Voluntary Employee Separation Progaram (Details) - Voluntary Employee Separation Program - USD ($) $ in Millions	3 Months Ended
Jul. 30, 2017	Apr. 30, 2017	Jan. 29, 2017	Oct. 30, 2016
Voluntary Employee Separation Program
Total voluntary employee separation program's expenses, pretax	$ 8.4
Incurred voluntary employee separation program's expenses, pretax	$ 0.5	$ 0.8	$ 6.9	$ 0.2

Discloses the pretax amount incurred and charged against earnings during the period for the voluntary employee separation programs' expenses.

No definition available.

Name:	jdcc_VoluntaryEmployeeSeparationProgramsExpensesIncurredPretax
Namespace Prefix:	jdcc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration