Noncontrolling Interests - Narrative (Details) $ in Millions		1 Months Ended			3 Months Ended	12 Months Ended
	Dec. 29, 2025 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 property shares	Jul. 31, 2024 USD ($) property shares	Dec. 31, 2025 USD ($) property entity	Dec. 31, 2025 property entity
Noncontrolling interests
Number of noncontrolling interests consolidated | entity					12	12
Number of properties owned					15,511	15,511
Conversion ratio						1.02934
Realty Income, L.P.
Noncontrolling interests
Ownership interest (as a percent)					90.05%	90.05%
Third-party partnership ownership interest (as a percent)					9.95%	9.95%
Primary Beneficiary | The Fund
Noncontrolling interests
Investment company, committed capital | $	$ 816.3	$ 716.0
Capital calls | $					$ 486.4
Number of properties owned					183	183
Ownership interest (as a percent)					69.00%	69.00%
Realty Income, L.P.
Noncontrolling interests
Number of consolidated property partnerships interests converted by joint venture partner				2
Number of partnership units issued (in units) | shares			730,020	156,621
Number of properties acquired by acquiring a controlling interest			42
Realty Income, L.P. | Common stock and paid in capital
Noncontrolling interests
Issuance of common partnership units in excess over carrying value | $				$ 0.8