Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2020	Nov. 05, 2020
Document And Entity Information [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
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	1300 South Clinton 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
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
Amendment Flag	false
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2020
Entity Central Index Key	0000726865