrument, Interest Rate, Stated Percentage | 7.125%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin2009Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
Notes Issued in 2010 | Senior Notes |  |
Debt Instrument |  |
Non-current Portion of Long-term Debt | 399.7 us-gaap_LongTermDebtNoncurrent / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin2010Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 399.7 us-gaap_LongTermDebtNoncurrent / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin2010Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Year of Maturity | Dec. 31, 2020 |
Debt Instrument, Interest Rate, Stated Percentage | 5.625%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin2010Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
Notes Issued in 2012 | Senior Notes |  |
Debt Instrument |  |
Non-current Portion of Long-term Debt | 248.7 us-gaap_LongTermDebtNoncurrent / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin2012Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 248.6 us-gaap_LongTermDebtNoncurrent / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin2012Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Year of Maturity | Dec. 31, 2042 |
Debt Instrument, Interest Rate, Stated Percentage | 5.75%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin2012Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
Notes Issued in 2014 | Senior Notes |  |
Debt Instrument |  |
Non-current Portion of Long-term Debt | 349.5 us-gaap_LongTermDebtNoncurrent / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin2014Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 0 us-gaap_LongTermDebtNoncurrent / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin2014Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember
Year of Maturity | Dec. 31, 2024 |
Debt Instrument, Interest Rate, Stated Percentage | 4.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin2014Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
Notes Issued 1990 to 1996 | Medium-term Notes |  |
Debt Instrument |  |
Non-current Portion of Long-term Debt | 50.8 us-gaap_LongTermDebtNoncurrent / us-gaap_DebtInstrumentAxis = unm_NotesIssued1990to1996Member / us-gaap_LongtermDebtTypeAxis = us-gaap_MediumTermNotesMember | 50.8 us-gaap_LongTermDebtNoncurrent / us-gaap_DebtInstrumentAxis = unm_NotesIssued1990to1996Member / us-gaap_LongtermDebtTypeAxis = us-gaap_MediumTermNotesMember
Debt Instrument, Maturity Date Range, Start | Dec. 31, 2023 |
Debt Instrument, Maturity Date Range, End | Dec. 31, 2028 |
Notes Issued 1990 to 1996 | Minimum | Medium-term Notes |  |
Debt Instrument |  |
Debt Instrument, Interest Rate, Stated Percentage | 7.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = unm_NotesIssued1990to1996Member / us-gaap_LongtermDebtTypeAxis = us-gaap_MediumTermNotesMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
Notes Issued 1990 to 1996 | Maximum | Medium-term Notes |  |
Debt Instrument |  |
Debt Instrument, Interest Rate, Stated Percentage | 7.19%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = unm_NotesIssued1990to1996Member / us-gaap_LongtermDebtTypeAxis = us-gaap_MediumTermNotesMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
Notes Issued in 1998 with 2038 Maturity Date | Junior Subordinated Debt |  |
Debt Instrument |  |
Non-current Portion of Long-term Debt | $ 226.5 us-gaap_LongTermDebtNoncurrent / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin1998with2038MaturityDateMember / us-gaap_LongtermDebtTypeAxis = us-gaap_JuniorSubordinatedDebtMember | $ 226.5 us-gaap_LongTermDebtNoncurrent / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin1998with2038MaturityDateMember / us-gaap_LongtermDebtTypeAxis = us-gaap_JuniorSubordinatedDebtMember
Year of Maturity | Dec. 31, 2038 |
Debt Instrument, Interest Rate, Stated Percentage | 7.405%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = unm_NotesIssuedin1998with2038MaturityDateMember / us-gaap_LongtermDebtTypeAxis = us-gaap_JuniorSubordinatedDebtMember |

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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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