| **Fair Value Measurements (Tables)**                               | 6 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
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| **Fair Value Disclosures [Abstract]**                              |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
| Financial instruments measured at fair value, recurring basis      | The following table presents the financial instruments measured at fair value on a recurring basis:  April 30, 2015 October 31, 2014(in millions)Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 TotalAssets               Marketable securities:               U.S. Treasury bills$170 $— $— $170 $256 $— $— $256Other103 — — 103 349 — — 349Derivative financial instruments:               Interest rate caps(A)— 1 — 1 — 1 — 1Total assets$273 $1 $— $274 $605 $1 $— $606Liabilities               Derivative financial instruments:               Commodity forward contracts(B)$— $5 $— $5 $— $2 $— $2Foreign currency contracts(C)— 1 — 1 — — — —Guarantees— — 7 7 — — 8 8Total liabilities$— $6 $7 $13 $— $2 $8 $10                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| Financial instruments classified within Level 3                    | The following table presents the changes for those financial instruments classified within Level 3 of the valuation hierarchy:Three Months Ended April 30,(in millions)20152014Guarantees, at February 1$(8)$(6)Transfers out of Level 3——Issuances——Settlements1—Guarantees, at April 30$(7)$(6)Change in unrealized gains on assets and liabilities still held$—$— Six Months Ended April 30,(in millions)2015 2014Guarantees, at November 1$(8) $(6)Transfers out of Level 3— —Issuances— —Settlements1 —Guarantees, at April 30$(7) $(6)Change in unrealized gains on assets and liabilities still held$— $—                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| Financial instruments measured at fair value, nonrecurring basis   | The following table presents the financial instruments measured at fair value on a nonrecurring basis:(in millions)April 30, 2015 October 31, 2014Level 2 financial instruments   Carrying value of impaired finance receivables (A)$20 $20Specific loss reserve(9) (6)Fair value$11 $14_________________________(A)Certain impaired finance receivables are measured at fair value on a nonrecurring basis. An impairment charge is recorded for the amount by which the carrying value of the receivables exceeds the fair value of the underlying collateral, net of remarketing costs. Fair values of the underlying collateral are determined by reference to dealer vehicle value publications adjusted for certain market factors.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| Carrying values and estimated fair values of financial instruments | The following tables present the carrying values and estimated fair values of financial instruments: As of April 30, 2015 Estimated Fair Value Carrying Value(in millions)Level 1 Level 2 Level 3 Total Assets         Retail notes$— $— $209 $209 $208Notes receivable— — 5 5 5Liabilities         Debt:         Manufacturing operations         Senior Secured Term Loan Credit Facility, as Amended, due 2017— — 719 719 6948.25% Senior Notes, due 20211,233 — — 1,233 1,1814.50% Senior Subordinated Convertible Notes, due 2018(A)— — 185 185 1834.75% Senior Subordinated Convertible Notes, due 2019(A)— — 383 383 375Debt of majority-owned dealerships— — 28 28 28Financing arrangements— — 21 21 45Loan Agreement related to 6.50% Tax Exempt Bonds, due 2040— 243 — 243 225Promissory Note— — 5 5 5Financed lease obligations— — 141 141 141Other— — 24 24 24Financial Services operations         Asset-backed debt issued by consolidated SPEs, at various rates, due serially through 2018— — 984 984 986Bank revolvers, at fixed and variable rates, due dates from 2015 through 2020— — 1,184 1,184 1,205Commercial paper, at variable rates, program matures in 201777 — — 77 77Borrowings secured by operating and finance leases, at various rates, due serially through 2018— — 29 29 29 As of October 31, 2014 Estimated Fair Value Carrying Value(in millions)Level 1 Level 2 Level 3 Total Assets         Retail notes$— $— $279 $279 $275Notes receivable— — 7 7 8Liabilities         Debt:         Manufacturing operations         Senior Secured Term Loan Credit Facility, as Amended, due 2017— — 704 704 6948.25% Senior Notes, due 20211,285 — — 1,285 1,1804.50% Senior Subordinated Convertible Notes, due 2018(A)— — 196 196 1814.75% Senior Subordinated Convertible Notes, due 2019(A)— — 413 413 371Debt of majority-owned dealerships— — 30 30 30Financing arrangements— — 22 22 48Loan Agreement related to 6.50% Tax Exempt Bonds, due 2040— 232 — 232 225Promissory Note— — 10 10 10Financed lease obligations— — 184 184 184Other— — 28 28 29Financial Services operations         Asset-backed debt issued by consolidated SPEs, at various rates, due serially through 2019— — 911 911 914Bank revolvers, at fixed and variable rates, due dates from 2014 through 2020— — 1,214 1,214 1,242Commercial paper, at variable rates, program matures in 201574 — — 74 74Borrowings secured by operating and finance leases, at various rates, due serially through 2018— — 36 36 36_________________________(A)The carrying value represents the consolidated financial statement amount of the debt which excludes the allocation of the conversion feature to equity, while the fair value is based on internally developed valuation techniques such as discounted cash flow modeling for Level 3 convertible notes which include the equity feature. |

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| - Definition
Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3).
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| - Definition
Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset.
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| - Definition
Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities.
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| - Definition
Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).
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