Industry Segment Operations - Net Sales and Operating Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 26, 2020	Jul. 28, 2019	Jul. 26, 2020	Jul. 28, 2019
Net sales and operating income (loss) for each reportable segment
Net Sales	$ 4,395	$ 3,562	$ 12,514	$ 10,854
Operating Income (Loss)	$ 1,108	$ 802	$ 3,082	$ 2,486
Sales Revenue
Net sales and operating income (loss) for each reportable segment
Percentage of net sales	100.00%	100.00%	100.00%	100.00%
Corporate and Other
Net sales and operating income (loss) for each reportable segment
Net Sales	$ 20	$ 19	$ 46	$ 58
Operating Income (Loss)	$ (206)	$ (111)	$ (576)	$ (362)
Semiconductor Systems | Sales Revenue
Net sales and operating income (loss) for each reportable segment
Percentage of net sales	100.00%	100.00%	100.00%	100.00%
Semiconductor Systems | Foundry, logic and other | Sales Revenue
Net sales and operating income (loss) for each reportable segment
Percentage of net sales	55.00%	49.00%	60.00%	50.00%
Semiconductor Systems | Dynamic random-access memory (DRAM) | Sales Revenue
Net sales and operating income (loss) for each reportable segment
Percentage of net sales	22.00%	27.00%	19.00%	22.00%
Semiconductor Systems | Flash memory | Sales Revenue
Net sales and operating income (loss) for each reportable segment
Percentage of net sales	23.00%	24.00%	21.00%	28.00%
Semiconductor Systems | Operating Segments
Net sales and operating income (loss) for each reportable segment
Net Sales	$ 2,916	$ 2,273	$ 8,297	$ 6,725
Operating Income (Loss)	958	613	2,655	1,823
Applied Global Services | Operating Segments
Net sales and operating income (loss) for each reportable segment
Net Sales	1,034	931	3,049	2,877
Operating Income (Loss)	273	259	807	827
Display and Adjacent Markets | Operating Segments
Net sales and operating income (loss) for each reportable segment
Net Sales	425	339	1,122	1,194
Operating Income (Loss)	$ 83	$ 41	$ 196	$ 198