Allowance for Credit Losses and Credit Quality of Receivables - Allowance for Credit Losses (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Allowance:
Beginning of year balance	$ 109.8	$ 112.4	$ 111.4
Provision (credit) for credit losses	68.8	32.3	27.3
Write-offs	(91.3)	(55.9)	(45.7)
Recoveries	24.9	22.6	20.2
Other changes (primarily translation adjustments)	(0.5)	(1.6)	(0.8)
End of year balance	111.7	109.8	112.4
Balance individually evaluated	2.6	1.2	2.0
Receivables:
End of year balance	27,714.5	29,092.4	30,505.9
Balance individually evaluated	54.3	32.1	25.9
Retail notes
Allowance:
Beginning of year balance	53.3	56.1	50.7
Provision (credit) for credit losses	27.3	9.4	13.2
Write-offs	(29.9)	(17.8)	(12.7)
Recoveries	5.8	6.5	5.5
Other changes (primarily translation adjustments)	(0.2)	(0.9)	(0.6)
End of year balance	56.3	53.3	56.1
Balance individually evaluated	2.3		1.7
Receivables:
End of year balance	17,468.2	18,659.0	19,461.3
Balance individually evaluated	44.5	20.2	24.5
Revolving charge accounts
Allowance:
Beginning of year balance	39.7	39.9	39.7
Provision (credit) for credit losses	35.8	20.7	10.5
Write-offs	(54.3)	(36.2)	(24.6)
Recoveries	18.5	15.3	14.3
End of year balance	39.7	39.7	39.9
Balance individually evaluated			0.2
Receivables:
End of year balance	3,078.5	2,680.8	2,535.9
Balance individually evaluated	8.4	0.2	0.2
Wholesale receivables
Allowance:
Beginning of year balance	8.1	7.6	6.4
Provision (credit) for credit losses	3.1	0.6	9.0
Write-offs	(4.1)	(0.3)	(7.7)
Recoveries	0.1	0.6	0.1
Other changes (primarily translation adjustments)		(0.4)	(0.2)
End of year balance	7.2	8.1	7.6
Balance individually evaluated	0.2	1.0	0.1
Receivables:
End of year balance	6,562.5	7,185.5	7,919.1
Balance individually evaluated	0.8	10.9	1.2
Other
Allowance:
Beginning of year balance	8.7	8.8	14.6
Provision (credit) for credit losses	2.6	1.6	(5.4)
Write-offs	(3.0)	(1.6)	(0.7)
Recoveries	0.5	0.2	0.3
Other changes (primarily translation adjustments)	(0.3)	(0.3)
End of year balance	8.5	8.7	8.8
Balance individually evaluated	0.1	0.2
Receivables:
End of year balance	605.3	567.1	$ 589.6
Balance individually evaluated	$ 0.6	$ 0.8