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Cover - USD ($)
$ in Billions
 12 Months Ended
Dec. 31, 2024
Feb. 20, 2025
Jun. 30, 2024
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2024    
Current Fiscal Year End Date (tagged on cover in 10K) --12-31    
Document Transition Report false    
Entity File Number 1-13374    
Entity Registrant Name REALTY INCOME CORPORATION    
Entity Incorporation, State or Country Code MD    
Entity Tax Identification Number 33-0580106    
Entity Address, Address Line One 11995 El Camino Real    
Entity Address, City or Town San Diego    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 92130    
City Area Code 858    
Local Phone Number 284-5000    
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     $ 45.9
Entity Common Stock, Shares Outstanding   891,516,161  
Documents Incorporated by Reference
DOCUMENTS INCORPORATED BY REFERENCE
Part III, Items 10, 11, 12, 13, and 14 incorporate by reference certain specific portions of the definitive Proxy Statement for Realty Income Corporation’s Annual Meeting expected to be held on May 13, 2025, to be filed pursuant to Regulation 14A. Only those portions of the proxy statement which are specifically incorporated by reference herein shall constitute a part of this Annual Report on Form 10-K for the year ended December 31, 2024 (this "annual report").
    
Entity Central Index Key 0000726728    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Amendment Flag false    
Common Stock, $0.01 Par Value      
Document Information [Line Items]      
Title of 12(b) Security Common Stock, $0.01 Par Value    
Trading Symbol O    
Security Exchange Name NYSE    
1.125% Notes due 2027      
Document Information [Line Items]      
Title of 12(b) Security 1.125% Notes due 2027    
Trading Symbol O27A    
Security Exchange Name NYSE    
1.875% Notes due 2027      
Document Information [Line Items]      
Title of 12(b) Security 1.875% Notes due 2027    
Trading Symbol O27B    
Security Exchange Name NYSE    
5.000% Notes due 2029      
Document Information [Line Items]      
Title of 12(b) Security 5.000% Notes due 2029    
Trading Symbol O29B    
Security Exchange Name NYSE    
1.625% Notes due 2030      
Document Information [Line Items]      
Title of 12(b) Security 1.625% Notes due 2030    
Trading Symbol O30    
Security Exchange Name NYSE    
4.875% Notes due 2030      
Document Information [Line Items]      
Title of 12(b) Security 4.875% Notes due 2030    
Trading Symbol O30B    
Security Exchange Name NYSE    
5.750% Notes due 2031      
Document Information [Line Items]      
Title of 12(b) Security 5.750% Notes due 2031    
Trading Symbol O31A    
Security Exchange Name NYSE    
1.750% Notes due 2033      
Document Information [Line Items]      
Title of 12(b) Security 1.750% Notes due 2033    
Trading Symbol O33A    
Security Exchange Name NYSE    
5.125% Notes due 2034      
Document Information [Line Items]      
Title of 12(b) Security 5.125% Notes due 2034    
Trading Symbol O34    
Security Exchange Name NYSE    
6.000% Notes due 2039      
Document Information [Line Items]      
Title of 12(b) Security 6.000% Notes due 2039    
Trading Symbol O39    
Security Exchange Name NYSE    
5.250% Notes due 2041      
Document Information [Line Items]      
Title of 12(b) Security 5.250% Notes due 2041    
Trading Symbol O41    
Security Exchange Name NYSE    
2.500% Notes due 2042      
Document Information [Line Items]      
Title of 12(b) Security 2.500% Notes due 2042    
Trading Symbol O42    
Security Exchange Name NYSE