Leases - Lease Expense and Supplemental Information (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 25, 2020	Oct. 27, 2019	Oct. 28, 2018
Leases [Abstract]
Operating lease cost	$ 69
Weighted-average remaining lease term (in years)	5 years 2 months 12 days
Weighted-average discount rate	1.80%
Rent expense		$ 51	$ 50
Operating cash flows paid for operating leases	$ 70
Right-of-use assets obtained in exchange for operating lease liabilities	$ 156