Derivative Financial Instruments - External Credit Ratings of Underlyings or Referenced Assets (Details) - Index credit default swaps - USD ($) $ in Millions	Feb. 28, 2025	Nov. 30, 2024
Derivative [Line Items]
Notional amount	$ 2,352.1	$ 948.6
Investment Grade
Derivative [Line Items]
Notional amount	1,746.9	395.2
Non-investment Grade
Derivative [Line Items]
Notional amount	$ 605.2	$ 553.4

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

Name:	us-gaap_DerivativeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration