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v2.4.1.9

Reconciliation of Policy and Contract Benefits and Reserves for Future Policy and Contract Benefits (Detail) (USD $) In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
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Insurance [Abstract] |  |  |  |
Policy and Contract Benefits | $ 1,529.3 us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseDisabilityAccidentAndHealth | $ 1,511.0 us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseDisabilityAccidentAndHealth | $ 1,484.6 us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseDisabilityAccidentAndHealth |
Reserves for Future Policy and Contract Benefits | 45,929.4 us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense | 43,099.1 us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense | 44,694.4 us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense |
Total Policy and Contract Benefits and Reserves for Future Policy and Contract Benefits | 47,458.7 us-gaap_LiabilityForFuturePolicyBenefits | 44,610.1 us-gaap_LiabilityForFuturePolicyBenefits | 46,179.0 us-gaap_LiabilityForFuturePolicyBenefits |
Life Reserves for Future Policy and Contract Benefits | 7,850.9 unm_LifeReservesForFuturePolicyAndContractBenefits | 7,740.5 unm_LifeReservesForFuturePolicyAndContractBenefits | 7,571.1 unm_LifeReservesForFuturePolicyAndContractBenefits |
Accident and Health Active Life Reserves | 9,263.5 unm_AccidentAndHealthActiveLifeReserves | 8,225.5 unm_AccidentAndHealthActiveLifeReserves | 7,763.3 unm_AccidentAndHealthActiveLifeReserves |
Unrealized Adjustment to Reserves for Future Policy and Contract Benefits | 6,150.3 unm_UnrealizedAdjustmentToReservesForFuturePolicyAndContractBenefits | 4,108.5 unm_UnrealizedAdjustmentToReservesForFuturePolicyAndContractBenefits | 6,277.5 unm_UnrealizedAdjustmentToReservesForFuturePolicyAndContractBenefits |
Liability for Claims and Claims Adjustment Expense | $ 24,194.0 us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense | $ 24,535.6 us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense | $ 24,567.1 us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense | $ 24,586.5 us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense

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- Definition Accident and Health Active Life Reserves + References No definition available. + Details
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- Definition Life Reserves for Future Policy and Contract Benefits + References No definition available. + Details
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- Definition Unrealized Adjustment to Reserves for Future Policy and Contract Benefits + References No definition available. + Details
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- Details
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- Definition The amount needed to reflect the estimated ultimate cost of settling claims relating to insured events that have occurred on or before the balance sheet date, whether or not reported to the insurer at that date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a),(b),(c) -URI http://asc.fasb.org/extlink&oid=6482485&loc=d3e14764-158437 + Details
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- Definition The amount needed to reflect the estimated ultimate cost of settling claims relating to disability, accident and health insurance insured events that have occurred on or before a particular date (ordinarily, the balance sheet date) and the amount needed to provide for the estimated ultimate cost required to investigate and settle claims relating to insured events that have occurred on or before a particular date (ordinarily, the balance sheet date), whether or not reported to the insurer at that date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 235 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=34713774&loc=d3e574960-122915 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 FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a),(b),(c) -URI http://asc.fasb.org/extlink&oid=6482485&loc=d3e14764-158437 + Details
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- Definition Amount of accrued obligation to policyholders that relates to insured events for long-duration contracts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 25 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=28366191&loc=d3e13145-158430 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 13 -Subparagraph a -Article 7 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.13(a)(1)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition The aggregate amount of policy reserves (provided for future obligations including unpaid claims and claims adjustment expenses) and policy benefits (liability for future policy benefits) as of the balance sheet date; grouped amount of all the liabilities associated with the company's insurance policies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 235 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=34713774&loc=d3e574960-122915 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 FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a),(b),(c) -URI http://asc.fasb.org/extlink&oid=6482485&loc=d3e14764-158437 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 13 -Subparagraph a -Article 7 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.13(a)(1)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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