Derivative Instruments (Cumulative Basis Adjustments For Fair Value Hedges) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Fixed Maturity AFS Securities [Member]
Derivatives, Fair Value [Line Items]
Amortized cost of the hedged assets	$ 597	$ 764
Cumulative fair value hedging adjustment included in the amortized cost of the hedged assets	47	211
Long-term Debt [Member]
Derivatives, Fair Value [Line Items]
Amortized cost of the hedged liabilities	(699)	(854)
Cumulative fair value hedging adjustment included in the amortized cost of the hedged liabilities	176	21
Discontinued Hedges [Member]
Derivatives, Fair Value [Line Items]
Cumulative fair value hedging adjustment included in the amortized cost of the hedged liabilities	$ (345)	$ (356)

Amortized cost of hedged asset

No definition available.

Name:	lnc_AmortizedCostOfHedgedAsset
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost of hedged liabilities

+ References

No definition available.

+ Details

Name:	lnc_AmortizedCostOfHedgedLiabilities
Namespace Prefix:	lnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativesFairValueLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of cumulative increase (decrease) in fair value of hedged asset in fair value hedge, attributable to hedged risk.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4EE
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL109999712-113959

+ Details

Name:	us-gaap_HedgedAssetFairValueHedgeCumulativeIncreaseDecrease
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of cumulative increase (decrease) in fair value of hedged liability in fair value hedge, attributable to hedged risk.

+ References

+ Details

Name:	us-gaap_HedgedLiabilityFairValueHedgeCumulativeIncreaseDecrease
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_FixedMaturitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_LongTermDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=lnc_DiscontinuedHedgesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: