Cover - shares	6 Months Ended
	Jun. 30, 2023	Jul. 31, 2023
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2023
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 Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		708,787,568
Entity Central Index Key	0000726728
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
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
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	O30A
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
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