Balance Sheet Details (Details) - USD ($) $ in Millions	6 Months Ended
	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2016	Oct. 31, 2015
Accounts Receivable
Accounts receivable, gross			$ 3,967	$ 4,905
Allowance for doubtful accounts	$ (80)		(83)	(80)
Accounts receivable, net			3,884	4,825
Allowance for doubtful accounts receivable
Balance at beginning of period	80
Provision for doubtful accounts	26	$ 29
Deductions, net of recoveries	(23)
Balance at end of period	83
Trade receivables sold and cash received
Balance at beginning of period	93
Trade receivables sold	3,770
Cash receipts	(3,793)
Foreign currency and other	1
Balance at end of period	$ 71
Inventory
Finished goods			2,341	2,820
Purchased parts and fabricated assemblies			1,206	1,468
Inventory, net			3,547	4,288
Other Current Assets
Value-added taxes receivable			876	942
Supplier and other receivables			1,361	1,316
Prepaid and other current assets			1,081	1,193
Deferred tax assets				1,047
Other current assets, total			3,318	4,498
Other Non Current Assets
Tax indemnifications receivable			954
Deferred tax assets			598	216
Other			1,342	1,376
Other non-current assets, total			2,894	1,592
Other Accrued Liabilities
Other accrued taxes			798	1,007
Warranty			795	871
Sales and marketing programs			2,094	2,181
Other			2,291	2,182
Other accrued liabilities, total			5,978	6,241
Other Non-Current Liabilities
Pension, post-retirement, and post-employment liabilities			2,075	2,203
Deferred tax liability			1,793	1,813
Tax liability			1,231	1,803
Deferred revenue			809	812
Tax indemnifications payable			71
Other			760	783
Other non-current liabilities, total			$ 6,739	$ 7,414