Property and Equipment, Net Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Property, Plant and Equipment [Line Items]
Commitments For Capital Expenditures In Progress	$ 212	$ 37	$ 36
Capital Expenditures Incurred but Not yet Paid	$ 76	$ 46	$ 50