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Description of Business (Details)	1 Months Ended	2 Months Ended	12 Months Ended
Description of Business (Details)	Jun. 30, 2020 USD ($)	Feb. 18, 2022 USD ($)	Dec. 31, 2021 USD ($) property tenant	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Real estate properties
Number of real estate properties \| property			1,200
Real Estate Investments, Net			$ 22,870,429,000	$ 21,599,290,000
Deferred Tax Assets, Valuation Allowance			198,450,000	127,279,000	$ 40,114,000
COVID-19 Impact
Real estate properties
HHS Grants Received of Provider Relief Fund			15,400,000	35,100,000
Unusual or Infrequent Item, or Both, Charges, Amount			$ 0
Allowance for Loan and Lease Losses, Write-offs				74,600,000
Real estate impairments related to natural disasters				$ 126,500,000
Impairment Of Real Estate Percent Of Total				1.00%
Financing Receivable, Allowance for Credit Loss, Writeoff				$ 34,700,000
Financing Receivable, Allowance for Credit Loss				10,500,000
Equity Method Investment, Other than Temporary Impairment	$ 10,700,000			10,700,000
Deferred Tax Assets, Valuation Allowance				56,400,000
COVID-19 Impact \| Subsequent Event
Real estate properties
HHS Grants Received of Provider Relief Fund		$ 34,000,000
COVID-19 Impact \| Fair Value
Real estate properties
Real Estate Investments, Net				$ 239,900,000
Brookdale Senior Living
Real estate properties
Number of real estate properties \| property			121
Concentration risk, number of tenants \| tenant			3
Ardent
Real estate properties
Number of real estate properties \| property			12
Kindred
Real estate properties
Number of real estate properties \| property			31
Triple-net leased properties
Real estate properties
Number of real estate properties \| property			332
Senior Housing
Real estate properties
Number of independent third party managed properties \| property			554