Property and Equipment, Net Schedule of Future Minimum Lease Payments (Details) $ in Millions	Oct. 31, 2018 USD ($)
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Capital Leases, Future Minimum Payments Due, Next Twelve Months	$ 5
Capital Leases, Future Minimum Payments Due in Two Years	4
Capital Leases, Future Minimum Payments Due in Three Years	4
Capital Leases, Future Minimum Payments Due in Four Years	1
Capital Leases, Future Minimum Payments Due in Five Years	1
Capital Leases, Future Minimum Payments Due Thereafter	0
Capital Leases, Future Minimum Payments Due	15
Capital Leases, Future Minimum Payments, Interest Included in Payments	2
Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments	13
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	32
Operating Leases, Future Minimum Payments, Due in Two Years	28
Operating Leases, Future Minimum Payments, Due in Three Years	23
Operating Leases, Future Minimum Payments, Due in Four Years	18
Operating Leases, Future Minimum Payments, Due in Five Years	14
Operating Leases, Future Minimum Payments, Due Thereafter	18
Operating Leases, Future Minimum Payments Due	133
Future Minimum Lease Payments Due Current	37
Future Minimum Lease Payments Due in Two Years	32
Future Minimum Lease Payments Due in Three Years	27
Future Minimum Lease Payments Due in Four Years	19
Future Minimum Lease Payments Due in Five Years	15
Future Minimum Lease Payments Due Thereafter	18
Future Minimum Lease Payments Due	$ 148