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Other Assets and Liabilities - Additional Information (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 USD ($) transaction partnership | Dec. 31, 2023 transaction | Sep. 30, 2021 transaction | Dec. 31, 2023 transaction | Dec. 31, 2021 transaction | Dec. 31, 2018 partnership
Other Assets and Other Liabilities [Line Items] |  |  |  |  |  |
Number of partnerships consolidated | partnership | 2 |  |  |  |  | 2
Co-investors gains (losses) | $ 1 |  |  |  |  |
Number of securitization transactions co-sponsored | transaction | 2 | 2 | 2 | 2 | 2 |
Co-Investors Interests |  |  |  |  |  |
Other Assets and Other Liabilities [Line Items] |  |  |  |  |  |
Carrying value of interests | $ 22 |  |  |  |  |
HEI Securitization Non-Controlling Interest |  |  |  |  |  |
Other Assets and Other Liabilities [Line Items] |  |  |  |  |  |
Carrying value of interests | 65 |  |  |  |  |
Co-investors gains (losses) | $ 5 |  |  |  |  |

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- Definition Aggregate amount of net income allocated to limited partners. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480008/505-10-S99-5 + Details
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