Noncontrolling Interests - Change in Carrying Value (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Change in the carrying value of all noncontrolling interests
Carrying value at beginning of the period			$ 76,826
Allocation of net income	$ 615	$ 289	1,217	$ 585
Carrying value at end of the period	$ 76,267		$ 76,267
Realty Income, L.P.
Change in the carrying value of all noncontrolling interests
Number of partnership units outstanding (in units)	1,060,709		1,060,709		1,060,709
Noncontrolling interests
Change in the carrying value of all noncontrolling interests
Carrying value at beginning of the period			$ 76,826
Distributions			(1,776)
Allocation of net income			1,217
Carrying value at end of the period	$ 76,267		76,267
Noncontrolling interests | Realty Income, L.P.
Change in the carrying value of all noncontrolling interests
Carrying value at beginning of the period			62,416
Distributions			(1,624)
Allocation of net income			1,095
Carrying value at end of the period	61,887		61,887
Noncontrolling interests | Other Noncontrolling Interests
Change in the carrying value of all noncontrolling interests
Carrying value at beginning of the period			14,410
Distributions			(152)
Allocation of net income			122
Carrying value at end of the period	$ 14,380		$ 14,380