Balance Sheet Detail - Property, Plant and Equipment (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 26, 2020	Oct. 27, 2019
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 4,162	$ 4,071
Accumulated depreciation	(2,607)	(2,542)
Property, Plant and Equipment, Net	1,555	1,529
Land and improvements
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	256	254
Buildings and improvements
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 1,611	1,590
Buildings and improvements | Minimum
Property, Plant and Equipment [Line Items]
Useful Life	3 years
Buildings and improvements | Maximum
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	$ 1,524	1,505
Demonstration and manufacturing equipment | Minimum
Property, Plant and Equipment [Line Items]
Useful Life	3 years
Demonstration and manufacturing equipment | Maximum
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	$ 619	602
Furniture, fixtures and other equipment | Minimum
Property, Plant and Equipment [Line Items]
Useful Life	3 years
Furniture, fixtures and other equipment | Maximum
Property, Plant and Equipment [Line Items]
Useful Life	5 years
Construction in progress
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 152	$ 120