Property and Equipment, Net Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Property, Plant and Equipment [Line Items]
Commitments For Capital Expenditures In Progress	$ 36	$ 27	$ 24
Capital Expenditures Incurred but Not yet Paid	50	48	21
Operating Leases, Rent Expense	40	49	53
Operating Leases, Income Statement, Sublease Revenue	$ 5	$ 11	$ 12
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