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Cover - USD ($)
$ in Billions
 12 Months Ended
Dec. 31, 2023
Feb. 16, 2024
Jun. 30, 2023
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 1-6028    
Entity Registrant Name LINCOLN NATIONAL CORPORATION    
Entity Incorporation, State or Country Code IN    
Entity Tax Identification Number 35-1140070    
Entity Address, Address Line One 150 N. Radnor-Chester Road    
Entity Address, Address Line Two Suite A305    
Entity Address, City or Town Radnor    
Entity Address, State or Province PA    
Entity Address, Postal Zip Code 19087    
City Area Code 484    
Local Phone Number 583-1400    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 3.8
Entity Common Stock, Shares Outstanding   169,668,780  
Documents Incorporated by Reference
Selected portions of the Proxy Statement for the Annual Meeting of Shareholders, scheduled for May 23, 2024, have been incorporated by reference into Part III of this Form 10-K.
    
Entity Central Index Key 0000059558    
Amendment Flag false    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Common Stock      
Document Information [Line Items]      
Title of 12(b) Security Common Stock    
Trading Symbol LNC    
Security Exchange Name NYSE    
Depositary Shares, each representing a 1/1000th interest in a share of 9.000% Non-Cumulative Preferred Stock, Series D      
Document Information [Line Items]      
Title of 12(b) Security Depositary Shares, each representing a 1/1000th interest in a shareof 9.000% Non-Cumulative Preferred Stock, Series D    
Trading Symbol LNC PRD    
Security Exchange Name NYSE