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Statutory Information and Restrictions - Net Gain (Loss) from Operations, Net Income (Loss), Dividends to LNC Holding Company (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Insurance [Abstract] |  |  |
U.S. net gain (loss) from operations, after-tax | $ (3,177) | $ (2,484) | $ 1,730
U.S. net income (loss) | (2,268) | (2,916) | 1,991
U.S. cash dividends to LNC holding company | $ 491 | $ 510 | $ 667

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- Definition This element represents dividends paid to the common parent company by its domestic life insurance subsidiaries. + References No definition available. + Details
Name: | lnc_DividendsToParentCompany
Namespace Prefix: | lnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount of net gain from operations, after tax, for the period determined using accounting principles prescribed or permitted by insurance regulators. + References No definition available. + Details
Name: | lnc_StatutoryAccountingPracticesStatutoryNetGainFromOperationsAfterTaxAmount
Namespace Prefix: | lnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition Amount of net income for the period determined using accounting principles prescribed or permitted by insurance regulators. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(23)(c)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
Name: | us-gaap_StatutoryAccountingPracticesStatutoryNetIncomeAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration