Balance Sheet Detail (Property, Plant and Equipment) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 30, 2016	Oct. 25, 2015	Oct. 26, 2014
Property, Plant and Equipment, Net
Gross property, plant and equipment	$ 3,043	$ 2,946
Accumulated depreciation	(2,106)	(2,054)
Net property, plant and equipment	937	892
Depreciation	200	185	$ 191
Land and improvements
Property, Plant and Equipment, Net
Gross property, plant and equipment	159	157
Building and improvements
Property, Plant and Equipment, Net
Gross property, plant and equipment	$ 1,261	1,247
Building and improvements | Minimum
Property, Plant and Equipment, Net
Useful life	3 years
Building and improvements | Maximum
Property, Plant and Equipment, Net
Useful life	30 years
Demonstration and manufacturing equipment
Property, Plant and Equipment, Net
Gross property, plant and equipment	$ 992	920
Demonstration and manufacturing equipment | Minimum
Property, Plant and Equipment, Net
Useful life	3 years
Demonstration and manufacturing equipment | Maximum
Property, Plant and Equipment, Net
Useful life	5 years
Furniture, fixtures and other equipment
Property, Plant and Equipment, Net
Gross property, plant and equipment	$ 547	574
Furniture, fixtures and other equipment | Minimum
Property, Plant and Equipment, Net
Useful life	3 years
Furniture, fixtures and other equipment | Maximum
Property, Plant and Equipment, Net
Useful life	15 years
Construction in progress
Property, Plant and Equipment, Net
Gross property, plant and equipment	$ 84	$ 48