Industry Segment Operations - Net Sales and Operating Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 26, 2020	Apr. 28, 2019	Apr. 26, 2020	Apr. 28, 2019
Net sales and operating income (loss) for each reportable segment
Net Sales	$ 3,957	$ 3,539	$ 8,119	$ 7,292
Operating Income (Loss)	$ 932	$ 776	$ 1,974	$ 1,684
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	$ 7	$ 23	$ 26	$ 39
Operating Income (Loss)	$ (181)	$ (128)	$ (370)	$ (251)
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	56.00%	58.00%	62.00%	51.00%
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%	18.00%	18.00%	19.00%
Semiconductor Systems | Flash memory | Sales Revenue
Net sales and operating income (loss) for each reportable segment
Percentage of net sales	22.00%	24.00%	20.00%	30.00%
Semiconductor Systems | Operating Segments
Net sales and operating income (loss) for each reportable segment
Net Sales	$ 2,567	$ 2,184	$ 5,381	$ 4,452
Operating Income (Loss)	782	579	1,697	1,210
Applied Global Services | Operating Segments
Net sales and operating income (loss) for each reportable segment
Net Sales	1,018	984	2,015	1,946
Operating Income (Loss)	256	283	534	568
Display and Adjacent Markets | Operating Segments
Net sales and operating income (loss) for each reportable segment
Net Sales	365	348	697	855
Operating Income (Loss)	$ 75	$ 42	$ 113	$ 157