Stockholders' Equity (Details 2) $ in Millions	12 Months Ended
Oct. 31, 2015 USD ($)
Components of accumulated other comprehensive income, net of taxes
Balance	$ 26,731
Balance	27,768
Change in unrealized gains (losses) on available-for-sale securities
Components of accumulated other comprehensive income, net of taxes
Balance	81
Other comprehensive (loss) income before reclassifications	(15)
Balance	66
Separation of Hewlett Packard Enterprise	(55)
Change in net unrealized components of cash flow hedges
Components of accumulated other comprehensive income, net of taxes
Balance	108
Other comprehensive (loss) income before reclassifications	797
Reclassifications of (gains) losses into earnings	(944)
Balance	(39)
Separation of Hewlett Packard Enterprise	(68)
Change in unrealized components of defined benefit plans
Components of accumulated other comprehensive income, net of taxes
Balance	(5,376)
Other comprehensive (loss) income before reclassifications	(404)
Reclassifications of (gains) losses into earnings	425
Balance	(5,355)
Separation of Hewlett Packard Enterprise	4,230
Change in cumulative translation adjustment
Components of accumulated other comprehensive income, net of taxes
Balance	(694)
Other comprehensive (loss) income before reclassifications	(280)
Balance	(974)
Separation of Hewlett Packard Enterprise	974
Accumulated Other Comprehensive (Loss) Income
Components of accumulated other comprehensive income, net of taxes
Balance	(5,881)
Other comprehensive (loss) income before reclassifications	98
Reclassifications of (gains) losses into earnings	(519)
Balance	(6,302)
Separation of Hewlett Packard Enterprise	$ 5,081

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

No definition available.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 55
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=51821188&loc=d3e1436-108581

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Amount after tax of reclassification adjustments of other comprehensive income (loss) attributable to parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580

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- Definition

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB TOPIC 4.E)
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-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
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