Leases - Lease Expense and Supplemental Information (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2021	Jan. 26, 2020
Leases [Abstract]
Operating lease cost	$ 19	$ 13
Weighted-average remaining lease term (in years)	5 years	5 years 6 months
Weighted-average discount rate	1.80%	1.80%
Operating cash flows paid for operating leases	$ 19	$ 13
Right-of-use assets obtained in exchange for operating lease liabilities	$ 4	$ 5