Allowance for Doubtful Accounts - Schedule of Allowance for Retail, Wholesale, Trade & Other (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2019	Jan. 31, 2018
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful accounts at beginning of period	$ 50	$ 48
Provision for doubtful accounts, net of recoveries	1	1
Charge-off of accounts	(1)	(1)
Allowance for Doubtful Accounts Receivable, Recoveries		1
Financing Receivable, Allowance for Credit Losses, Other	1	1
Allowance for doubtful accounts at end of period	51	50
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for Doubtful Accounts Receivable, Recoveries	0
Retail Portfolio [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful accounts at beginning of period	19	17
Provision for doubtful accounts, net of recoveries	1	0
Charge-off of accounts	(1)	(1)
Allowance for Doubtful Accounts Receivable, Recoveries		1
Financing Receivable, Allowance for Credit Losses, Other	1	1
Allowance for doubtful accounts at end of period	20	18
Impaired Financing Receivable, Average Recorded Investment	21	18
Wholesale Portfolio [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful accounts at beginning of period	3	3
Provision for doubtful accounts, net of recoveries	0	0
Charge-off of accounts	0	0
Allowance for Doubtful Accounts Receivable, Recoveries		0
Financing Receivable, Allowance for Credit Losses, Other	0	0
Allowance for doubtful accounts at end of period	3	3
Trade and Other Receivables [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful accounts at beginning of period	28	28
Provision for doubtful accounts, net of recoveries	0	1
Charge-off of accounts	0	0
Allowance for Doubtful Accounts Receivable, Recoveries		0
Financing Receivable, Allowance for Credit Losses, Other	0	0
Allowance for doubtful accounts at end of period	28	$ 29
Trade and Other Receivables [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for Doubtful Accounts Receivable, Recoveries	0
Wholesale Portfolio [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for Doubtful Accounts Receivable, Recoveries	0
Retail Portfolio [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for Doubtful Accounts Receivable, Recoveries	$ 0