XML 58 R47.htm IDEA: XBRL DOCUMENT
v3.21.1

Investments (Credit Loss Expense Incurred) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items] |  |
Gross credit loss expense recognized in net income (loss) | $ (2) | $ (20)
Net credit loss expense recognized in net income (loss) | (2) | (20)
Corporate Bonds [Member] |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items] |  |
Gross credit loss expense recognized in net income (loss) | $ (2) | $ (20)

X
- Definition Debt Securities, Available-for-sale, Allowance for Credit Loss, Not Previously Recorded, Before associated amortization. + References No definition available. + Details
Name: | lnc_DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotPreviouslyRecordedGross
Namespace Prefix: | lnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Debt Securities, Available-for-sale, Allowance for Credit Loss, Not Previously Recorded, Net of associated amortization + References No definition available. + Details
Name: | lnc_DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotPreviouslyRecordedNet
Namespace Prefix: | lnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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_DebtSecuritiesAvailableforsaleAllowanceForCreditLossLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CorporateBondSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |