Property and Equipment, Net Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Property, Plant and Equipment [Line Items]
Commitments For Capital Expenditures In Progress	$ 37	$ 36	$ 27
Capital Expenditures Incurred but Not yet Paid	46	50	48
Operating Leases, Rent Expense	23	40	49
Operating Leases, Income Statement, Sublease Revenue	$ 3	$ 5	$ 11
Minimum [Member]
Property, Plant and Equipment [Line Items]
Lessee, Operating Lease, Term of Contract	1 year
Maximum [Member]
Property, Plant and Equipment [Line Items]
Lessee, Operating Lease, Term of Contract	20 years