Shares and Stockholders’ Equity - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Stockholders' Equity Note [Abstract]
Deferred compensation plan mark to market adjustment	$ (3)	$ 3

Mark to market adjustments of the entity's stock associated with non-employee directors' deferred compensation plans.

No definition available.

Name:	lnc_DeferredCompensationPlanMarkToMarketAdjustment
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration