Business	3 Months Ended
	Mar. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business	BusinessWelltower Inc., an S&P 500 company headquartered in Toledo, Ohio, is driving the transformation of health care infrastructure. We invest with leading seniors housing operators, post-acute providers and health systems to fund the real estate and infrastructure needed to scale innovative care delivery models and improve people’s wellness and overall health care experience. Welltower™, a real estate investment trust (“REIT”), owns interests in properties concentrated in major, high-growth markets in the United States (“U.S.”), Canada and the United Kingdom (“U.K.”), consisting of seniors housing and post-acute communities and outpatient medical properties. On March 7, 2022, we announced our intent to complete an UPREIT reorganization. In February 2022, the company formerly known as Welltower Inc. ("Old Welltower") formed WELL Merger Holdco Inc. ("New Welltower") as a wholly owned subsidiary, and New Welltower formed WELL Merger Holdco Sub Inc. ("Merger Sub") as a wholly owned subsidiary. On April 1, 2022, Merger Sub merged with and into Old Welltower, with Old Welltower continuing as the surviving corporation and a wholly owned subsidiary of New Welltower (the "Merger"). In connection with the Merger, Old Welltower's name was changed to "Welltower OP Inc.", and New Welltower inherited the name "Welltower Inc." This Quarterly Report on Form 10-Q pertains to the business and results of Old Welltower for its quarter ended March 31, 2022. Forward-looking references to dates and periods occurring after April 1, 2022 are references to Welltower Inc. (New Welltower). We have elected to co-file this report to ensure continuity of information to investors. For additional information on the UPREIT reorganization, please see our Current Reports on Form 8-K filed with the SEC on March 7, 2022 and April 1, 2022.