Goodwill and Purchased Intangible Assets (Details) (USD $) In Millions	9 Months Ended			9 Months Ended
Jul. 31, 2011	Jul. 31, 2011 Services	Jul. 31, 2011 Enterprise Servers, Storage and Networking	Jul. 31, 2011 HP Software	Jul. 31, 2011 Personal Systems Group	Jul. 31, 2011 Imaging and Printing Group	Jul. 31, 2011 HP Financial Services	Oct. 31, 2010 HP Financial Services	Jul. 31, 2011 Corporate Investments
Goodwill
Goodwill beginning balance	$ 38,483	$ 16,967	$ 6,610	$ 7,545	$ 2,500	$ 2,456	$ 144	$ 144	$ 2,261
Goodwill acquired during the period	206			190		16
Goodwill adjustments	83	267	1,504	(261)	(2)	(1)			(1,424)
Goodwill ending balance	$ 38,772	$ 17,234	$ 8,114	$ 7,474	$ 2,498	$ 2,471	$ 144	$ 144	$ 837

Carrying amount as of the balance sheet date, which is the cumulative amount paid, adjusted for any amortization recognized prior to adoption of FAS 142 and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 43

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- Definition

The aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e(1)

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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.

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- Definition

Reflects net changes to the recorded value of goodwill for foreign currency translation adjustments and purchase accounting adjustments needed to revise the carrying amount of goodwill to fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142

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