Balance Sheet Details (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2017	Jan. 31, 2017	Oct. 31, 2016
Accounts Receivable, Net
Accounts receivable, billed		$ 5,411	$ 5,907
Unbilled receivable		1,140	1,086
Accounts receivable, gross		6,551	6,993
Allowance for doubtful accounts	$ (84)	(69)	(84)
Total		6,482	6,909
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at beginning of year	84
Deductions, net of recoveries	(16)
Addition from acquisition	1
Balance at end of period	69
Trade receivables sold and cash received
Balance at beginning of period	145
Trade receivables sold	838
Cash receipts	(886)
Foreign currency and other	(2)
Balance at end of period	$ 95
Inventory, Net [Abstract]
Finished goods		1,245	1,202
Purchased parts and fabricated assemblies		743	572
Inventory [Line Items]
Total		1,988	$ 1,774
SGI
Inventory [Line Items]
Total		$ 86