| **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 an original maturity greater than 90 days. 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 10, 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 11, Commitments and Contingencies.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 $10_________________________(A)The asset value of interest rate caps are included in other noncurrent assets as of April 30, 2015 and October 31, 2014 in the accompanying Consolidated Balance Sheets.(B)The liability value of commodity forward contracts are included in other noncurrent liabilities as of April 30, 2015 and October 31, 2014 in the accompanying Consolidated Balance Sheets.(C)The liability value of foreign currency contracts are included in other noncurrent liabilities as of April 30, 2015 in the accompanying Consolidated Balance Sheets.The following table presents the changes for those financial instruments classified within Level 3 of the valuation hierarchy:Three Months Ended April 30,(in millions)20152014Guarantees, at February 1$(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) $(6)Change in unrealized gains on assets and liabilities still held$— $—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.In the second quarter of 2014, for the purpose of impairment evaluation the Company measured the implied fair value of the Company's Brazilian engine reporting unit's goodwill and the fair value of an indefinite-lived intangible asset, trademark. The Company's Brazilian engine reporting unit's goodwill was determined to be fully impaired and resulted in a non-cash charge of $142 million. In addition, the related trademark, with a carrying value of $43 million was determined to be impaired and a non-cash charge of $7 million was recognized. The impairment charges were included in Asset impairment charges in the Company's Consolidated Statements of Operations. We utilized the income approach to determine the fair value of these Level 3 assets. For more information, see Note 1, Summary of Significant Accounting Policies.In the first quarter of 2014, the Company concluded it had a triggering event related to potential sales of assets requiring assessment of impairment for certain intangible and long-lived assets in the Truck segment. As a result, certain amortizing intangible assets and long-lived assets with a carrying value of $18 million were determined to be fully impaired, resulting in an impairment charge of $18 million, which was included in Asset impairment charges in the Company's Consolidated Statements of Operations. We utilized the market approach to determine the fair values of these Level 2 assets.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. The 6.5% Tax Exempt Bonds, due 2040, are traded, but the trading market is illiquid, and as a result, the Loan Agreement underlying the Tax Exempt Bonds 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: 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
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.
+ References
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