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Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Feb. 10, 2023 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Schedule of Equity Method Investments [Line Items] |  |  |  |
Straight line rent receivable, net of allowances |  | $ 338 | $ 310 |
Residency agreement term, minimum |  | 30 days |  |
Residency agreement term, maximum |  | 1 year |  |
Maximum period available for occupancy from cessation of significant construction activity |  | 1 year |  |
Initial direct costs |  | $ 204 | 172 |
Advertising expense |  | $ 9 | $ 8 | $ 8
Healthpeak OP |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Noncontrolling interest, ownership percentage by parent | 100.00% |  |  |
Healthpeak OP | Total Noncontrolling Interests |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Common stock, unit redemption share amount | 1 |  |  |
Building and Building Improvements |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Property, plant and equipment, useful life |  | 50 years |  |

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