Derivative Instruments - Schedule of Collateral Amounts With Rights to Reclaim or Obligation to Return Cash (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Credit Derivatives [Line Items]
Collateral Posted by Counter- Party (Held by LNC)	$ 5,229	$ 3,273
Collateral Posted by LNC (Held by Counter- Party)	(188)	(172)
AA-
Credit Derivatives [Line Items]
Collateral Posted by Counter- Party (Held by LNC)	2,378	383
Collateral Posted by LNC (Held by Counter- Party)	(63)	(6)
A+
Credit Derivatives [Line Items]
Collateral Posted by Counter- Party (Held by LNC)	2,496	1,718
Collateral Posted by LNC (Held by Counter- Party)	(125)	(166)
A
Credit Derivatives [Line Items]
Collateral Posted by Counter- Party (Held by LNC)	82	1,172
Collateral Posted by LNC (Held by Counter- Party)	0	0
A-
Credit Derivatives [Line Items]
Collateral Posted by Counter- Party (Held by LNC)	273	0
Collateral Posted by LNC (Held by Counter- Party)	$ 0	$ 0