Property and Equipment, Net Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Property, Plant and Equipment [Line Items]
Commitments For Capital Expenditures In Progress	$ 27	$ 24	$ 17
Capital Expenditures Incurred but Not yet Paid	48	21	26
Operating Leases, Rent Expense	49	53	57
Operating Leases, Income Statement, Sublease Revenue	$ 11	$ 12	$ 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