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Derivative Financial Instruments - External Credit Ratings of Underlyings or Referenced Assets (Details) - Index credit default swaps - USD ($) $ in Millions | Feb. 28, 2026 | Nov. 30, 2025
--- | --- | ---
Derivative [Line Items] |  |
Notional amount | $ 928.3 | $ 924.6
Investment Grade |  |
Derivative [Line Items] |  |
Notional amount | 119.8 | 51.4
Non-investment Grade |  |
Derivative [Line Items] |  |
Notional amount | $ 808.5 | $ 873.2

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