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Private Loans - Credit Ratings For Private Loans (Details) - Private loans - USD ($) $ in Millions | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | $ 2,725 | $ 194
A or higher |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 1,392 | 0
BBB |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 259 | 0
BB and below |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 652 | 194
Unrated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | $ 422 | $ 0

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