Investments (Schedule Of Increase (Decrease) In Payables For Collateral On Investments) (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021
Increase (decrease) in payables for collateral on investments
Collateral payable for derivative investments	$ (2,140)	$ 1,973
Securities pledged under securities lending agreements	59	184
Total increase (decrease) in payables for collateral on investments	$ (2,081)	$ 2,157

The net change during the reporting period in the amount of cash that is received related to securities pledged under securities lending agreements.

No definition available.

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