Industry Segment Operations (Net Sales and Operating Income (Loss)) (Details) - Semiconductor Systems - Net sales	12 Months Ended
Oct. 27, 2019	Oct. 28, 2018	Oct. 29, 2017
Segment Reporting Information [Line Items]
Percentage of net sales	100.00%	100.00%	100.00%
Foundry, logic and other
Segment Reporting Information [Line Items]
Percentage of net sales	52.00%	36.00%	51.00%
Dynamic random-access memory (DRAM)
Segment Reporting Information [Line Items]
Percentage of net sales	22.00%	27.00%	15.00%
Flash memory
Segment Reporting Information [Line Items]
Percentage of net sales	26.00%	37.00%	34.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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