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v2.4.1.9

Premium Income by Major Line of Business within Each Segment (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Premium Income | $ 1,967.9 us-gaap_PremiumsEarnedNet | $ 1,947.2 us-gaap_PremiumsEarnedNet | $ 1,943.6 us-gaap_PremiumsEarnedNet | $ 1,938.5 us-gaap_PremiumsEarnedNet | $ 1,890.7 us-gaap_PremiumsEarnedNet | $ 1,897.3 us-gaap_PremiumsEarnedNet | $ 1,905.8 us-gaap_PremiumsEarnedNet | $ 1,930.9 us-gaap_PremiumsEarnedNet | $ 7,797.2 us-gaap_PremiumsEarnedNet | $ 7,624.7 us-gaap_PremiumsEarnedNet | $ 7,716.1 us-gaap_PremiumsEarnedNet
Accident, Sickness, and Disability Insurance |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Premium Income |  |  |  |  |  |  |  |  | 5,926.0 us-gaap_PremiumsEarnedNet / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = us-gaap_AccidentAndHealthInsuranceSegmentMember | 5,849.6 us-gaap_PremiumsEarnedNet / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = us-gaap_AccidentAndHealthInsuranceSegmentMember | 5,868.1 us-gaap_PremiumsEarnedNet / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = us-gaap_AccidentAndHealthInsuranceSegmentMember
Life Insurance Product Line |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Premium Income |  |  |  |  |  |  |  |  | 1,871.2 us-gaap_PremiumsEarnedNet / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = us-gaap_LifeInsuranceSegmentMember | 1,775.1 us-gaap_PremiumsEarnedNet / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = us-gaap_LifeInsuranceSegmentMember | 1,848.0 us-gaap_PremiumsEarnedNet / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = us-gaap_LifeInsuranceSegmentMember
Operating Segments |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Premium Income |  |  |  |  |  |  |  |  | 7,797.2 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember | 7,624.7 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember | 7,716.1 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember
Operating Segments | Unum U.S. |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Premium Income |  |  |  |  |  |  |  |  | 4,659.7 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUsMember | 4,517.1 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUsMember | 4,456.5 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUsMember
Operating Segments | Unum U.S. | Group Long term Disability |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Premium Income |  |  |  |  |  |  |  |  | 1,553.5 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_GroupLongTermDisabilityMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUsMember | 1,553.9 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_GroupLongTermDisabilityMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUsMember | 1,578.8 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_GroupLongTermDisabilityMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUsMember
Operating Segments | Unum U.S. | Group Short term Disability |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Premium Income |  |  |  |  |  |  |  |  | 558.1 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_GroupShortTermDisabilityMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUsMember | 519.6 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_GroupShortTermDisabilityMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUsMember | 476.7 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_GroupShortTermDisabilityMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUsMember
Operating Segments | Unum U.S. | Group Life |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Premium Income |  |  |  |  |  |  |  |  | 1,262.3 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_GroupLifeMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUsMember | 1,213.9 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_GroupLifeMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUsMember | 1,182.1 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_GroupLifeMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUsMember
Operating Segments | Unum U.S. | Accidental Death Dismemberment |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Premium Income |  |  |  |  |  |  |  |  | 125.9 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_AccidentalDeathDismembermentMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUsMember | 121.6 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_AccidentalDeathDismembermentMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUsMember | 115.3 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_AccidentalDeathDismembermentMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUsMember
Operating Segments | Unum U.S. | Individual Disability Insurance |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Premium Income |  |  |  |  |  |  |  |  | 466.1 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_IndividualDisabilityInsuranceMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUsMember | 465.3 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_IndividualDisabilityInsuranceMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUsMember | 477.6 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_IndividualDisabilityInsuranceMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUsMember
Operating Segments | Unum U.S. | Voluntary Benefits |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Premium Income |  |  |  |  |  |  |  |  | 693.8 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_VoluntaryBenefitsMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUsMember | 642.8 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_VoluntaryBenefitsMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUsMember | 626.0 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_VoluntaryBenefitsMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUsMember
Operating Segments | Unum U.K. |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Premium Income |  |  |  |  |  |  |  |  | 607.2 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUkMember | 556.6 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUkMember | 694.6 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUkMember
Operating Segments | Unum U.K. | Group Long term Disability |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Premium Income |  |  |  |  |  |  |  |  | 418.9 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_GroupLongTermDisabilityMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUkMember | 389.9 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_GroupLongTermDisabilityMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUkMember | 409.7 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_GroupLongTermDisabilityMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUkMember
Operating Segments | Unum U.K. | Group Life |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Premium Income |  |  |  |  |  |  |  |  | 133.2 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_GroupLifeMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUkMember | 106.4 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_GroupLifeMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUkMember | 221.3 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_GroupLifeMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUkMember
Operating Segments | Unum U.K. | Supplemental Insurance |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Premium Income |  |  |  |  |  |  |  |  | 55.1 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_SupplementalandVoluntaryInsuranceMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUkMember | 60.3 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_SupplementalandVoluntaryInsuranceMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUkMember | 63.6 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_SupplementalandVoluntaryInsuranceMember / us-gaap_StatementBusinessSegmentsAxis = unm_UnumUkMember
Operating Segments | Colonial Life |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Premium Income |  |  |  |  |  |  |  |  | 1,273.7 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = unm_ColonialLifeMember | 1,232.2 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = unm_ColonialLifeMember | 1,194.5 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = unm_ColonialLifeMember
Operating Segments | Colonial Life | Accident, Sickness, and Disability Insurance |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Premium Income |  |  |  |  |  |  |  |  | 759.8 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = us-gaap_AccidentAndHealthInsuranceSegmentMember / us-gaap_StatementBusinessSegmentsAxis = unm_ColonialLifeMember | 738.7 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = us-gaap_AccidentAndHealthInsuranceSegmentMember / us-gaap_StatementBusinessSegmentsAxis = unm_ColonialLifeMember | 724.5 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = us-gaap_AccidentAndHealthInsuranceSegmentMember / us-gaap_StatementBusinessSegmentsAxis = unm_ColonialLifeMember
Operating Segments | Colonial Life | Life Insurance Product Line |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Premium Income |  |  |  |  |  |  |  |  | 231.8 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = us-gaap_LifeInsuranceSegmentMember / us-gaap_StatementBusinessSegmentsAxis = unm_ColonialLifeMember | 221.1 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = us-gaap_LifeInsuranceSegmentMember / us-gaap_StatementBusinessSegmentsAxis = unm_ColonialLifeMember | 209.7 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = us-gaap_LifeInsuranceSegmentMember / us-gaap_StatementBusinessSegmentsAxis = unm_ColonialLifeMember
Operating Segments | Colonial Life | Cancer and Critical Illness Colonial |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Premium Income |  |  |  |  |  |  |  |  | 282.1 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_CancerAndCriticalIllnessColonialMember / us-gaap_StatementBusinessSegmentsAxis = unm_ColonialLifeMember | 272.4 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_CancerAndCriticalIllnessColonialMember / us-gaap_StatementBusinessSegmentsAxis = unm_ColonialLifeMember | 260.3 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_CancerAndCriticalIllnessColonialMember / us-gaap_StatementBusinessSegmentsAxis = unm_ColonialLifeMember
Operating Segments | Closed Block |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Premium Income |  |  |  |  |  |  |  |  | 1,256.6 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = unm_ClosedBlockMember | 1,318.8 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = unm_ClosedBlockMember | 1,370.5 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = unm_ClosedBlockMember
Operating Segments | Closed Block | Individual Disability Insurance |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Premium Income |  |  |  |  |  |  |  |  | 624.8 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_IndividualDisabilityInsuranceMember / us-gaap_StatementBusinessSegmentsAxis = unm_ClosedBlockMember | 687.5 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_IndividualDisabilityInsuranceMember / us-gaap_StatementBusinessSegmentsAxis = unm_ClosedBlockMember | 736.4 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_IndividualDisabilityInsuranceMember / us-gaap_StatementBusinessSegmentsAxis = unm_ClosedBlockMember
Operating Segments | Closed Block | Long-term Care |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Premium Income |  |  |  |  |  |  |  |  | 630.9 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_LongTermCareMember / us-gaap_StatementBusinessSegmentsAxis = unm_ClosedBlockMember | 630.6 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_LongTermCareMember / us-gaap_StatementBusinessSegmentsAxis = unm_ClosedBlockMember | 631.9 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = unm_LongTermCareMember / us-gaap_StatementBusinessSegmentsAxis = unm_ClosedBlockMember
Operating Segments | Closed Block | Other Insurance Product Line |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Premium Income |  |  |  |  |  |  |  |  | $ 0.9 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = us-gaap_OtherInsuranceProductLineMember / us-gaap_StatementBusinessSegmentsAxis = unm_ClosedBlockMember | $ 0.7 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = us-gaap_OtherInsuranceProductLineMember / us-gaap_StatementBusinessSegmentsAxis = unm_ClosedBlockMember | $ 2.2 us-gaap_PremiumsEarnedNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis = us-gaap_OtherInsuranceProductLineMember / us-gaap_StatementBusinessSegmentsAxis = unm_ClosedBlockMember

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- Definition Amount, after premiums ceded to other entities and premiums assumed by the entity, of premiums earned. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 17 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 235 -Section S99 -Paragraph 2 -Subparagraph (SX 210.12-17) -URI http://asc.fasb.org/extlink&oid=34713774&loc=d3e574992-122915 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.1) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 1 -Article 7 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(c)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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