Commitments and Contingencies - Commitments (Details) $ in Millions	Jan. 31, 2021 USD ($)
Limited Liability Company John Deere Financial
Commitments
Unused commitments	$ 227.6
John Deere dealers
Commitments
Unused commitments	9,600.0
Customers
Commitments
Unused commitments	$ 29,200.0
Minimum percentage of unused commitments to extend credit to customers that relate to revolving charge accounts	95.00%