Noncontrolling Interests - Change in Carrying Value (Details) $ in Thousands	1 Months Ended			12 Months Ended
	Sep. 30, 2022 USD ($) property shares	Dec. 31, 2021 USD ($) shares	Nov. 30, 2021 USD ($)	Dec. 31, 2023 USD ($) property shares	Dec. 31, 2022 USD ($) shares	Dec. 31, 2021 USD ($) shares
Change in the carrying value of all noncontrolling interests
Carrying value at beginning of the period				$ 130,140
Reallocation of equity					$ 0	$ 0
Allocation of net income				4,605	3,008	1,291
Carrying value at end of the period				165,502	130,140
Number of properties acquired by acquiring a controlling interest | property	9
Contributions by noncontrolling interests				40,097	$ 51,221	$ 43,390
Non-cash reduction of noncontrolling interest				1,500
Joint Venture Interest
Change in the carrying value of all noncontrolling interests
Contributions by noncontrolling interests				$ 39,200
Third-party partnership ownership interest (as a percent)				5.00%
Number of development joint ventures | property				2
Realty Income, L.P.
Change in the carrying value of all noncontrolling interests
Number of partnership units issued (in units) | shares	734,458
Contributions by noncontrolling interests		$ 16,600	$ 20,400
Number of partnership units outstanding (in units) | shares		1,060,709		1,795,167	1,795,167	1,060,709
Noncontrolling interests
Change in the carrying value of all noncontrolling interests
Carrying value at beginning of the period				$ 130,140	$ 76,826
Contributions				40,097	51,221
Reallocation of equity					3,210	$ (42)
Distributions				(9,340)	(4,125)
Allocation of net income				4,605	3,008
Carrying value at end of the period		$ 76,826		165,502	130,140	76,826
Contributions by noncontrolling interests	$ 51,200			40,097	51,221	43,390
Noncontrolling interests | Realty Income, L.P.
Change in the carrying value of all noncontrolling interests
Carrying value at beginning of the period				115,801	62,416
Contributions				0	51,221
Reallocation of equity					3,210
Distributions				(5,663)	(3,818)
Allocation of net income				3,934	2,772
Carrying value at end of the period		62,416		114,072	115,801	62,416
Noncontrolling interests | Other Noncontrolling Interests
Change in the carrying value of all noncontrolling interests
Carrying value at beginning of the period				14,339	14,410
Contributions				40,097	0
Reallocation of equity					0
Distributions				(3,677)	(307)
Allocation of net income				671	236
Carrying value at end of the period		$ 14,410		$ 51,430	$ 14,339	$ 14,410