Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2016	Apr. 30, 2015	Oct. 31, 2015
Operating results of discontinued operations
(Loss) earnings from discontinued operations, net of taxes	$ (31)	$ 278	$ (89)	$ 874
Major components of assets and liabilities included in distribution
Total current assets of discontinued operations					$ 30,592
Total non-current assets of discontinued operations					46,331
Total current liabilities of discontinued operations					21,521
Spinoff | Hewlett-Packard Enterprise
Operating results of discontinued operations
Net revenue		12,476		25,457
Cost of revenue		8,930		18,328
Expenses	41	3,112	128	5,893
Interest and other, net	17	61	17	114
(Loss) earnings from discontinued operations before taxes	(58)	373	(145)	1,122
Benefit from (provision for) taxes	27	(95)	56	(248)
(Loss) earnings from discontinued operations, net of taxes	(31)	278	(89)	874
Unregocnized Tax Benefit Indemnified by Disposed Entity	$ (16)		(16)
Significant non-cash items and capital expenditures
Depreciation and amortization		904		1,825
Purchases of property, plant and equipment		$ 834		$ 1,447
Major components of assets and liabilities included in distribution
Cash and cash equivalents					9,849
Accounts receivable					8,538
Financing receivables					2,918
Inventory					2,197
Other current assets					7,090
Total current assets of discontinued operations					30,592
Property, plant and equipment					9,598
Goodwill					27,261
Long-term financing receivables and other non-current assets					9,472
Total non-current assets of discontinued operations					46,331
Notes payable and short-term borrowings					691
Accounts payable					5,762
Employee compensation and benefits					2,861
Taxes on earnings					587
Deferred revenue					5,148
Other accrued liabilities					6,472
Total current liabilities of discontinued operations					21,521
Long-term debt					15,103
Other non-current liabilities					7,346
Total non-current liabilities of discontinued operations					$ 22,449
Net cash transferred			$ 526