Overview and Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions	12 Months Ended
Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2013	Oct. 21, 2015
Overview and Summary of Significant Accounting Policies
Number of shares of Hewlett Packard Enterprise common stock for every share of HP Inc. common stock				1
Advertising cost	$ 859	$ 834	$ 867

Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 720
-SubTopic 35
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848

Name:	us-gaap_AdvertisingExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration