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Derivative Instruments - Narrative (Details) $ in Millions | 9 Months Ended
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Sep. 30, 2024 USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Cash flow hedge gain (loss) to be reclassified within 12 months | $ 77
CDs, counterparty collateral | $ 3

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- Definition Credit Derivative, Counterparty Collateral Without Netting Arrangements + References No definition available. + Details
Name: | lnc_CreditDerivativeCounterpartyCollateralWithoutNettingArrangements
Namespace Prefix: | lnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480870/815-30-50-1 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration