Noncontrolling Interests - Schedule of the Change in the Carrying Value of all Noncontrolling Interests (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Change in the carrying value of all noncontrolling interests
Carrying value at beginning of the period	$ 685,273
Contributions	1,626,801	$ 1,342
Allocation of net income	9,169	$ 1,647
Reallocation of equity	0
Carrying value at end of the period	$ 2,088,184
Realty Income, L.P. units
Noncontrolling interests
Number of partnership units outstanding (in shares)	2,681,808		2,681,808
Primary Beneficiary
Change in the carrying value of all noncontrolling interests
Carrying value at beginning of the period	$ 685,273
Contributions	1,647,374
Distributions	(10,952)
Allocation of net income	9,169
Reallocation of equity	(242,680)
Carrying value at end of the period	2,088,184
Primary Beneficiary | U.S. Core Plus Fund
Change in the carrying value of all noncontrolling interests
Carrying value at beginning of the period	477,081
Contributions	642,732
Distributions	(7,882)
Allocation of net income	7,935
Reallocation of equity	(20,936)
Carrying value at end of the period	1,098,930
Primary Beneficiary | Apollo
Change in the carrying value of all noncontrolling interests
Carrying value at beginning of the period	0
Contributions	1,000,000
Distributions	0
Allocation of net income	0
Reallocation of equity	(221,744)
Carrying value at end of the period	778,256
Primary Beneficiary | Realty Income, L.P. units
Change in the carrying value of all noncontrolling interests
Carrying value at beginning of the period	165,663
Contributions	0
Distributions	(2,237)
Allocation of net income	1,412
Reallocation of equity	0
Carrying value at end of the period	164,838
Primary Beneficiary | Other Noncontrolling Interests
Change in the carrying value of all noncontrolling interests
Carrying value at beginning of the period	42,529
Contributions	4,642
Distributions	(833)
Allocation of net income	(178)
Reallocation of equity	0
Carrying value at end of the period	$ 46,160