Property and Equipment, Net Schedule of Future Minimum Lease Payments (Details) $ in Millions	Oct. 31, 2019 USD ($)
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Capital Leases, Future Minimum Payments Due, Next Twelve Months	$ 1
Capital Leases, Future Minimum Payments Due in Two Years	1
Capital Leases, Future Minimum Payments Due in Three Years	0
Capital Leases, Future Minimum Payments Due in Four Years	0
Capital Leases, Future Minimum Payments Due in Five Years	0
Capital Leases, Future Minimum Payments Due Thereafter	0
Capital Leases, Future Minimum Payments Due	2
Capital Leases, Future Minimum Payments, Interest Included in Payments	0
Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments	2
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	37
Operating Leases, Future Minimum Payments, Due in Two Years	28
Operating Leases, Future Minimum Payments, Due in Three Years	22
Operating Leases, Future Minimum Payments, Due in Four Years	18
Operating Leases, Future Minimum Payments, Due in Five Years	13
Operating Leases, Future Minimum Payments, Due Thereafter	31
Operating Leases, Future Minimum Payments Due	149
Future Minimum Lease Payments Due Current	38
Future Minimum Lease Payments Due in Two Years	29
Future Minimum Lease Payments Due in Three Years	22
Future Minimum Lease Payments Due in Four Years	18
Future Minimum Lease Payments Due in Five Years	13
Future Minimum Lease Payments Due Thereafter	31
Future Minimum Lease Payments Due	$ 151