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Variable Interest Entities (Narrative) (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Variable Interest Entity [Line Items] |  |
Gains (losses) for consolidated variable interest entities | $ 0 | $ 0
Outstanding Principal Balance of Surplus Note Issued By LRCVV And Held By LFLLCI | 594,000,000 |
Long-Term Senior Note Issued In Exchange For Corporate Bond Afs Security | 275,000,000 |
Outstanding Principal Balance of Long-Term Senior Note Issued In Exchange For Corporate Bond AFS Security | 995,000,000 |
Maxiumum Principal Balance of Long Term Senior Note Issued In Exchange For Corporate Bond AFS Security | 1,100,000,000 |
Carrying amount of other investments | 4,292,000,000 | 3,984,000,000
Non Affiliated VIE One [Member] |  |
Variable Interest Entity [Line Items] |  |
Outstanding Principal Balance of Surplus Note Issued By LRCVV And Held By LFLLCI | 0 |
Surplus notes | 0 |
Non Affiliated VIE Two [Member] |  |
Variable Interest Entity [Line Items] |  |
Outstanding Principal Balance of Long-Term Senior Note Issued In Exchange For Corporate Bond AFS Security | 378,000,000 |
Maxiumum Principal Balance of Long Term Senior Note Issued In Exchange For Corporate Bond AFS Security | 500,000,000 |
Limited Partnerships and Limited Liability Companies [Member] |  |
Variable Interest Entity [Line Items] |  |
Carrying amount of other investments | 2,900,000,000 | $ 2,100,000,000
Senior notes [Member] |  |
Variable Interest Entity [Line Items] |  |
Outstanding Principal Balance of Long-Term Senior Note Issued In Exchange For Corporate Bond AFS Security | 386,000,000 |
Maxiumum Principal Balance of Long Term Senior Note Issued In Exchange For Corporate Bond AFS Security | $ 400,000,000 |

X
- Definition Amount of long-term senior note issued in exchange for a corporate bond AFS security from a non-affiliated VIE whose primary activities are to acquire, hold, and issue notes and loans, as well as pay and collect interest on the notes and loans. + References No definition available. + Details
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Namespace Prefix: | lnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The outstanding principal balance is variable in nature; moving concurrently with any variability in the face amount of the corporate bond AFS security up to this maximum amount. + References No definition available. + Details
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X
- Definition Amount of principal balance outstanding of long-term senior note issued in exchange for a corporate bond AFS security from a non-affiliated VIE whose primary activities are to acquire, hold, and issue notes and loans, as well as pay and collect interest on the notes and loans. + References No definition available. + Details
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Namespace Prefix: | lnc_
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X
- Definition Amount of principal balance outstanding of the suplus note held by LFLLCI and issued by LRCVV. + References No definition available. + Details
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X
- Definition The amount of net gains and losses recognized in income during the period on derivative instruments not designated and not qualifying as hedging instruments associated with consolidated variable interest entities. + References No definition available. + Details
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- Definition Amount of investments classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(f,g)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Financial instruments issued by insurance entities (surplus notes) that are includable in surplus for statutory accounting purposes as prescribed or permitted by state laws and regulations that are liabilities of the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6486086&loc=d3e24387-158525 + Details
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- 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
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- Details
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- Details
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