Supplemental Disclosures of Cash Flow Information - Summary (Details) $ in Thousands, £ in Millions	1 Months Ended	9 Months Ended
	Sep. 30, 2022 property shares	Sep. 30, 2022 USD ($) mortgage	Sep. 30, 2021 USD ($) mortgage property	Sep. 30, 2021 GBP (£) mortgage property
Supplemental disclosures:
Cash paid for interest		$ 363,518	$ 229,465
Cash paid for income taxes		42,225	$ 9,776
Non-cash activities:
Number of mortgages assumed | property			1	1
Realty Income, L.P.
Non-cash activities:
Issuance of common partnership units of Realty Income, L.P.		51,221	$ 0
Number of partnership units issued (in units) | shares	734,458
Properties acquired | property	9
Mortgages
Non-cash activities:
Mortgages assumed at fair value		$ 45,079	$ 43,779	£ 31.0
Number of mortgages assumed | mortgage		8	1	1
Derivative
Non-cash activities:
Net increase in fair value of derivatives		$ 146,310	$ 75,279