Noncontrolling Interests - Schedule of the Change in the Carrying Value of all Noncontrolling Interests (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Change in the carrying value of all noncontrolling interests
Carrying value at beginning of the period	$ 210,948	$ 165,502
Contributions	488,455	2,022	$ 40,097
Distributions	(12,041)	(10,398)
Allocation of net income	11,193	6,569	4,605
Issuance of common partnership units		47,253
Reallocation of equity	(13,282)
Carrying value at end of the period	685,273	210,948	165,502
U.S. Private Fund Business
Change in the carrying value of all noncontrolling interests
Carrying value at beginning of the period	0	0
Contributions	486,400	0
Distributions	0	0
Allocation of net income	3,963	0
Issuance of common partnership units		0
Reallocation of equity	(13,282)
Carrying value at end of the period	$ 477,081	$ 0	$ 0
Realty Income, L.P. units
Noncontrolling interests
Number of partnership units outstanding (in shares)	2,681,808	2,681,808	1,795,167
Change in the carrying value of all noncontrolling interests
Carrying value at beginning of the period	$ 167,803	$ 114,072
Contributions	0	0
Distributions	(8,897)	(6,810)
Allocation of net income	6,757	5,898
Issuance of common partnership units		54,643
Reallocation of equity	0
Carrying value at end of the period	165,663	167,803	$ 114,072
Other Noncontrolling Interests
Change in the carrying value of all noncontrolling interests
Carrying value at beginning of the period	43,145	51,430
Contributions	2,055	2,022
Distributions	(3,144)	(3,588)
Allocation of net income	473	671
Issuance of common partnership units		(7,390)
Reallocation of equity	0
Carrying value at end of the period	$ 42,529	$ 43,145	$ 51,430