Balance Sheet Detail - Property, Plant and Equipment (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2021	Oct. 25, 2020
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 4,495	$ 4,380
Accumulated depreciation	(2,857)	(2,776)
Property, Plant and Equipment, Net	1,638	1,604
Land and improvements
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	271	256
Buildings and improvements
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 1,662	1,655
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	$ 1,660	1,586
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	$ 670	646
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	$ 232	$ 237