XML 105 R89.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Derivative Instruments (Schedule Of Collateral Amounts With Rights To Reclaim Or Obligation To Return Cash) (Details) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Credit Derivatives [Line Items] |  |
Collateral Posted by Counter-Party (Held by LNC) | $ 765 | $ 894
Collateral Posted by LNC (Held by Counter-Party) | (581) | (630)
AA- [Member] |  |
Credit Derivatives [Line Items] |  |
Collateral Posted by Counter-Party (Held by LNC) | 116 | 53
Collateral Posted by LNC (Held by Counter-Party) | (1) | (32)
A+ [Member] |  |
Credit Derivatives [Line Items] |  |
Collateral Posted by Counter-Party (Held by LNC) | 242 | 10
Collateral Posted by LNC (Held by Counter-Party) | (453) | (217)
A [Member] |  |
Credit Derivatives [Line Items] |  |
Collateral Posted by Counter-Party (Held by LNC) | 170 | 466
Collateral Posted by LNC (Held by Counter-Party) | (120) | (381)
A- [Member] |  |
Credit Derivatives [Line Items] |  |
Collateral Posted by Counter-Party (Held by LNC) | 237 | 67
Collateral Posted by LNC (Held by Counter-Party) | (3) |
BBB+ [Member] |  |
Credit Derivatives [Line Items] |  |
Collateral Posted by Counter-Party (Held by LNC) |  | 298
Collateral Posted by LNC (Held by Counter-Party) | $ (4) |

X
- Definition Cash collateral held by the entity that was obligated to be returned to the counterparty. + References No definition available. + Details
Name: | lnc_CollateralPostedByCounterpartyHeldByEntity
Namespace Prefix: | lnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Cash collateral held by the counterparty in which the entity had the right to reclaim. + References No definition available. + Details
Name: | lnc_CollateralPostedByEntityHeldByCounterParty
Namespace Prefix: | lnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_CreditDerivativesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_CreditRatingStandardPoorsAxis=us-gaap_StandardPoorsAAMinusRatingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditRatingStandardPoorsAxis=us-gaap_StandardPoorsAPlusRatingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditRatingStandardPoorsAxis=us-gaap_StandardPoorsARatingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditRatingStandardPoorsAxis=us-gaap_StandardPoorsAMinusRatingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditRatingStandardPoorsAxis=us-gaap_StandardPoorsBBBPlusRatingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |