Industry Segment Operations (Net Sales and Operating Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 27, 2019	Jan. 28, 2018
Net sales and operating income (loss) for each reportable segment
Net Sales	$ 3,753	$ 4,205
Operating Income (Loss)	908	1,215
Corporate and Other
Net sales and operating income (loss) for each reportable segment
Net Sales	16	29
Operating Income (Loss)	(123)	(154)
Semiconductor Systems | Operating Segments
Net sales and operating income (loss) for each reportable segment
Net Sales	2,268	2,852
Operating Income (Loss)	631	1,024
Applied Global Services | Operating Segments
Net sales and operating income (loss) for each reportable segment
Net Sales	962	881
Operating Income (Loss)	285	255
Display and Adjacent Markets | Operating Segments
Net sales and operating income (loss) for each reportable segment
Net Sales	507	443
Operating Income (Loss)	$ 115	$ 90
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	44.00%	37.00%
Dynamic random-access memory (DRAM) | Sales Revenue | Semiconductor Systems
Net sales and operating income (loss) for each reportable segment
Percentage of net sales	21.00%	26.00%
Flash memory | Sales Revenue | Semiconductor Systems
Net sales and operating income (loss) for each reportable segment
Percentage of net sales	35.00%	37.00%