Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2021	Mar. 08, 2022	Jun. 30, 2021
Document And Entity Information [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	000-55871
Entity Registrant Name	THE LINCOLN NATIONAL LIFE INSURANCE COMPANY
Entity Incorporation, State or Country Code	IN
Entity Tax Identification Number	35-0472300
Entity Address, Address Line One	1301 South Harrison Street
Entity Address, City or Town	Fort Wayne
Entity Address, State or Province	IN
Entity Address, Postal Zip Code	46802
City Area Code	260
Local Phone Number	455-2000
Title of 12(g) Security	Common Stock, par value $2.50
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		10,000,000
Entity Public Float			$ 0
Documents Incorporated by Reference [Text Block]	Documents Incorporated by Reference:  None
Amendment Flag	false
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2021
Entity Central Index Key	0000726865
Auditor Firm ID	42
Auditor Location	Philadelphia, Pennsylvania
Auditor Name	Ernst & Young LLP