Agreement and Plan of Merger	6 Months Ended
Agreement and Plan of Merger	Jun. 30, 2021
Business Combination and Asset Acquisition [Abstract]
Agreement and Plan of Merger	Agreement and Plan of Merger On April 29, 2021, we entered into an Agreement and Plan of Merger, as amended, or the Merger Agreement, with VEREIT, Inc., or VEREIT, its operating partnership, VEREIT Operating Partnership, L.P., or VEREIT OP, and two newly formed wholly-owned subsidiaries of us. Pursuant to the terms of the Merger Agreement, (i) one of the newly formed subsidiaries of us will merge with and into VEREIT OP, with VEREIT OP as the surviving entity, which we refer to as the Partnership Merger, and (ii) immediately thereafter, VEREIT will merge with and into the other newly formed subsidiary of us, with our subsidiary as the surviving corporation, which we refer to as the Merger and, together with the Partnership Merger, the Mergers. Pursuant to the terms of the Merger Agreement and subject to the terms thereof, upon the consummation of the Mergers, (i) each outstanding share of VEREIT common stock, and each outstanding common partnership unit of VEREIT OP owned by any of its partners other than VEREIT, Realty Income or their respective affiliates, will automatically be converted into 0.705 of a newly issued share of our common stock, subject to possible adjustment as provided in the Merger Agreement, (ii) each outstanding Series F preferred partnership unit of VEREIT OP owned by a partner other than VEREIT shall be converted into the right to receive $25.00, plus the accumulated and unpaid distributions described in the Merger Agreement, and (iii) each outstanding Series F preferred partnership unit of VEREIT OP owned by VEREIT will remain outstanding as a preferred partnership unit and each outstanding common partnership unit of VEREIT OP owned by VEREIT, Realty Income or their respective affiliates will remain outstanding as a common partnership unit in the surviving entity of VEREIT OP. Immediately prior to the Mergers, VEREIT will issue a redemption notice to redeem each share of issued and outstanding VEREIT Series F preferred stock at its redemption price in accordance with its terms. In connection with the Mergers, we and VEREIT intend to contribute some or all of our office real estate properties to a newly formed, wholly owned subsidiary, which we refer to as OfficeCo, and, following the Mergers, for us to distribute the outstanding voting shares of common stock of OfficeCo to our stockholders (including former VEREIT stockholders who receive shares of our common stock in the Mergers) on a pro rata basis, which we refer to as the Spin-Off. Following the consummation of the Spin-Off, we and VEREIT intend for OfficeCo to operate as a separate, publicly-traded REIT. Subject to the terms and conditions of the Merger Agreement, we and VEREIT may also or alternatively seek to sell some or all of the office real estate properties in connection with the closing of the Mergers or choose to retain some or all of the OfficeCo properties. The Merger Agreement contains customary covenants, representations, and warranties, as well as certain termination rights for VEREIT and us, in each case, as more fully described in the Merger Agreement. The consummation of the Mergers is also subject to certain customary closing conditions, including receipt of the approval by our stockholders and the stockholders of VEREIT. In addition, we will not be obligated to consummate the Mergers before January 29, 2022 unless the Spin-Off is ready, in all respects, to be consummated contemporaneously with the closing of the Mergers. If this condition is not satisfied or waived by us by January 29, 2022, and all other conditions to closing have been satisfied, the parties will be obligated to close the Mergers, regardless of whether the Spin-Off is ready to be consummated. Likewise, the Spin-Off is subject to various conditions and uncertainties and we and VEREIT may elect to sell some or all of the applicable office properties before the Spin-Off and we may elect not to proceed with the Spin-Off at all. In connection with the Merger, we have filed a registration statement on Form S-4 (File No. 333-256772), declared effective by the SEC on June 29, 2021, that includes a joint proxy statement of Realty Income and VEREIT. Realty Income and VEREIT have each scheduled special meetings of their respective stockholders to be held on August 12, 2021 in connection with the Mergers and related transactions. Realty Income stockholders will be asked to consider and vote on a proposal to approve the issuance of Realty Income common stock in the Mergers pursuant to the Merger Agreement. VEREIT stockholders will be asked to consider and vote on a proposal to approve the Merger, on the terms and subject to the conditions of the Merger Agreement and a proposal to approve, by advisory (non-binding) vote, the compensation that may be paid or become payable to the named executive officers of VEREIT in connection with the Merger. A. Merger-related Costs In conjunction with our proposed acquisition of VEREIT, we incurred approximately $13.3 million of merger-related transaction costs during the three and six months ended June 30, 2021. The merger-related costs incurred to date primarily consist of advisory fees, attorney fees, accountant fees and SEC filing fees. In addition, we have engaged service providers, including investment banks and advisors, to help us negotiate the terms of the Merger and to advise us on other merger-related matters. In connection with these services, we expect to be required to pay success-based fees to the extent that certain conditions, including the closing of the Merger and consummation of the Spin-Off and/or sale of OfficeCo business, are met. As of June 30, 2021, we expect to incur approximately $18.0 million of such success fees. As closing of the Merger has not occurred, no such amounts have been paid or accrued through June 30, 2021. If closing of the Merger does not occur, we would not expect to be required to pay these fees. B. Litigation Relating to the Mergers To date, purported stockholders of VEREIT filed 12 lawsuits challenging disclosures related to the Merger (Stein v. VEREIT, Inc., et. al., Case No. 1:21-cv-01409 (D. Ct. Md., June 7, 2021) (the “Stein Complaint”); Bowles v. VEREIT, Inc., et. al., Case No. 1:21-cv-00845 (D. Ct. Del., June 10, 2021) (the “Bowles Complaint”); Leach v. VEREIT, Inc., et. al., Case No. 1:21-cv-05270 (D. Ct. S.D.N.Y., June 14, 2021) (the “Leach Complaint”); Jenkins v. VEREIT, Inc., et. al., Case No. 1:21-cv-05286 (D. Ct. S.D.N.Y., June 15, 2021) (the “Jenkins Complaint”); Tacka v. VEREIT, Inc., et. al., Case No. 1:21-cv-05357 (D. Ct. S.D.N.Y., June 17, 2021) (the “Tacka Complaint”); Congregation Zichron Moishe v. VEREIT, Inc., et. al., Case No. 1:21-cv-01729 (D. Ct. Colo., June 24, 2021) (the “Congregation Zichron Moishe Complaint”); Mishra v. VEREIT, Inc., et al., Case No. 1:21-cv-01758 (D. Colo. June 28, 2021) (the “Mishra Complaint”); Walker v. VEREIT, Inc., et. al., Case No. 1:21-cv-01791 (D. Ct. Colo. July 1, 2021) (the “Walker Complaint”); Ciccotelli v. VEREIT, Inc., et. al., Case No. 2:21-cv-02983 (D. Ct. E.D. Pa. July 2, 2021) (the “Ciccotelli Complaint”); Upton v. VEREIT, Inc., et. al., Case No. 1:21-cv-06129 (D. Ct. S.D.N.Y July 16, 2021) (the “Upton Complaint”); Matten v. VEREIT, Inc., et al., Case No. 1:21-cv-06212 (S.D.N.Y. July 21, 2021) (the “Matten Complaint”); and Halberstam v. VEREIT, Inc., et al., Case No. 1:21-cv-02000 (D. Colo. July 23, 2021 (the “Halberstam Complaint”)). Purported stockholders of Realty Income filed one lawsuit challenging the disclosures related to the Merger (Boyko v. Realty Income Corp., et. al., Case No. 1:21-cv-01653 (D. Ct. Colo., June 16, 2021) (the “Boyko Complaint,” and collectively, the “Complaints”)). A stockholder of Realty Income also sent the Company a demand disclosure letter on June 30, 2021 (the “Demand Letter”). The Stein, Leach, Tacka, Matten and Halberstam Complaints name VEREIT and the members of the VEREIT board of directors as defendants. The Congregation Zichron Moishe, Mishra, Walker and Upton Complaints name VEREIT, VEREIT OP, and the members of the VEREIT board of directors as defendants. The Bowles and Ciccotelli Complaints name VEREIT, the members of the VEREIT board of directors, VEREIT OP, Realty Income, Merger Sub 1 and Merger Sub 2 as defendants. The Jenkins Complaint names VEREIT, the members of the VEREIT board of directors, Realty Income, Merger Sub 1 and Merger Sub 2 as defendants. The Boyko Complaint names Realty Income and the members of the Realty Income board of directors as defendants. The Demand Letter is addressed to Realty Income and the members of the Realty Income board of directors. The Complaints each allege generally that the entities and individual defendants named in such Complaint violated Section 14(a) and Rule 14a-9 promulgated thereunder and that the individual defendants violated Section 20(a) of the Exchange Act by preparing and disseminating a registration statement that misstates or omits certain allegedly material information. The Demand Letter includes similar allegations. Furthermore, the Jenkins Complaint also alleges that: (1) members of the VEREIT board of directors breached their fiduciary duties by entering into the transactions contemplated by the Merger Agreement through a flawed and unfair process and by failing to disclose all material information to VEREIT’s stockholders; and (2) VEREIT, Realty Income, Merger Sub 1 and Merger Sub 2 each aided and abetted such breach of fiduciary duty by the VEREIT board of directors. Each Complaint seeks, among other things, injunctive relief enjoining the consummation of the Merger, if the Merger is consummated, rescission or rescissory damages and an award of the plaintiff’s costs, including attorneys’ and experts’ fees. The defendants believe that all of the claims asserted in the Complaints are without merit and intend to defend against them vigorously. On July 30, 2021, VEREIT filed a Form 8-K containing supplemental disclosures regarding the Mergers and related transactions in response to allegations set forth in the Complaints and the Demand letter. We have determined that there is a reasonable possibility that we and/or VEREIT will incur losses associated with the Complaints and Demand letter, though the amount of the reasonably possible loss or range of losses is not expected to be material. Accordingly, no accrual for merger-related litigation matters has been recorded as of June 30, 2021. However, litigation is inherently uncertain and there can be no assurance regarding the likelihood that the defendants’ defense of the actions will be successful. The outcome of these lawsuits can’t be predicted and could have a significant impact on the timing or our ability to close the Merger. Additional lawsuits arising out of the Mergers may also be filed in the future.