Industry Segment Operations - Net Sales and Operating Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2021	Jan. 26, 2020
Net sales and operating income (loss) for each reportable segment
Net Sales	$ 5,162	$ 4,162
Operating Income (Loss)	$ 1,283	$ 1,042
Sales Revenue
Net sales and operating income (loss) for each reportable segment
Percentage of net sales	100.00%	100.00%
Corporate and Other
Net sales and operating income (loss) for each reportable segment
Net Sales	$ 43	$ 19
Operating Income (Loss)	$ (375)	$ (189)
Semiconductor Systems | Sales Revenue
Net sales and operating income (loss) for each reportable segment
Percentage of net sales	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	58.00%	68.00%
Semiconductor Systems | Dynamic random-access memory (DRAM) | Sales Revenue
Net sales and operating income (loss) for each reportable segment
Percentage of net sales	17.00%	15.00%
Semiconductor Systems | Flash memory | Sales Revenue
Net sales and operating income (loss) for each reportable segment
Percentage of net sales	25.00%	17.00%
Semiconductor Systems | Operating Segments
Net sales and operating income (loss) for each reportable segment
Net Sales	$ 3,553	$ 2,814
Operating Income (Loss)	1,261	915
Applied Global Services | Operating Segments
Net sales and operating income (loss) for each reportable segment
Net Sales	1,155	997
Operating Income (Loss)	332	278
Display and Adjacent Markets | Operating Segments
Net sales and operating income (loss) for each reportable segment
Net Sales	411	332
Operating Income (Loss)	$ 65	$ 38