Derivative Instruments - Schedule of Collateral Amounts With Rights to Reclaim or Obligation to Return Cash (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Credit Derivatives [Line Items]
Collateral Posted by Counter-Party (Held by LNL)	$ 6,691	$ 5,107
Collateral Posted by LNL (Held by Counter-Party)	(114)	(188)
AA-
Credit Derivatives [Line Items]
Collateral Posted by Counter-Party (Held by LNL)	3,311	2,330
Collateral Posted by LNL (Held by Counter-Party)	(71)	(63)
A+
Credit Derivatives [Line Items]
Collateral Posted by Counter-Party (Held by LNL)	2,809	2,422
Collateral Posted by LNL (Held by Counter-Party)	(43)	(125)
A
Credit Derivatives [Line Items]
Collateral Posted by Counter-Party (Held by LNL)	90	82
Collateral Posted by LNL (Held by Counter-Party)	0	0
A-
Credit Derivatives [Line Items]
Collateral Posted by Counter-Party (Held by LNL)	481	273
Collateral Posted by LNL (Held by Counter-Party)	$ 0	$ 0