Commitments and Contingencies - Commitments (Details) $ in Millions	Jul. 31, 2016 USD ($)
Commitments
Restricted other assets	$ 21.2
John Deere dealers
Commitments
Unused commitments	8,400.0
Customers
Commitments
Unused commitments	$ 27,800.0
Minimum percentage of unused commitments to extend credit to customers that relate to revolving charge accounts	95.00%