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Investments - Mortgage Loans (Details) - Commercial Real Estate - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Mortgage Loans on Real Estate [Line Items] |  |  |  |
New mortgage loans | $ 48 | $ 125 | $ 145 | $ 262
Mortgage loans fully repaid | 28 | 33 | 92 | 67
Mortgage loans foreclosed | $ 0 | $ 0 | $ 0 | $ 0

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