| **Debt - Financial Services Operations (Details) (USD $)In Millions, unless otherwise specified**    | Apr. 30, 2013 | Oct. 31, 2012 |
|------------------------------------------------------------------------------------------------------|---------------|---------------|
| **Debt Instrument [Line Items]**                                                                     |          |          |
| Debt, Current                                                                                        | $ 779         | $ 1,205       |
| Long-term Debt and Capital Lease Obligations                                                         | 4,002         | 3,566         |
| Financial Services Operations [Member] | Secured Debt [Member]                                       |          |          |
| **Debt Instrument [Line Items]**                                                                     |          |          |
| Long-term Debt                                                                                       | 805           | 994           |
| Financial Services Operations [Member] | Line of Credit [Member]                                     |          |          |
| **Debt Instrument [Line Items]**                                                                     |          |          |
| Long-term Debt                                                                                       | 861           | 763           |
| Financial Services Operations [Member] | Commercial Paper [Member]                                   |          |          |
| **Debt Instrument [Line Items]**                                                                     |          |          |
| Long-term Debt                                                                                       | 0             | 31            |
| Financial Services Operations [Member] | Borrowings Secured By Operating and Finance Leases [Member] |          |          |
| **Debt Instrument [Line Items]**                                                                     |          |          |
| Long-term Debt                                                                                       | 65            | 78            |
| Financial Services Operations [Member] | Debt [Member]                                               |          |          |
| **Debt Instrument [Line Items]**                                                                     |          |          |
| Long-term Debt                                                                                       | 1,731         | 1,866         |
| Debt, Current                                                                                        | 657           | 1,033         |
| Long-term Debt and Capital Lease Obligations                                                         | $ 1,074       | $ 833         |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Carrying value as of the balance sheet date of the sum of short-term debt and current maturities of long-term debt and capital lease obligations, which are due within one year (or one business cycle if longer).
+ References
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Sum of the carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year or the normal operating cycle, if longer plus capital lease obligations due to be paid more than one year after the balance sheet date.
+ References
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