Interest Income and Interest Expense - Narrative (Details) - USD ($) $ in Millions	May 31, 2026	May 31, 2025
Banking and Thrift, Interest [Abstract]
Deferred income	$ 30	$ 32
Deferred loan conversion fees	$ 18	$ 21

Total carrying amount of consideration received or receivable as of the balance sheet date representing potential earnings that were not as yet recognized as revenue or other forms of income in conformity with GAAP.

No definition available.

Name:	us-gaap_DeferredRevenueAndCredits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant