| **Fair Value Measurements**           | 6 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 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| **Fair Value Disclosures [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                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| Fair value measurements               | Fair Value MeasurementsFor assets and liabilities measured at fair value on a recurring and nonrecurring basis, a three-level hierarchy of measurements based upon observable and unobservable inputs is used to arrive at fair value. Observable inputs are developed based on market data obtained from independent sources, while unobservable inputs reflect our assumptions about valuation based on the best information available in the circumstances. Depending on the inputs, we classify each fair value measurement as follows:•Level 1—based upon quoted prices for identical instruments in active markets,•Level 2—based upon quoted prices for similar instruments, prices for identical or similar instruments in markets that are not active, or model-derived valuations, all of whose significant inputs are observable, and•Level 3—based upon one or more significant unobservable inputs.The following section describes key inputs and assumptions in our valuation methodologies:Cash Equivalents and Restricted Cash Equivalents—We classify highly liquid investments, with an original maturity of 90 days or less, including U.S. Treasury bills, federal agency securities, and commercial paper, as cash equivalents. The carrying amounts of cash and cash equivalents and restricted cash approximate fair value because of the short-term maturity and highly liquid nature of these instruments.Marketable Securities—Our marketable securities portfolios are classified as available-for-sale and primarily include investments in U.S. government securities and commercial paper with a maturity of greater than 90 days from the date of purchase. We use quoted prices from active markets to determine fair value.Derivative Assets and Liabilities—We measure the fair value of derivatives assuming that the unit of account is an individual derivative transaction and that each derivative could be sold or transferred on a stand-alone basis. We classify within Level 2 our derivatives that are traded over-the-counter and valued using internal models based on observable market inputs. In certain cases, market data is not available and we estimate inputs such as in situations where trading in a particular commodity is not active. Measurements based upon these unobservable inputs are classified within Level 3. For more information regarding derivatives, see Note 11, Financial Instruments and Commodity Contracts.Guarantees—We provide certain guarantees of payments and residual values to specific counterparties. Fair value of these guarantees is based upon internally developed models that utilize current market-based assumptions and historical data. We classify these liabilities within Level 3. For more information regarding guarantees, see Note 12, Commitments and Contingencies.The following table presents the financial instruments measured at fair value on a recurring basis:  April 30, 2013 October 31, 2012(in millions)Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 TotalAssets               Marketable securities:               U.S. Treasury bills$662 $— $— $662 $420 $— $— $420Other71 — — 71 46 — — 46Derivative financial instruments:               Foreign currency contracts— 2 — 2 — — — —Total assets$733 $2 $— $735 $466 $— $— $466Liabilities               Derivative financial instruments:               Commodity contracts$— $4 $— $4 $— $4 $— $4Foreign currency contracts— 1 — 1 — — — —Guarantees— — 7 7 — — 7 7Total liabilities$— $5 $7 $12 $— $4 $7 $11The following tables present the changes for those financial instruments classified within Level 3 of the valuation hierarchy: Three Months Ended April 30, 2013 2012(in millions)Guarantees Commodity contracts Guarantees Commodity contractsBalance at February 1$(7) $— $(7) $—Total gains (losses) (realized/unrealized) included in earnings(A)— — — —Transfers out of Level 3— — — —Issuances— — — —Settlements— — — —Balance at April 30$(7) $— $(7) $—Change in unrealized gains on assets and liabilities still held$— $— $— $— Six Months Ended April 30, 2013 2012(in millions)Guarantees Commodity contracts Guarantees Commodity contractsBalance at November 1$(7) $— $(6) $(2)Total gains (losses) (realized/unrealized) included in earnings(A)— — — (1)Transfers out of Level 3— — — 2Issuances— — (1) —Settlements— — — 1Balance at April 30$(7) $— $(7) $—Change in unrealized gains on assets and liabilities still held$— $— $— $—_________________________(A)For commodity contracts, losses are included in Cost of products sold.The following table presents these financial instruments measured at fair value on a nonrecurring basis:(in millions)April 30, 2013 October 31, 2012Level 2 financial instruments   Carrying value of impaired finance receivables (A)$12 $14Specific loss reserve7 9Fair value$5 $5_________________________(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.In addition to the methods and assumptions we use for the financial instruments recorded at fair value as discussed above, we use the following methods and assumptions to estimate the fair value for our other financial instruments that are not marked to market on a recurring basis. The carrying amounts of Cash and cash equivalents, Restricted cash, and Accounts payable approximate fair values because of the short-term maturity and highly liquid nature of these instruments. Finance receivables generally consist of retail and wholesale accounts and retail and wholesale notes. The carrying amounts of Trade and other receivables and retail and wholesale accounts approximate fair values as a result of the short-term nature of the receivables. The carrying amounts of wholesale notes approximate fair values as a result of the short-term nature of the wholesale notes and their variable interest rate terms. The fair values of these financial instruments are classified as Level 1. Due to the nature of the aforementioned financial instruments, they have been excluded from the fair value amounts presented in the table below.The fair values of our retail notes are estimated by discounting expected cash flows at estimated current market rates. The fair values of our retail notes are classified as Level 3 financial instruments.The fair values of our debt instruments classified as Level 1 were determined using quoted market prices. Our Loan Agreement underlying the Tax Exempt Bonds is traded, but is illiquid, and as a result, is classified as Level 2. The fair values of our Level 3 debt instruments are generally determined using internally developed valuation techniques such as discounted cash flow modeling. Inputs such as discount rates and credit spreads reflect our estimates of assumptions that market participants would use in pricing the instrument and may be unobservable.The following tables present the carrying values and estimated fair values of financial instruments: April 30, 2013 Estimated Fair Value Carrying Value(in millions)Level 1 Level 2 Level 3 Total Assets         Retail notes$— $— $478 $478 $478Notes receivable— — 17 17 13Liabilities         Debt:         Manufacturing operations         Senior Secured Term Loan Credit Facility, as Amended due 2017— — 687 687 6938.25% Senior Notes, due 20211,322 — — 1,322 1,1773.0% Senior Subordinated Convertible Notes, due 2014(A)585 — — 585 532Debt of majority-owned dealerships— — 43 43 43Financing arrangements— — 54 54 83Loan Agreement related to 6.5% Tax Exempt Bonds, due 2040— 245 — 245 225Promissory Note— — 25 25 25Financed lease obligations— — 209 209 209Other— — 58 58 59Financial Services operations         Asset-backed debt issued by consolidated SPEs, at various rates, due serially through 2019— — 807 807 805Bank revolvers, at fixed and variable rates, due dates from 2013 through 2019— — 832 832 861Borrowings secured by operating and finance leases, at various rates, due serially through 2017— — 65 65 65 October 31, 2012 Estimated Fair Value Carrying Value(in millions)Level 1 Level 2 Level 3 Total Assets         Retail notes$— $— $613 $613 $618Notes receivable— — 27 27 27Liabilities         Debt:         Manufacturing operations         Senior Secured Term Loan Credit Facility, as Amended due 2017— — 1,047 1,047 9918.25% Senior Notes, due 2021899 — — 899 8723.0% Senior Subordinated Convertible Notes, due 2014(A)514 — — 514 520Debt of majority-owned dealerships— — 60 60 60Financing arrangements— — 102 102 136Loan Agreement related to 6.5% Tax Exempt Bonds, due 2040— 234 — 234 225Promissory Note— — 29 29 30Other— — 67 67 67Financial Services operations         Asset-backed debt issued by consolidated SPEs, at various rates, due serially through 2019— — 994 994 994Bank revolvers, at fixed and variable rates, due dates from 2013 through 2019— — 734 734 763Commercial paper, at variable rates, matured in 201331 — — 31 31Borrowings secured by operating and finance leases, at various rates, due serially through 2017— — 79 79 78_________________________(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 the convertible note which includes the equity feature. |

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| - Definition
The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.
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