Balance Sheet Detail (Property, Plant and Equipment) (Details) - USD ($) $ in Millions	6 Months Ended
	Apr. 30, 2017	Oct. 30, 2016
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 3,172	$ 3,043
Accumulated depreciation	(2,203)	(2,106)
Net property, plant and equipment	969	937
Land and improvements
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	159	159
Buildings and improvements
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 1,278	1,261
Buildings and improvements | Min
Property, Plant and Equipment [Line Items]
Useful life	3 years
Buildings and improvements | Max
Property, Plant and Equipment [Line Items]
Useful life	30 years
Demonstration and manufacturing equipment
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 1,069	992
Demonstration and manufacturing equipment | Min
Property, Plant and Equipment [Line Items]
Useful life	3 years
Demonstration and manufacturing equipment | Max
Property, Plant and Equipment [Line Items]
Useful life	5 years
Furniture, fixtures and other equipment
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 570	547
Furniture, fixtures and other equipment | Min
Property, Plant and Equipment [Line Items]
Useful life	3 years
Furniture, fixtures and other equipment | Max
Property, Plant and Equipment [Line Items]
Useful life	15 years
Construction in progress
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 96	$ 84