Discontinued Operations - Non-cash Items and Capital Expenditures of Discontinued Operations (Details) - Hewlett-Packard Enterprise - Spinoff - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Jul. 31, 2015	Jul. 31, 2015
Major components of assets and liabilities included in distribution
Depreciation and amortization	$ 925	$ 2,750
Purchases of property, plant and equipment	$ 768	$ 2,215

Amount of capital expenditure attributable to discontinued operations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=51717284&loc=SL51721673-107760

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Amount of deprecation and amortization expense attributable to property, plant and equipment and intangible assets of discontinued operations.

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