Goodwill, Purchased Technology and Other Intangible Assets - Amortization Expense by Segment (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Apr. 26, 2020	Apr. 28, 2019	Apr. 26, 2020	Apr. 28, 2019
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 12	$ 14	$ 26	$ 28
Semiconductor Systems \| Operating Segments
Finite-Lived Intangible Assets [Line Items]
Amortization expense	9	10	19	21
Applied Global Services \| Operating Segments
Finite-Lived Intangible Assets [Line Items]
Amortization expense	0	1	0	1
Display and Adjacent Markets \| Operating Segments
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 3	$ 3	$ 7	$ 6

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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