Balance Sheet Details (Details) (USD $)	6 Months Ended
	Apr. 30, 2012	Apr. 30, 2011	Oct. 31, 2011
Accounts receivable
Accounts receivable, gross	$ 17,064,000,000		$ 18,694,000,000
Allowance for doubtful accounts	(455,000,000)		(470,000,000)
Accounts receivable, net	16,609,000,000		18,224,000,000
Maximum capacity, program for sale of trade receivables	1,400,000,000
Partial recourse facility	900,000,000
Non-recourse facility capacity	500,000,000
Trade receivables sold	2,100,000,000	897,000,000
Available capacity, program for sale of trade receivables	725,000,000		701,000,000
Inventory
Finished goods	4,518,000,000		4,869,000,000
Purchased parts and fabricated assemblies	2,788,000,000		2,621,000,000
Inventory, net	$ 7,306,000,000		$ 7,490,000,000