Policyholder Account Balances - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Policyholder Account Balance [Line Items]
Long-term debt	$ 5,772	$ 5,856
FABN \| Sustainable Financing \| The Lincoln National Life Insurance Company
Policyholder Account Balance [Line Items]
Debt instrument, face amount		$ 5,000
Long-term debt	1,500
FABN \| Secured Debt \| The Lincoln National Life Insurance Company
Policyholder Account Balance [Line Items]
Debt instrument, face amount	$ 400

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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+ Details