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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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Derivative Assets (Liabilities), Notional Amount

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 20
-Name Accounting Standards Codification
-Section 25
-Paragraph 6A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480682/815-20-25-6A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480237/815-40-50-5

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