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Investments in Operating Joint Ventures (Narrative) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Sep. 30, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | ---
Schedule of Equity Method Investments [Line Items] |  |  |  |
Investment in operating joint ventures | $ 1,192 |  | $ 1,211 | $ 1,306
Prismic HoldCo |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Equity Method Investment, Ownership Percentage |  | 20.00% |  |
Asset management fee income |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Investment in operating joint ventures | $ 10 |  | $ 1 | $ 11

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