Balance Sheet Details (Details) (USD $)	3 Months Ended		9 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013	Apr. 30, 2014	Oct. 31, 2013
Accounts Receivable, Net
Accounts receivable	$ 14,451,000,000		$ 14,451,000,000			$ 16,208,000,000
Allowance for doubtful accounts	(253,000,000)		(253,000,000)
Accounts receivable, net	14,198,000,000		14,198,000,000			15,876,000,000
Allowance for doubtful accounts - accounts receivable:
Balance at beginning of period			332,000,000
Provision for doubtful accounts			14,000,000
Deductions, net of recoveries			(93,000,000)
Balance at end of period	253,000,000		253,000,000
Additional maximum arrangement capacity					1,600,000,000
Trade receivables sold and cash received
Trade receivables sold	2,903,000,000	1,130,000,000	6,853,000,000	3,784,000,000
Cash receipts	2,922,000,000	995,000,000	6,575,000,000	3,510,000,000
Non-recourse arrangements
Maximum program capacity	1,122,000,000		1,122,000,000			764,000,000
Utilized capacity	(692,000,000)		(692,000,000)			(314,000,000)
Available capacity	430,000,000		430,000,000			450,000,000
Partial-recourse arrangement
Maximum program capacity	1,964,000,000		1,964,000,000			631,000,000
Utilized capacity	(1,408,000,000)		(1,408,000,000)			(454,000,000)
Available capacity	556,000,000		556,000,000			177,000,000
Total arrangements
Maximum program capacity	3,086,000,000		3,086,000,000			1,395,000,000
Utilized capacity	(2,100,000,000)		(2,100,000,000)			(768,000,000)
Available capacity	986,000,000		986,000,000			627,000,000
Amounts due from third parties for transferred trade receivables
Non recourse arrangements	62,000,000		62,000,000			52,000,000
Partial recourse arrangements	387,000,000		387,000,000			119,000,000
Total arrangements	449,000,000		449,000,000			171,000,000
Inventory
Finished goods	3,991,000,000		3,991,000,000			3,847,000,000
Purchased parts and fabricated assemblies	2,258,000,000		2,258,000,000			2,199,000,000
Inventory, net	6,249,000,000		6,249,000,000			6,046,000,000
Other Liabilities
Pension, post-retirement, and post-employment liabilities	4,653,000,000		4,653,000,000			5,098,000,000
Long-term deferred revenue	3,865,000,000		3,865,000,000			3,907,000,000
Deferred tax liability - long-term	1,228,000,000		1,228,000,000			2,668,000,000
Other long-term liabilities	4,918,000,000		4,918,000,000			4,218,000,000
Other Liabilities, total	$ 14,664,000,000		$ 14,664,000,000			$ 15,891,000,000