Balance Sheet Detail (Property, Plant and Equipment) (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Nov. 30, 2017	Oct. 29, 2017	Oct. 30, 2016	Oct. 25, 2015
Property, Plant and Equipment, Net
Gross property, plant and equipment		$ 3,311	$ 3,043
Accumulated depreciation		(2,245)	(2,106)
Net property, plant and equipment		1,066	937
Depreciation		214	200	$ 185
Property, Plant and Equipment, Additions		345	253	$ 215
Land and improvements
Property, Plant and Equipment, Net
Gross property, plant and equipment		160	159
Building and improvements
Property, Plant and Equipment, Net
Gross property, plant and equipment		$ 1,315	1,261
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		$ 1,129	992
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		$ 572	547
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		$ 135	$ 84
Subsequent Event
Property, Plant and Equipment, Net
Property, Plant and Equipment, Additions	$ 100