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Private Loans - Credit Ratings For Private Loans (Details) - Private loans - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | $ 5,732 | $ 194
A or higher |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 1,443 | 0
BBB |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 669 | 0
BB and below |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 710 | 194
Unrated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | $ 2,910 | $ 0

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