Balance Sheet Details (Detail) (USD $)	12 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2012	Apr. 30, 2014
Accounts Receivable, Net
Accounts receivable, gross	$ 14,064,000,000	$ 16,208,000,000
Allowance for doubtful accounts	(232,000,000)	(332,000,000)	(464,000,000)
Accounts receivable, net	13,832,000,000	15,876,000,000
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at beginning of year	332,000,000	464,000,000	470,000,000
Provision for doubtful accounts	25,000,000	23,000,000	100,000,000
Deductions, net of recoveries	(125,000,000)	(155,000,000)	(106,000,000)
Balance at end of year	232,000,000	332,000,000	464,000,000
Additional maximum program capacity				1,600,000,000
Trade receivables sold and cash received
Balance at beginning of period	172,000,000	228,000,000	245,000,000
Trade receivables sold	9,627,000,000	4,241,000,000	3,510,000,000
Cash receipts	(9,306,000,000)	(4,305,000,000)	(3,510,000,000)
Foreign currency and other	(34,000,000)	8,000,000	(17,000,000)
Balance at end of period	459,000,000	172,000,000	228,000,000
Non-recourse arrangements
Maximum program capacity	1,083,000,000	764,000,000
Utilized capacity	(613,000,000)	(314,000,000)
Available capacity	470,000,000	450,000,000
Partial-recourse arrangement
Maximum program capacity	1,877,000,000	631,000,000
Utilized capacity	(1,500,000,000)	(454,000,000)
Available capacity	377,000,000	177,000,000
Total arrangements
Maximum program capacity	2,960,000,000	1,395,000,000
Utilized capacity	(2,113,000,000)	(768,000,000)
Available capacity	847,000,000	627,000,000
Amounts due from third parties for transferred trade receivables
Non recourse arrangements	78,000,000	54,000,000
Partial recourse arrangements	381,000,000	118,000,000
Total arrangements	459,000,000	172,000,000	228,000,000
Inventory
Finished goods	3,973,000,000	3,847,000,000
Purchased parts and fabricated assemblies	2,442,000,000	2,199,000,000
Inventory, net	6,415,000,000	6,046,000,000
Other Current Assets
Deferred tax assets - short-term	2,754,000,000	3,893,000,000
Value-added taxes receivable	2,169,000,000	2,425,000,000
Supplier and other receivables	2,378,000,000	2,579,000,000
Prepaid and other current assets	4,518,000,000	4,238,000,000
Other current assets, total	11,819,000,000	13,135,000,000
Long-Term Financing Receivables and Other Assets
Financing receivables, net	3,613,000,000	3,878,000,000
Deferred tax assets-long-term	740,000,000	1,346,000,000
Deferred costs-long-term	755,000,000	999,000,000
Other	3,346,000,000	3,333,000,000
Long-Term Financing Receivables and Other Assets, total	8,454,000,000	9,556,000,000
Other Accrued Liabilities
Accrued taxes- other	2,269,000,000	2,703,000,000
Warranty	1,325,000,000	1,390,000,000
Sales and marketing programs	2,986,000,000	2,823,000,000
Other	5,499,000,000	5,590,000,000
Other Accrued Liabilities, total	12,079,000,000	12,506,000,000
Other Liabilities
Pension, post-retirement, and post-employment liabilities	6,379,000,000	5,098,000,000
Deferred revenue-long term	3,931,000,000	3,907,000,000
Deferred tax liability - long-term	1,124,000,000	2,668,000,000
Tax liability- long-term	2,861,000,000	2,213,000,000
Other long-term liabilities	2,010,000,000	2,005,000,000
Other Liabilities, total	$ 16,305,000,000	$ 15,891,000,000