Property and Equipment, Net Schedule of Future Minimum Lease Payments (Details) $ in Millions	Oct. 31, 2017 USD ($)
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Capital Leases, Future Minimum Payments Due, Next Twelve Months	$ 10
Capital Leases, Future Minimum Payments Due in Two Years	9
Capital Leases, Future Minimum Payments Due in Three Years	9
Capital Leases, Future Minimum Payments Due in Four Years	9
Capital Leases, Future Minimum Payments Due in Five Years	2
Capital Leases, Future Minimum Payments Due Thereafter	0
Capital Leases, Future Minimum Payments Due	39
Capital Leases, Future Minimum Payments, Interest Included in Payments	5
Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments	34
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	45
Operating Leases, Future Minimum Payments, Due in Two Years	39
Operating Leases, Future Minimum Payments, Due in Three Years	36
Operating Leases, Future Minimum Payments, Due in Four Years	31
Operating Leases, Future Minimum Payments, Due in Five Years	17
Operating Leases, Future Minimum Payments, Due Thereafter	27
Operating Leases, Future Minimum Payments Due	195
Future Minimum Lease Payments Due Current	55
Future Minimum Lease Payments Due in Two Years	48
Future Minimum Lease Payments Due in Three Years	45
Future Minimum Lease Payments Due in Four Years	40
Future Minimum Lease Payments Due in Five Years	19
Future Minimum Lease Payments Due Thereafter	27
Future Minimum Lease Payments Due	$ 234