Cash, Cash Equivalents and Investments (Gains and Losses on Investments) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Oct. 26, 2014	Oct. 27, 2013	Oct. 28, 2012
Gains and Losses on Investments
Gross realized gains	$ 27	$ 7	$ 3
Gross realized losses	$ 2	$ 2	$ 3

This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 9

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563

Name:	us-gaap_AvailableForSaleSecuritiesGrossRealizedGains
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration