Investments - Schedule of Increase (Decrease) in Payables for Collateral on Investments (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Investments [Abstract]
Collateral payable for derivative investments	$ 1,684	$ 268
Securities pledged under securities lending agreements	78	(2)
Investments pledged for FHLBI	250	(175)
Total increase (decrease) in payables for collateral on investments	$ 2,012	$ 91

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