Supplemental Disclosures of Cash Flow Information - Summary (Details) $ in Thousands, £ in Millions	1 Months Ended			12 Months Ended
	Sep. 30, 2022 property	Dec. 31, 2021 USD ($) shares	Nov. 30, 2021 USD ($) shares	Dec. 31, 2022 USD ($) mortgage property shares	Dec. 31, 2021 USD ($)	Dec. 31, 2021 mortgage	Dec. 31, 2021 sterlingDenominatedMortgage	Dec. 31, 2021 property	Dec. 31, 2021 GBP (£)	Dec. 31, 2020 USD ($)
Supplemental disclosures:
Cash paid for interest				$ 501,716	$ 355,483					$ 285,617
Cash paid for income taxes				45,031	19,676					13,128
Cash paid for merger and integration-related costs				22,783	157,115					0
Non-cash activities:
Notes payable assumed at fair value				0	4,946,965					0
Non-cash assets and liabilities assumed in merger				0	11,559,875					0
Non-cash assets and liabilities distributed in Orion Divestiture				0	1,142,121					0
Number of mortgages assumed | property								1
Contributions by noncontrolling interests				51,221	43,390					3,168
Realty Income, L.P.
Non-cash activities:
Issuance of common partnership units of Realty Income, L.P.				$ 51,221	38,783					0
Number of partnership units issued (in units) | shares		240,586	300,604	734,458
Properties acquired | property	9			9
Contributions by noncontrolling interests		$ 16,600	$ 20,400
Realty Income, L.P. | VEREIT Inc
Non-cash activities:
Number of partnership units issued (in units) | shares			56,400
Contributions by noncontrolling interests			$ 1,800
Mortgages
Non-cash activities:
Mortgages assumed at fair value				$ 45,079	911,525				£ 31.0	0
Number of mortgages assumed				8		11	1
Mortgages | VEREIT Inc
Non-cash activities:
Mortgages assumed at fair value					869,100
Number of mortgages assumed | mortgage						10
Derivative
Non-cash activities:
Net increase (decrease) in fair value of derivatives				$ 58,753	$ 40,489					$ (55,205)