Derivative Instruments (Schedule Of Collateral Amounts With Rights To Reclaim Or Obligation To Return Cash) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Credit Derivatives [Line Items]
Collateral Posted by Counter-Party (Held by LNL)	$ 4,502	$ 3,200
Collateral Posted by LNL (Held by Counter-Party)	(470)	(157)
AA- [Member]
Credit Derivatives [Line Items]
Collateral Posted by Counter-Party (Held by LNL)	1,061	383
Collateral Posted by LNL (Held by Counter-Party)	(42)	(6)
A+ [Member]
Credit Derivatives [Line Items]
Collateral Posted by Counter-Party (Held by LNL)	3,326	1,718
Collateral Posted by LNL (Held by Counter-Party)	(379)	(151)
A [Member]
Credit Derivatives [Line Items]
Collateral Posted by Counter-Party (Held by LNL)	57	$ 1,099
Collateral Posted by LNL (Held by Counter-Party)	(49)
A- [Member]
Credit Derivatives [Line Items]
Collateral Posted by Counter-Party (Held by LNL)	$ 58