| **Allowance for Doubtful Accounts (Tables)**   | 9 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
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| **Allowance for Doubtful Accounts [Abstract]** | Â                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| Allowance for doubtful accounts                | The activity related to our allowance for doubtful accounts for our retail portfolio, wholesale portfolio, and trade and other receivables is summarized as follows:  Three Months Ended July 31, 2011 RetailPortfolio WholesalePortfolio Trade andOtherReceivables Total(in millions)       Allowance for doubtful accounts, at beginning of period$40 $2 $34 $76Provision for doubtful accounts, net of recoveries(1) — (2) (3)Charge-off of accounts(A)(2) — (4) (6)Allowance for doubtful accounts, at end of period$37 $2 $28 $67  Nine Months Ended July 31, 2011 RetailPortfolio WholesalePortfolio Trade andOtherReceivables Total(in millions)       Allowance for doubtful accounts, at beginning of period$58 $2 $36 $96Provision for doubtful accounts, net of recoveries(1) — (4) (5)Charge-off of accounts(A)(20) — (4) (24)Allowance for doubtful accounts, at end of period$37 $2 $28 $67 Three Months Ended July 31, 2010 Nine Months Ended July 31, 2010(in millions)   Allowance for doubtful accounts, at beginning of period$119 $104Provision for doubtful accounts, net of recoveries(1) 33Charge-off of accounts(A)(11) (30)Allowance for doubtful accounts, at end of period$107 $107_________________ (A)We repossess sold and leased vehicles on defaulted finance receivables and leases, and place them into Inventories. Losses recognized at the time of repossession and charged against the allowance for doubtful accounts were $2 million and $17 million for the three and nine months ended July 31, 2011, respectively, and $4 million and $21 million for the three and nine months ended July 31, 2010, respectively. |
| Impaired financing receivables                 | Information regarding impaired finance receivables is as follows:  As of July 31, 2011 RetailPortfolio WholesalePortfolio Total(in millions)     Impaired finance receivables with specific loss reserves$22 $— $22Impaired finance receivables without specific loss reserves— — —Specific loss reserves on impaired finance receivables13 — 13Finance receivables on non-accrual status17 — 17Average balance of impaired finance receivables for the nine months ended July 31, 201137 — 37                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| Aging analysis for gross finance receivables   | The aging analysis for finance receivables is summarized as follows:  As of July 31, 2011 RetailPortfolio WholesalePortfolio Total(in millions)     Current$1,521 $1,212 $2,73330-90 days past due83 3 86Over 90 days past due14 1 15Total finance receivables$1,618 $1,216 $2,834                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |

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| - Definition
Tabular disclosure of total receivables and activity in the allowance for credit losses account.
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| - Definition
Allowance for Doubtful Accounts [Abstract]
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| - Definition
Tabular disclosure of financing receivables by credit quality indicator. The credit quality indicator is a statistic about the credit quality of financing receivables. Examples include, but not limited to, consumer credit risk scores, credit-rating-agency ratings, an entity's internal credit risk grades, loan-to-value ratios, collateral, collection experience and other internal metrics.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 29 -URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953659-111524Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 55 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=6951925&loc=SL6953803-111525
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| - Definition
Tabular disclosure of impaired financing receivables.
+ References
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