Goodwill, Purchased Technology and Other Intangible Assets - Schedule of Purchased Technology and Intangible Assets (Details) - USD ($) $ in Millions	Jan. 31, 2021	Oct. 25, 2020
Summary of Purchased Technology and Intangible Assets [Line Items]
Finite lived assets	$ 140	$ 153
Purchased technology, net
Summary of Purchased Technology and Intangible Assets [Line Items]
Finite lived assets	67	75
Other Intangible Assets
Summary of Purchased Technology and Intangible Assets [Line Items]
Finite lived assets	$ 73	$ 78