Industry Segment Operations (Segment Assets) (Details) (USD $) In Millions, unless otherwise specified	Oct. 26, 2014	Oct. 27, 2013
Segment Reporting, Asset Reconciling Item [Line Items]
Allowance for bad debts	$ (58)	$ (74)
Deferred income taxes	458us-gaap_DeferredTaxAssetsNet	478us-gaap_DeferredTaxAssetsNet
Common property, plant and equipment	861us-gaap_PropertyPlantAndEquipmentNet	850us-gaap_PropertyPlantAndEquipmentNet
Total assets	13,174us-gaap_Assets	12,043us-gaap_Assets
Operating Segments [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	8,146	7,959
Unallocated Amount to Segment [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Cash and investments	4,060	2,896
Allowance for bad debts	(58)	(74)
Deferred income taxes	299	376
Other current assets	147	203
Common property, plant and equipment	522	541
Other assets	$ 58	$ 142

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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