XML 1096 R159.htm IDEA: XBRL DOCUMENT v2.4.1.9
Fair Value of Financial Instruments (Schedule Of Investment Holdings Movements) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]      
Issuances $ 892us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues $ 849us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues $ 849us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues
Sales (172)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales (117)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales (58)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales
Maturities (467)lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetMaturities (369)lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetMaturities (256)lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetMaturities
Settlements 43us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements 25us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements (179)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements
Calls (167)lnc_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnobservableInputInvestmentHoldingsMovementsCalls (72)lnc_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnobservableInputInvestmentHoldingsMovementsCalls (7)lnc_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnobservableInputInvestmentHoldingsMovementsCalls
Total 129lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls 316lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls 349lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
Corporate bonds [Member] | Fixed maturity securities [Member]      
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]      
Issuances 600us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CorporateBondSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
533us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CorporateBondSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
364us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CorporateBondSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
Sales (75)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CorporateBondSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
(51)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CorporateBondSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
(30)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CorporateBondSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
Maturities (115)lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetMaturities
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CorporateBondSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
(47)lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetMaturities
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CorporateBondSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
(6)lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetMaturities
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CorporateBondSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
Settlements (51)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CorporateBondSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
(49)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CorporateBondSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
(52)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CorporateBondSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
Calls (162)lnc_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnobservableInputInvestmentHoldingsMovementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CorporateBondSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
(70)lnc_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnobservableInputInvestmentHoldingsMovementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CorporateBondSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
(7)lnc_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnobservableInputInvestmentHoldingsMovementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CorporateBondSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
Total 197lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CorporateBondSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
316lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CorporateBondSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
269lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CorporateBondSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
Asset-backed Securities [Member] | Fixed maturity securities [Member]      
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]      
Issuances   30us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues
/ us-gaap_FinancialInstrumentAxis
= us-gaap_AssetBackedSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
 
Settlements   (1)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements
/ us-gaap_FinancialInstrumentAxis
= us-gaap_AssetBackedSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
(3)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements
/ us-gaap_FinancialInstrumentAxis
= us-gaap_AssetBackedSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
Total   29lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_AssetBackedSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
(3)lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_AssetBackedSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
U.S. government bonds [Member] | Fixed maturity securities [Member]      
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]      
Settlements   (1)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements
/ us-gaap_FinancialInstrumentAxis
= us-gaap_USGovernmentDebtSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
 
Total   (1)lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_USGovernmentDebtSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
 
Foreign government bonds [Member] | Fixed maturity securities [Member]      
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]      
Issuances   50us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
 
Maturities   (17)lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetMaturities
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
(5)lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetMaturities
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
Total   33lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
(5)lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
RMBS [Member] | Fixed maturity securities [Member]      
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]      
Maturities     (7)lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetMaturities
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ResidentialMortgageBackedSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
Settlements   (2)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ResidentialMortgageBackedSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
(1)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ResidentialMortgageBackedSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
Total   (2)lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ResidentialMortgageBackedSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
(8)lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ResidentialMortgageBackedSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
CMBS [Member] | Fixed maturity securities [Member]      
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]      
Settlements (13)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialMortgageBackedSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
(4)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialMortgageBackedSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
(12)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialMortgageBackedSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
Calls   (2)lnc_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnobservableInputInvestmentHoldingsMovementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialMortgageBackedSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
 
Total (13)lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialMortgageBackedSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
(6)lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialMortgageBackedSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
(12)lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialMortgageBackedSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
CLOs [Member] | Fixed maturity securities [Member]      
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]      
Issuances 187us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CollateralizedLoanObligationsMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
74us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CollateralizedLoanObligationsMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
72us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CollateralizedLoanObligationsMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
Settlements (46)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CollateralizedLoanObligationsMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
(24)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CollateralizedLoanObligationsMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
(11)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CollateralizedLoanObligationsMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
Calls (5)lnc_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnobservableInputInvestmentHoldingsMovementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CollateralizedLoanObligationsMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
   
Total 136lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CollateralizedLoanObligationsMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
50lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CollateralizedLoanObligationsMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
61lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CollateralizedLoanObligationsMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
State and municipal bonds [Member] | Fixed maturity securities [Member]      
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]      
Issuances     32us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues
/ us-gaap_FinancialInstrumentAxis
= us-gaap_USStatesAndPoliticalSubdivisionsMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
Total     32lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_USStatesAndPoliticalSubdivisionsMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
Hybrid and redeemable preferred securities [Member] | Fixed maturity securities [Member]      
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]      
Sales (5)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales
/ us-gaap_FinancialInstrumentAxis
= us-gaap_OtherDebtSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
(35)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales
/ us-gaap_FinancialInstrumentAxis
= us-gaap_OtherDebtSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
 
Total (5)lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_OtherDebtSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
(35)lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_OtherDebtSecuritiesMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= us-gaap_FixedMaturitiesMember
 
Equity securities [Member]      
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]      
Issuances   78us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues
/ us-gaap_FinancialInstrumentAxis
= us-gaap_EquitySecuritiesMember
26us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues
/ us-gaap_FinancialInstrumentAxis
= us-gaap_EquitySecuritiesMember
Sales (5)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales
/ us-gaap_FinancialInstrumentAxis
= us-gaap_EquitySecuritiesMember
(5)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales
/ us-gaap_FinancialInstrumentAxis
= us-gaap_EquitySecuritiesMember
 
Total (5)lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_EquitySecuritiesMember
73lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_EquitySecuritiesMember
26lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_EquitySecuritiesMember
Trading securities [Member]      
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]      
Issuances 14us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues
/ us-gaap_FinancialInstrumentAxis
= us-gaap_TradingAccountAssetsMember
   
Sales   (3)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales
/ us-gaap_FinancialInstrumentAxis
= us-gaap_TradingAccountAssetsMember
 
Maturities   (1)lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetMaturities
/ us-gaap_FinancialInstrumentAxis
= us-gaap_TradingAccountAssetsMember
 
Settlements (4)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements
/ us-gaap_FinancialInstrumentAxis
= us-gaap_TradingAccountAssetsMember
(2)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements
/ us-gaap_FinancialInstrumentAxis
= us-gaap_TradingAccountAssetsMember
(2)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements
/ us-gaap_FinancialInstrumentAxis
= us-gaap_TradingAccountAssetsMember
Total 10lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_TradingAccountAssetsMember
(6)lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_TradingAccountAssetsMember
(2)lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_TradingAccountAssetsMember
Derivative investments [Member]      
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]      
Issuances 160us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues
/ us-gaap_FinancialInstrumentAxis
= us-gaap_DerivativeFinancialInstrumentsAssetsMember
152us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues
/ us-gaap_FinancialInstrumentAxis
= us-gaap_DerivativeFinancialInstrumentsAssetsMember
454us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues
/ us-gaap_FinancialInstrumentAxis
= us-gaap_DerivativeFinancialInstrumentsAssetsMember
Sales (87)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales
/ us-gaap_FinancialInstrumentAxis
= us-gaap_DerivativeFinancialInstrumentsAssetsMember
(23)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales
/ us-gaap_FinancialInstrumentAxis
= us-gaap_DerivativeFinancialInstrumentsAssetsMember
(28)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales
/ us-gaap_FinancialInstrumentAxis
= us-gaap_DerivativeFinancialInstrumentsAssetsMember
Maturities (352)lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetMaturities
/ us-gaap_FinancialInstrumentAxis
= us-gaap_DerivativeFinancialInstrumentsAssetsMember
(304)lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetMaturities
/ us-gaap_FinancialInstrumentAxis
= us-gaap_DerivativeFinancialInstrumentsAssetsMember
(238)lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetMaturities
/ us-gaap_FinancialInstrumentAxis
= us-gaap_DerivativeFinancialInstrumentsAssetsMember
Total (279)lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_DerivativeFinancialInstrumentsAssetsMember
(175)lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_DerivativeFinancialInstrumentsAssetsMember
188lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= us-gaap_DerivativeFinancialInstrumentsAssetsMember
Indexed annuity and IUL contracts embedded derivatives [Member] | Future contract benefits [Member]      
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]      
Issuances (69)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues
/ us-gaap_FinancialInstrumentAxis
= lnc_IndexedAnnuityContractsMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= lnc_FutureContractBenefitsMember
(68)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues
/ us-gaap_FinancialInstrumentAxis
= lnc_IndexedAnnuityContractsMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= lnc_FutureContractBenefitsMember
(99)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues
/ us-gaap_FinancialInstrumentAxis
= lnc_IndexedAnnuityContractsMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= lnc_FutureContractBenefitsMember
Settlements 157us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements
/ us-gaap_FinancialInstrumentAxis
= lnc_IndexedAnnuityContractsMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= lnc_FutureContractBenefitsMember
108us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements
/ us-gaap_FinancialInstrumentAxis
= lnc_IndexedAnnuityContractsMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= lnc_FutureContractBenefitsMember
(98)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements
/ us-gaap_FinancialInstrumentAxis
= lnc_IndexedAnnuityContractsMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= lnc_FutureContractBenefitsMember
Total $ 88lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= lnc_IndexedAnnuityContractsMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= lnc_FutureContractBenefitsMember
$ 40lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= lnc_IndexedAnnuityContractsMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= lnc_FutureContractBenefitsMember
$ (197)lnc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesMaturitiesSettlementsCalls
/ us-gaap_FinancialInstrumentAxis
= lnc_IndexedAnnuityContractsMember
/ us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentAxis
= lnc_FutureContractBenefitsMember