Revenue - Product Revenue, Service Revenue and Warrant Revenue Narrative (Details)	3 Months Ended
	Feb. 01, 2019
Minimum | Product Revenue
Disaggregation of Revenue [Line Items]
Contract with customer, contract period	30 days
Minimum | Service Revenue
Disaggregation of Revenue [Line Items]
Contract with customer, contract period	12 months
Minimum | Warranty Revenue
Disaggregation of Revenue [Line Items]
Contract with customer, contract period	12 months
Maximum | Product Revenue
Disaggregation of Revenue [Line Items]
Contract with customer, contract period	120 days
Maximum | Service Revenue
Disaggregation of Revenue [Line Items]
Contract with customer, contract period	36 months
Maximum | Warranty Revenue
Disaggregation of Revenue [Line Items]
Contract with customer, contract period	24 months