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Other Assets and Liabilities - Narrative (Details) $ in Millions |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jul. 01, 2022 USD ($) | Jun. 30, 2024 USD ($) | Dec. 31, 2023 transaction | Dec. 31, 2021 transaction | Jun. 30, 2024 USD ($) partnership transaction | Jun. 30, 2023 USD ($) | Dec. 31, 2023 transaction | Dec. 31, 2021 transaction | Dec. 31, 2019 USD ($) | Dec. 31, 2018 partnership
Other Assets and Other Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |
Intangible Assets at Acquisition |  |  |  |  |  |  |  |  | $ 95 |
Amortization of intangible assets |  |  |  |  | $ 5 | $ 6 |  |  |  |
Number of partnerships consolidated | partnership |  |  |  |  | 2 |  |  |  |  | 2
Co-investors gains |  | $ 3 |  |  | $ 4 |  |  |  |  |
Number of securitization transactions co-sponsored | transaction |  |  | 2 | 2 | 2 |  | 2 | 2 |  |
Riverbend Funding, LLC |  |  |  |  |  |  |  |  |  |
Other Assets and Other Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |
Goodwill acquired during the period | $ 23 |  |  |  |  |  |  |  |  |
Co-Investors Interests |  |  |  |  |  |  |  |  |  |
Other Assets and Other Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |
Carrying value of interests |  | 25 |  |  | $ 25 |  |  |  |  |
HEI Securitization Non-Controlling Interest |  |  |  |  |  |  |  |  |  |
Other Assets and Other Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |
Carrying value of interests |  | 72 |  |  | 72 |  |  |  |  |
Co-investors gains |  | $ 7 |  |  | $ 13 |  |  |  |  |

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