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Cover Page - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Feb. 16, 2024
Jun. 30, 2023
Document Information [Line Items]      
Document Type 10-K    
Document Period End Date Dec. 31, 2023    
Current Fiscal Year End Date --12-31    
Entity File Number 001-06351    
Entity Registrant Name ELI LILLY AND COMPANY    
Entity Incorporation, State or Country Code IN    
Entity Tax Identification Number 35-0470950    
Entity Address, Address Line One Lilly Corporate Center    
Entity Address, City or Town Indianapolis    
Entity Address, State or Province IN    
Entity Address, Postal Zip Code 46285    
City Area Code 317    
Local Phone Number 276-2000    
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     $ 398,291
Entity Common Stock, Shares Outstanding   950,164,452  
Documents Incorporated by Reference
Portions of the Registrant's Proxy Statement for the 2024 Annual Meeting of Shareholders have been incorporated by reference into Part III of this Annual Report on Form 10-K.
    
Document Annual Report true    
Document Transition Report false    
Amendment Flag false    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Entity Central Index Key 0000059478    
Common Stock (no par value)      
Document Information [Line Items]      
Title of 12(b) Security Common Stock (no par value)    
Trading Symbol LLY    
Security Exchange Name NYSE    
7 1/8% Notes due 2025      
Document Information [Line Items]      
Title of 12(b) Security 7 1/8% Notes due 2025    
Trading Symbol LLY25    
Security Exchange Name NYSE    
1.625% Notes due 2026      
Document Information [Line Items]      
Title of 12(b) Security 1.625% Notes due 2026    
Trading Symbol LLY26    
Security Exchange Name NYSE    
2.125% Notes due 2030      
Document Information [Line Items]      
Title of 12(b) Security 2.125% Notes due 2030    
Trading Symbol LLY30    
Security Exchange Name NYSE    
0.625% Notes due 2031      
Document Information [Line Items]      
Title of 12(b) Security 0.625% Notes due 2031    
Trading Symbol LLY31    
Security Exchange Name NYSE    
0.500% Notes due 2033      
Document Information [Line Items]      
Title of 12(b) Security 0.500% Notes due 2033    
Trading Symbol LLY33    
Security Exchange Name NYSE    
6.77% Notes due 2036      
Document Information [Line Items]      
Title of 12(b) Security 6.77% Notes due 2036    
Trading Symbol LLY36    
Security Exchange Name NYSE    
1.625% Notes due 2043      
Document Information [Line Items]      
Title of 12(b) Security 1.625% Notes due 2043    
Trading Symbol LLY43    
Security Exchange Name NYSE    
1.700% Notes due 2049      
Document Information [Line Items]      
Title of 12(b) Security 1.700% Notes due 2049    
Trading Symbol LLY49A    
Security Exchange Name NYSE    
1.125% Notes due 2051      
Document Information [Line Items]      
Title of 12(b) Security 1.125% Notes due 2051    
Trading Symbol LLY51    
Security Exchange Name NYSE    
1.375% Notes due 2061      
Document Information [Line Items]      
Title of 12(b) Security 1.375% Notes due 2061    
Trading Symbol LLY61    
Security Exchange Name NYSE