Noncontrolling Interests - Schedule of the Change in the Carrying Value of all Noncontrolling Interests (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Change in the carrying value of all noncontrolling interests
Carrying value at beginning of the period			$ 685,273
Contributions	$ 317,382	$ 187	1,944,183	$ 1,529
Allocation of net income	26,558	$ 2,092	35,727	$ 3,739
Reallocation of equity	0		0
Purchase of noncontrolling interests	(3,530)		(3,530)
Carrying value at end of the period	$ 2,384,520		$ 2,384,520
Realty Income, L.P. units
Noncontrolling interests
Number of partnership units outstanding (in shares)	2,681,808		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			1,964,897
Distributions			(29,990)
Allocation of net income			35,727
Reallocation of equity			(271,093)
Purchase of noncontrolling interests			(294)
Carrying value at end of the period	$ 2,384,520		2,384,520
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			960,186
Distributions			(23,180)
Allocation of net income			15,146
Reallocation of equity			(32,593)
Purchase of noncontrolling interests			0
Carrying value at end of the period	1,396,640		1,396,640
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			17,376
Reallocation of equity			(238,500)
Purchase of noncontrolling interests			0
Carrying value at end of the period	778,876		778,876
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			(4,505)
Allocation of net income			3,237
Reallocation of equity			0
Purchase of noncontrolling interests			0
Carrying value at end of the period	164,395		164,395
Primary Beneficiary | Other Noncontrolling Interests
Change in the carrying value of all noncontrolling interests
Carrying value at beginning of the period			42,529
Contributions			4,711
Distributions			(2,305)
Allocation of net income			(32)
Reallocation of equity			0
Purchase of noncontrolling interests			(294)
Carrying value at end of the period	$ 44,609		$ 44,609