Leases - Narrative (Details) $ in Millions	12 Months Ended
	Oct. 25, 2020 renewal_option	Oct. 27, 2019 USD ($)	Oct. 28, 2018 USD ($)
Leases [Abstract]
Finance lease, number of renewal or termination options	1
Operating lease, number of renewal or termination options	1
Operating lease, number of leases with residual value included in minimum lease payments	1
Rent expense | $		$ 23.1	$ 22.9