Investments (Schedule Of Increase (Decrease) In Payables For Collateral On Investments) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Increase (decrease) in payables for collateral on investments
Collateral payable for derivative investments	$ 268	$ (786)
Securities pledged under securities lending agreements	(2)	17
Investments pledged for FHLBI	(175)	750
Total increase (decrease) in payables for collateral on investments	$ 91	$ (19)

The net change during the reporting period in the amount of cash that is received related to securities pledged for Federal Home Loan Bank of Indianapolis.

No definition available.

Name:	lnc_IncreaseDecreaseInCashCollateralForSecuritiesPledgedForFhlbi
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration