Goodwill, Purchased Technology and Other Intangible Assets - Schedule of Goodwill and Other Indefinite-lived Intangible Assets (Details) - USD ($) $ in Millions	Jan. 31, 2021	Oct. 25, 2020
Goodwill [Line Items]
Goodwill	$ 3,479	$ 3,466
Corporate and Other
Goodwill [Line Items]
Goodwill	41	41
Semiconductor Systems
Goodwill [Line Items]
Goodwill	2,207	2,208
Applied Global Services
Goodwill [Line Items]
Goodwill	1,032	1,018
Display and Adjacent Markets
Goodwill [Line Items]
Goodwill	$ 199	$ 199