Supplemental Disclosures of Cash Flow Information - Schedule of Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Supplemental disclosures:
Cash paid for interest	$ 1,072,484	$ 970,009	$ 692,004
Cash paid for income taxes	49,785	32,278	12,283
Non-cash activities:
Net (decrease) increase in fair value of derivatives	(163,318)	64,092	(116,145)
Increase in noncontrolling interests from property acquisitions	0	0	39,156
Realty Income, L.P.
Non-cash activities:
Issuance/conversion of common partnership units of Realty Income, L.P.	0	47,253	0
Term loans assumed at fair value
Non-cash activities:
Term loans and notes payable assumed at fair value	0	1,300,000	0
Notes payable assumed at fair value
Non-cash activities:
Term loans and notes payable assumed at fair value	$ 0	$ 2,481,486	$ 0