Contract Balances - Narrative (Details) - USD ($)	12 Months Ended
	Oct. 25, 2020	Oct. 27, 2019
Revenue from Contract with Customer [Abstract]
Revenue recognized	$ 1,100,000,000
Impairment loss on accounts receivable and contract assets	0	$ 0
Long-term Contract with Customer
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 1,100,000,000
Long-term Contract with Customer | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-10-26
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Percent of performance obligation recognized	70.00%
Performance obligation period	24 months