Goodwill, Purchased Technology and Other Intangible Assets - Amortization Expense by Segment (Details) - USD ($) $ in Millions	3 Months Ended
Jan. 31, 2021	Jan. 26, 2020
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 13	$ 14
Semiconductor Systems \| Operating Segments
Finite-Lived Intangible Assets [Line Items]
Amortization expense	12	10
Display and Adjacent Markets \| Operating Segments
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 1	$ 4

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
-SubTopic 10
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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
-Topic 350
-SubTopic 30
-Section 45
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