Derivative Financial Instruments - External Credit Ratings of Underlyings or Referenced Assets (Details) - Index credit default swaps - USD ($) $ in Millions	Feb. 29, 2024	Nov. 30, 2023
Derivative [Line Items]
Derivative notional amount	$ 2,092.1	$ 2,345.4
Investment Grade
Derivative [Line Items]
Derivative notional amount	1,507.1	1,451.5
Non-investment Grade
Derivative [Line Items]
Derivative notional amount	$ 585.0	$ 893.9

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.

Reference 1: 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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