Commitments and Contingencies - Commitments (Details) $ in Millions	Jul. 31, 2022 USD ($)
Unfunded Commitments
Commitments
Reserve for estimated credit losses	$ 3.5
Wholesale Receivables
Commitments
Unused commitments	8,600.0
Customer Receivables
Commitments
Unused commitments	$ 31,700.0
Minimum percentage of unused commitments to extend credit to customers that relate to revolving charge accounts	95.00%