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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.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount, after allowance for credit loss, recoverable under reinsurance for contract or contract feature in long-duration contract issued by insurance entity that both protects contract holder from other-than-nominal capital market risk and exposes insurance entity to other-than-nominal capital market risk.

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Amount, after valuation allowance, recoverable under reinsurance contracts including premium paid under reinsurance contracts. Examples include, but are not limited to, settled and unsettled claims, incurred but not reported losses, loss adjustment expense, premium paid, policy benefits and policy reserves.

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Amount of allowance for credit loss on reinsurance recoverable.

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Amount before valuation allowance recoverable under reinsurance contracts. Examples include, but are not limited to, settled and unsettled claims, incurred but not reported losses, loss adjustment expense, premium paid, policy benefits and policy reserves.

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Reinsurance - Reinsurance Recoverables (Details) $ in Millions	3 Months Ended
	Mar. 31, 2025 USD ($) reinsurer	Mar. 31, 2024 USD ($)
Ceded Credit Risk [Line Items]
Reinsurance recoverables before market risk benefits	$ 3,676
Allowance for uncollectible reinsurance	(31)
Market risk benefits	876	$ 951
Total reinsurance recoverables	4,521
Other Current Assets
Ceded Credit Risk [Line Items]
Total reinsurance recoverables	146
Fair Value of Collateral Contractually Required to Meet or Exceed Carrying Value of Recoverable
Ceded Credit Risk [Line Items]
Reinsurance recoverables before market risk benefits	405
Collateral provisions exist that may mitigate risk of credit loss
Ceded Credit Risk [Line Items]
Reinsurance recoverables before market risk benefits	2,819
No Collateral
Ceded Credit Risk [Line Items]
Reinsurance recoverables before market risk benefits	452
BBB+ equivalent and higher current ratings \| Acquisition, disposition or run-off activities
Ceded Credit Risk [Line Items]
Reinsurance recoverables before market risk benefits	$ 3,316
Number of reinsurers \| reinsurer	6
BBB+ equivalent and higher current ratings \| Acquisition, disposition or run-off activities \| The Lincoln National Life Insurance Company And Lincoln Life And Annuity Of New York
Ceded Credit Risk [Line Items]
Number of reinsurers \| reinsurer	2
BBB+ equivalent and higher current ratings \| Acquisition, disposition or run-off activities \| The Lincoln National Life Insurance Company And Lincoln Life And Annuity Of New York \| Reinsurer Concentration Risk \| Reinsurance Recoverables, Gross, Acquisition Disposition Runoff Activities, Nationally Recognized Statistical Rating Organizations, BBB+ Or Higher
Ceded Credit Risk [Line Items]
Concentration percentage	75.00%
BBB+ equivalent and higher current ratings \| Acquisition, disposition or run-off activities \| Fair Value of Collateral Contractually Required to Meet or Exceed Carrying Value of Recoverable
Ceded Credit Risk [Line Items]
Reinsurance recoverables before market risk benefits	$ 304
BBB+ equivalent and higher current ratings \| Acquisition, disposition or run-off activities \| Collateral provisions exist that may mitigate risk of credit loss
Ceded Credit Risk [Line Items]
Reinsurance recoverables before market risk benefits	2,804
BBB+ equivalent and higher current ratings \| Acquisition, disposition or run-off activities \| No Collateral
Ceded Credit Risk [Line Items]
Reinsurance recoverables before market risk benefits	208
A- equivalent and higher current ratings \| Ongoing operations
Ceded Credit Risk [Line Items]
Reinsurance recoverables before market risk benefits	183
A- equivalent and higher current ratings \| Ongoing operations \| Fair Value of Collateral Contractually Required to Meet or Exceed Carrying Value of Recoverable
Ceded Credit Risk [Line Items]
Reinsurance recoverables before market risk benefits	0
A- equivalent and higher current ratings \| Ongoing operations \| Collateral provisions exist that may mitigate risk of credit loss
Ceded Credit Risk [Line Items]
Reinsurance recoverables before market risk benefits	6
A- equivalent and higher current ratings \| Ongoing operations \| No Collateral
Ceded Credit Risk [Line Items]
Reinsurance recoverables before market risk benefits	177
BBB- to BBB+ equivalent current credit ratings \| Ongoing operations
Ceded Credit Risk [Line Items]
Reinsurance recoverables before market risk benefits	63
BBB- to BBB+ equivalent current credit ratings \| Ongoing operations \| Fair Value of Collateral Contractually Required to Meet or Exceed Carrying Value of Recoverable
Ceded Credit Risk [Line Items]
Reinsurance recoverables before market risk benefits	0
BBB- to BBB+ equivalent current credit ratings \| Ongoing operations \| Collateral provisions exist that may mitigate risk of credit loss
Ceded Credit Risk [Line Items]
Reinsurance recoverables before market risk benefits	0
BBB- to BBB+ equivalent current credit ratings \| Ongoing operations \| No Collateral
Ceded Credit Risk [Line Items]
Reinsurance recoverables before market risk benefits	63
Not rated \| Ongoing operations
Ceded Credit Risk [Line Items]
Reinsurance recoverables before market risk benefits	107
Not rated \| Ongoing operations \| Fair Value of Collateral Contractually Required to Meet or Exceed Carrying Value of Recoverable
Ceded Credit Risk [Line Items]
Reinsurance recoverables before market risk benefits	101
Not rated \| Ongoing operations \| Collateral provisions exist that may mitigate risk of credit loss
Ceded Credit Risk [Line Items]
Reinsurance recoverables before market risk benefits	3
Not rated \| Ongoing operations \| No Collateral
Ceded Credit Risk [Line Items]
Reinsurance recoverables before market risk benefits	3
Not rated \| Acquisition, disposition or run-off activities
Ceded Credit Risk [Line Items]
Reinsurance recoverables before market risk benefits	7
Not rated \| Acquisition, disposition or run-off activities \| Fair Value of Collateral Contractually Required to Meet or Exceed Carrying Value of Recoverable
Ceded Credit Risk [Line Items]
Reinsurance recoverables before market risk benefits	0
Not rated \| Acquisition, disposition or run-off activities \| Collateral provisions exist that may mitigate risk of credit loss
Ceded Credit Risk [Line Items]
Reinsurance recoverables before market risk benefits	6
Not rated \| Acquisition, disposition or run-off activities \| No Collateral
Ceded Credit Risk [Line Items]
Reinsurance recoverables before market risk benefits	$ 1