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Derivative Instruments (Narrative) (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Credit Derivatives [Line Items] |  |  |
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months | $ 99 |  |
Cash flow hedge, reclassified to earnings, net | 0 | $ 0 |
Collateral Requirement If Netting Agreements Not In Place | 1 |  |
Non-performance Risk Adjustment | 0 |  |
Exposure Associated With Collateralization Events | $ 0 |  | $ 0
Indexed Annuity [Member] |  |  |
Credit Derivatives [Line Items] |  |  |
Derivative term | 6 years |  |

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- Definition Cash flow hedge, reclassified to earnings, net + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Amount of collateral that would have been required to be posted as of the balance sheet date if contractual provisions that allow for netting of collateral with counterparties related to collateralized financing transactions were not in place. + References No definition available. + Details
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- Definition Amount of exposure associated with collateral support agreements in certain transactions that require the posting of collateral when net exposures exceed predetermined thresholds. + References No definition available. + Details
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Balance Type: | debit
Period Type: | instant

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- Definition Credit, or nonperformance, risk adjustment associated with credit loss in the event of nonperformance by our counterparties on various derivative contracts. + References No definition available. + Details
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Namespace Prefix: | lnc_
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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 -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=121549185&loc=d3e80748-113994 + 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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- Definition Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Details
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