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Derivative Instruments (Schedule Of Collateral Amounts With Rights To Reclaim Or Obligation To Return Cash) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Collateral Posted by Counter-Party (Held by LNC) $ 1,534lnc_CollateralPostedByCounterpartyHeldByEntity $ 939lnc_CollateralPostedByCounterpartyHeldByEntity
Collateral Posted by LNC (Held by Counter-Party) 85lnc_CollateralPostedByEntityHeldByCounterParty 316lnc_CollateralPostedByEntityHeldByCounterParty
AA- [Member]    
Collateral Posted by Counter-Party (Held by LNC) 64lnc_CollateralPostedByCounterpartyHeldByEntity
/ us-gaap_CreditRatingStandardPoorsAxis
= us-gaap_StandardPoorsAAMinusRatingMember		 34lnc_CollateralPostedByCounterpartyHeldByEntity
/ us-gaap_CreditRatingStandardPoorsAxis
= us-gaap_StandardPoorsAAMinusRatingMember
Collateral Posted by LNC (Held by Counter-Party)    10lnc_CollateralPostedByEntityHeldByCounterParty
/ us-gaap_CreditRatingStandardPoorsAxis
= us-gaap_StandardPoorsAAMinusRatingMember
A plus [Member]    
Collateral Posted by Counter-Party (Held by LNC) 47lnc_CollateralPostedByCounterpartyHeldByEntity
/ us-gaap_CreditRatingStandardPoorsAxis
= us-gaap_StandardPoorsAPlusRatingMember		 19lnc_CollateralPostedByCounterpartyHeldByEntity
/ us-gaap_CreditRatingStandardPoorsAxis
= us-gaap_StandardPoorsAPlusRatingMember
Collateral Posted by LNC (Held by Counter-Party)      
A [Member]    
Collateral Posted by Counter-Party (Held by LNC) 1,163lnc_CollateralPostedByCounterpartyHeldByEntity
/ us-gaap_CreditRatingStandardPoorsAxis
= us-gaap_StandardPoorsARatingMember		 339lnc_CollateralPostedByCounterpartyHeldByEntity
/ us-gaap_CreditRatingStandardPoorsAxis
= us-gaap_StandardPoorsARatingMember
Collateral Posted by LNC (Held by Counter-Party) 85lnc_CollateralPostedByEntityHeldByCounterParty
/ us-gaap_CreditRatingStandardPoorsAxis
= us-gaap_StandardPoorsARatingMember		 183lnc_CollateralPostedByEntityHeldByCounterParty
/ us-gaap_CreditRatingStandardPoorsAxis
= us-gaap_StandardPoorsARatingMember
A- [Member]    
Collateral Posted by Counter-Party (Held by LNC) 233lnc_CollateralPostedByCounterpartyHeldByEntity
/ us-gaap_CreditRatingStandardPoorsAxis
= us-gaap_StandardPoorsAMinusRatingMember		 468lnc_CollateralPostedByCounterpartyHeldByEntity
/ us-gaap_CreditRatingStandardPoorsAxis
= us-gaap_StandardPoorsAMinusRatingMember
Collateral Posted by LNC (Held by Counter-Party)    123lnc_CollateralPostedByEntityHeldByCounterParty
/ us-gaap_CreditRatingStandardPoorsAxis
= us-gaap_StandardPoorsAMinusRatingMember
BBB+ [Member]    
Collateral Posted by Counter-Party (Held by LNC) 27lnc_CollateralPostedByCounterpartyHeldByEntity
/ us-gaap_CreditRatingStandardPoorsAxis
= us-gaap_StandardPoorsBBBPlusRatingMember		 79lnc_CollateralPostedByCounterpartyHeldByEntity
/ us-gaap_CreditRatingStandardPoorsAxis
= us-gaap_StandardPoorsBBBPlusRatingMember
Collateral Posted by LNC (Held by Counter-Party)