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Derivative Financial Instruments - Schedule of CDS Notional Amounts by Credit Rating And Fair Value of Protection Sold (Details) - Credit default contracts $ in Millions | Sep. 30, 2025 USD ($)
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Derivative [Line Items] |
Notional amount | $ 500
Fair value | 12
AAA |
Derivative [Line Items] |
Notional amount | 0
AA |
Derivative [Line Items] |
Notional amount | 0
A |
Derivative [Line Items] |
Notional amount | 0
BBB |
Derivative [Line Items] |
Notional amount | 500
BB and lower |
Derivative [Line Items] |
Notional amount | $ 0

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