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Master Transactions and Cooperation Agreement with Brookdale (Details) |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jan. 31, 2020 USD ($) property | May 31, 2021 USD ($) property | Dec. 31, 2020 USD ($) property | Oct. 31, 2019 USD ($) property | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Jan. 31, 2021 property
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |
Capital investment |  |  | $ 5,000,000 |  |  |  | $ 5,000,000 |
Gain upon change of control, net |  |  |  |  | $ 311,438,000 | $ 1,042,000 | 159,973,000 |
Long-term debt |  |  |  |  | 6,497,613,000 |  |  |
Gain (loss) on sales of real estate, net |  |  |  |  | $ 9,078,000 | $ 190,590,000 | $ 90,350,000 |
Discount rate | Minimum |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |
Real estate capitalization rate | 0.10 |  |  |  |  |  |  |
Discount rate | Maximum |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |
Real estate capitalization rate | 0.12 |  |  |  |  |  |  |
Measurement Input Annual Rent Escalators | Minimum |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |
Real estate capitalization rate | 0.02 |  |  |  |  |  |  |
Measurement Input Annual Rent Escalators | Maximum |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |
Real estate capitalization rate | 0.03 |  |  |  |  |  |  |
Cap rate | Minimum |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |
Real estate capitalization rate | 0.07 |  |  |  |  |  |  |
Cap rate | Maximum |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |
Real estate capitalization rate | 0.09 |  |  |  |  |  |  |
Brookedale MTCA |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |
Number of properties disposed | property | 18 |  |  |  |  |  |  |
Cash proceeds | $ 385,000,000 |  |  |  |  |  |  |
Gain (loss) on sales of real estate, net | $ 164,000,000 |  |  |  |  |  |  |
Brookedale MTCA | CCRC JV Investment |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |
Property count | property | 15 |  |  |  |  |  |  |
Number of properties acquired | property | 13 |  |  |  |  |  |  |
Equity method investments | $ 323,000,000 |  |  |  |  |  |  |
Real estate and intangible assets | 1,800,000,000 |  |  |  |  |  |  |
Refundable entrance fee liabilities | 308,000,000 |  |  |  |  |  |  |
Non refundable entrance fee liabilities | 436,000,000 |  |  |  |  |  |  |
Long-term debt | 215,000,000 |  |  |  |  |  |  |
Working capital | 48,000,000 |  |  |  |  |  |  |
Payments to acquire equity method investments | 396,000,000 |  |  |  |  |  |  |
Brookedale MTCA | CCRC JV Investment | Government grant income recorded in other income (expense), net |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |
Gain upon change of control, net | $ 170,000,000 |  |  |  |  |  |  |
Brookedale MTCA | 2019 Amended Master Lease |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |
Number of properties to be restructured | property | 24 |  |  |  |  |  |  | 24
Number of leases to be terminated (in properties) | property | 1 |  | 1 |  |  |  |  |
Annual rent escalator | 2.40% |  |  |  |  |  |  |
Percent of sales proceeds | 6.50% |  |  |  |  |  |  |
Number of properties to be reallocated | property | 14 |  |  |  |  |  |  |
Amount of future rent to be paid | $ 20,000,000 |  |  |  |  |  |  |
Capital investment |  |  |  | $ 35,000,000 |  |  |  |
Capital investment term |  |  |  | 5 years |  |  |  |
Annual percentage increase |  |  |  | 7.00% |  |  |  |
CCRC JV Investment |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |
Investment ownership percentage | 49.00% | 49.00% |  |  |  |  |  |
Proceeds from sale of buildings |  | $ 19,000,000 |  |  |  |  |  |
CCRC JV Investment | Brookedale MTCA |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |
Interest acquired | 51.00% |  |  |  |  |  |  |
Purchase cost | $ 1,060,000,000.00 |  |  |  |  |  |  |
Non-cash lease and management fee termination loss (income), net | $ 100,000,000 |  |  |  |  |  |  |
Number of assets sold | property |  | 2 |  |  |  |  |  |
Proceeds from sale of buildings |  | $ 38,000,000 |  |  |  |  |  |
Other Non-Reporting Segment | CCRC JV Investment |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |
Property count | property |  |  |  | 15 |  |  |  |
Senior Housing Triple Net |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |
Property count | property |  |  |  | 43 |  |  |  |

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