Securitization Activities - Activity Related to Securitizations Accounted for as Sales (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
May 31, 2025	May 31, 2024	May 31, 2025	May 31, 2024
Transfers and Servicing [Abstract]
Transferred assets	$ 2,591.4	$ 1,910.0	$ 2,633.4	$ 3,412.0
Proceeds on new securitizations	2,591.4	1,910.0	2,633.4	3,412.0
Cash flows received on retained interests	$ 6.5	$ 9.0	$ 11.1	$ 19.1

Cash Flows between a transferor and a transferee attributable to newly transferred assets related to either a securitization, asset-backed financing arrangement, or similar transfer in which the transferor has continuing involvement with the transferred financial assets underlying the transaction (including, but not limited to, servicing, recourse, and restrictions on transferor's interests in the transferred financial assets).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 860
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (d)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481326/860-20-50-3

Name:	us-gaap_CashFlowsBetweenTransfereeAndTransferorProceedsFromNewTransfers
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration