Industry Segment Operations - Net Sales and Operating Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 26, 2020	Jan. 27, 2019
Net sales and operating income (loss) for each reportable segment
Net Sales	$ 4,162	$ 3,753
Operating Income (Loss)	1,042	908
Corporate and Other
Net sales and operating income (loss) for each reportable segment
Net Sales	19	16
Operating Income (Loss)	(189)	(123)
Semiconductor Systems | Operating Segments
Net sales and operating income (loss) for each reportable segment
Net Sales	2,814	2,268
Operating Income (Loss)	915	631
Applied Global Services | Operating Segments
Net sales and operating income (loss) for each reportable segment
Net Sales	997	962
Operating Income (Loss)	278	285
Display and Adjacent Markets | Operating Segments
Net sales and operating income (loss) for each reportable segment
Net Sales	332	507
Operating Income (Loss)	$ 38	$ 115
Sales Revenue
Net sales and operating income (loss) for each reportable segment
Percentage of net sales	100.00%	100.00%
Sales Revenue | Semiconductor Systems
Net sales and operating income (loss) for each reportable segment
Percentage of net sales	100.00%	100.00%
Foundry, logic and other | Sales Revenue | Semiconductor Systems
Net sales and operating income (loss) for each reportable segment
Percentage of net sales	68.00%	44.00%
Dynamic random-access memory (DRAM) | Sales Revenue | Semiconductor Systems
Net sales and operating income (loss) for each reportable segment
Percentage of net sales	15.00%	21.00%
Flash memory | Sales Revenue | Semiconductor Systems
Net sales and operating income (loss) for each reportable segment
Percentage of net sales	17.00%	35.00%