| **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                 |

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| - Definition
Amount of minimum lease payments for capital leases.
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Amount of minimum lease payments for capital leases due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.
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Amount of minimum lease payments for capital leases due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.
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Amount of minimum lease payments for capital leases due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.
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| - Definition
Amount of minimum lease payments for capital leases due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.
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Amount of minimum lease payments for capital leases due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.
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| - Definition
Amount of minimum lease payments for capital leases due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.
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| - Definition
Amount necessary to reduce net minimum lease payments to present value for capital leases.
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| - Definition
Present value of minimum lease payments for capital leases net of executory costs, including amounts paid by the lessee to the lessor for insurance, maintenance and taxes.
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Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.
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| - Definition
Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.
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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.
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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.
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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.
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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.
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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.
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