| **Fair Value Measurements (Tables)**                               | 9 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:  July 31, 2014 October 31, 2013(in millions)Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 TotalAssets               Marketable securities:               U.S. Treasury bills$260 $— $— $260 $396 $— $— $396Other358 — — 358 434 — — 434Derivative financial instruments:               Foreign currency contracts— — — — — 4 — 4Interest rate caps— 1 — 1 — 1 — 1Total assets$618 $1 $— $619 $830 $5 $— $835Liabilities               Derivative financial instruments:               Foreign currency contracts$— $1 $— $1 $— $— $— $—Guarantees— — 6 6 — — 6 6Total liabilities$— $1 $6 $7 $— $— $6 $6                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| 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 July 31, 2014 2013(in millions)Guarantees Commodity contracts Guarantees Commodity contractsBalance at May 1$(6) $— $(7) $—Transfers out of Level 3— — — —Issuances— — — —Settlements— — — —Balance at July 31$(6) $— $(7) $—Change in unrealized gains on assets and liabilities still held$— $— $— $— Nine Months Ended July 31, 2014 2013(in millions)Guarantees Commodity contracts Guarantees Commodity contractsBalance at November 1$(6) $— $(7) $—Transfers out of Level 3— — — —Issuances— — — —Settlements— — — —Balance at July 31$(6) $— $(7) $—Change in unrealized gains on assets and liabilities still held$— $— $— $—                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| 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)July 31, 2014 October 31, 2013Level 2 financial instruments   Carrying value of impaired finance receivables (A)$18 $15Specific loss reserve(7) (6)Fair value$11 $9_________________________(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 July 31, 2014 Estimated Fair Value Carrying Value(in millions)Level 1 Level 2 Level 3 Total Assets         Retail notes$— $— $299 $299 $296Notes receivable— — 8 8 9Liabilities         Debt:         Manufacturing operations         Senior Secured Term Loan Credit Facility, as Amended, due 2017— — 699 699 6938.25% Senior Notes, due 20211,246 — — 1,246 1,1793.00% Senior Subordinated Convertible Notes, due 2014(A)168 — — 168 1654.50% Senior Subordinated Convertible Notes, due 2018(A)— — 206 206 1804.75% Senior Subordinated Convertible Notes, due 2019(A)— — 436 436 370Debt of majority-owned dealerships— — 34 34 34Financing arrangements— — 23 23 49Loan Agreement related to 6.50% Tax Exempt Bonds, due 2040— 236 — 236 225Promissory Note— — 13 13 13Financed lease obligations— — 195 195 195Other— — 33 33 35Financial Services operations         Asset-backed debt issued by consolidated SPEs, at various rates, due serially through 2019— — 848 848 850Bank revolvers, at fixed and variable rates, due dates from 2014 through 2020— — 1,063 1,063 1,091Commercial paper, at variable rates, program matures in 201575 — — 75 75Borrowings secured by operating and finance leases, at various rates, due serially through 2018— — 47 47 47 As of October 31, 2013 Estimated Fair Value Carrying Value(in millions)Level 1 Level 2 Level 3 Total Assets         Retail notes$— $— $390 $390 $390Notes receivable— — 13 13 14Liabilities         Debt:         Manufacturing operations         Senior Secured Term Loan Credit Facility, as Amended, due 2017— — 720 720 6938.25% Senior Notes, due 20211,274 — — 1,274 1,1783.00% Senior Subordinated Convertible Notes, due 2014(A)586 — — 586 5444.50% Senior Subordinated Convertible Notes, due 2018(A)— — 203 203 177Debt of majority-owned dealerships— — 48 48 48Financing arrangements— — 44 44 73Loan Agreement related to 6.50% Tax Exempt Bonds, due 2040— 229 — 229 225Promissory Note— — 20 20 20Financed lease obligations— — 218 218 218Other— — 36 36 39Financial Services operations         Asset-backed debt issued by consolidated SPEs, at various rates, due serially through 2019— — 775 775 778Bank revolvers, at fixed and variable rates, due dates from 2014 through 2019— — 990 990 1,018Commercial paper, at variable rates, program matures in 201521 — — 21 21Borrowings secured by operating and finance leases, at various rates, due serially through 2017— — 49 49 49_________________________(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 quoted market prices for Level 1 convertible notes which include the equity feature and 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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