XML 145 R129.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Retirement and Deferred Compensation Plans (Fair Value of Benefit Plan Assets) (Details) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Fair Value of Benefit Plans' Assets [Abstract] |  |
Common and preferred stock | $ 615 | $ 556
Cash and invested cash | 103 | 120
Other investments | 62 | 58
Total | 1,626 | 1,489
Fixed maturity AFS securities [Member] |  |
Fair Value of Benefit Plans' Assets [Abstract] |  |
Corporate bonds | 292 | 322
U.S. government bonds | 291 | 235
Foreign government bonds | 231 | 167
State and municipal bonds | $ 32 | $ 31

X
- Definition The fair value of cash and invested cash held by LNC benefit plans + References No definition available. + Details
Name: | lnc_FairValueBenefitPlanAssetsCashAndInvestedCash
Namespace Prefix: | lnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The fair value of common stock held by LNC benefit plans + References No definition available. + Details
Name: | lnc_FairValueBenefitPlanAssetsCommonStock
Namespace Prefix: | lnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The fair value of corporate bonds held by LNC benefit plans + References No definition available. + Details
Name: | lnc_FairValueBenefitPlanAssetsCorporateBonds
Namespace Prefix: | lnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The fair value of foreign government bonds held by LNC benefit plans + References No definition available. + Details
Name: | lnc_FairValueBenefitPlanAssetsForeignGovernmentBonds
Namespace Prefix: | lnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The fair value of other investments held by LNC benefit plans + References No definition available. + Details
Name: | lnc_FairValueBenefitPlanAssetsOtherInvestments
Namespace Prefix: | lnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The total fair value of assets held by LNC benefit plans + References No definition available. + Details
Name: | lnc_FairValueBenefitPlanAssetsTotal
Namespace Prefix: | lnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The fair value of U.S. government bonds held by LNC benefit plans + References No definition available. + Details
Name: | lnc_FairValueBenefitPlanAssetsUsGovernmentBonds
Namespace Prefix: | lnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition n/a + References No definition available. + Details
Name: | lnc_FairValueOfBenefitPlansAssetsAbstract
Namespace Prefix: | lnc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The fair value of state and municipal bonds held by LNC benefit plans + References No definition available. + Details
Name: | lnc_StateAndMunicipalBonds
Namespace Prefix: | lnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_FixedMaturitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |