| **Consolidated Statements of Financial Position (USD $)In Millions, unless otherwise specified**            | Jun. 30, 2012 | Dec. 31, 2011 |
|-------------------------------------------------------------------------------------------------------------|---------------|---------------|
| **Assets:**                                                                                                 |          |          |
| Cash and cash equivalents                                                                                   | $ 2,210       | $ 1,176       |
| **Finance receivables**                                                                                     |          |          |
| Retail notes receivable                                                                                     | 10,183        | 8,840         |
| Wholesale notes receivable                                                                                  | 4,156         | 4,368         |
| Finance leases and installment sale contracts - Retail                                                      | 12,867        | 12,436        |
| Finance leases and installment sale contracts - Wholesale                                                   | 461           | 425           |
| Total gross finance receivables                                                                             | 27,667        | 26,069        |
| Less: Unearned income                                                                                       | (951)         | (944)         |
| Less: Allowance for credit losses                                                                           | (393)         | (369)         |
| Total net finance receivables                                                                               | 26,323        | 24,756        |
| Notes receivable from Caterpillar                                                                           | 310           | 327           |
| Equipment on operating leases, less accumulated depreciation                                                | 2,749         | 2,611         |
| Deferred and refundable income taxes                                                                        | 123           | 159           |
| Other assets                                                                                                | 1,040         | 1,083         |
| Total assets                                                                                                | 32,755        | 30,112        |
| **Liabilities and stockholder's equity:**                                                                   |          |          |
| Payable to dealers and others                                                                               | 124           | 100           |
| Payable to Caterpillar - other                                                                              | 49            | 67            |
| Accrued expenses                                                                                            | 236           | 292           |
| Income taxes payable                                                                                        | 79            | 60            |
| Short-term borrowings                                                                                       | 4,455         | 3,895         |
| Current maturities of long-term debt                                                                        | 5,739         | 5,102         |
| Long-term debt                                                                                              | 18,092        | 16,529        |
| Deferred income taxes and other liabilities                                                                 | 593           | 597           |
| Total liabilities                                                                                           | 29,367        | 26,642        |
| Commitments and contingent liabilities (Notes 7 and 9)                                                      |     |     |
| Common stock - $1 par value Authorized: 2,000 shares; Issued and outstanding: one share (at paid-in amount) | 745           | 745           |
| Additional paid-in capital                                                                                  | 2             | 2             |
| Retained earnings                                                                                           | 2,486         | 2,512         |
| Accumulated other comprehensive income/(loss)                                                               | 55            | 116           |
| Noncontrolling interests                                                                                    | 100           | 95            |
| Total stockholder's equity                                                                                  | 3,388         | 3,470         |
| Total liabilities and stockholder's equity                                                                  | $ 32,755      | $ 30,112      |

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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Includes, as of the balance sheet date, 1) the aggregate tax effects of all future tax deductions arising from temporary differences between tax basis and GAAP basis recognition of assets, liabilities, revenues and expenses, which can only be deducted for tax purposes when permitted under enacted tax laws; after deducting any allocated valuation allowance. 2) carrying amount due from tax authorities representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes.
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| - Definition
The aggregate tax effects as of the balance sheet date of all future taxable amounts arising from temporary differences between tax basis and generally accepted accounting principles basis recognition of assets, liabilities, revenues and expenses, which will become taxable pursuant to enacted tax laws. Also, includes the aggregate carrying amount, as of the balance sheet date, of current obligations not separately disclosed in the balance sheet due to materiality considerations.
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| - Definition
Amounts due from finance leases where the lessee is considered to be the owner of the equipment during the term of the lease and installment sales contracts that enable customers to purchase equipment with a down payment or trade-in and structure payment over time.
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| - Definition
Amounts due from inventory/rental programs, which assist dealers by financing their new Caterpillar inventory and rental fleets either through finance leases where the lessee is considered to be the owner of the equipment or installment sales contracts that enables the dealer to purchase equipment with a down payment or trade-in.
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| - Definition
Represents the difference between the consideration paid and the adjustment to the carrying value of the noncontrolling interest.
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| - Definition
Includes amounts due from loans that allow customers to use their Caterpillar equipment and other assets as collateral to obtain financing and amounts due from loans that allow dealers to use their Caterpillar equipment or other collateral to obtain financing for used Caterpillar Equipment or working capital loans.
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Carrying amount of unearned finance receivable revenue, subsidy, or fees, that has not been earned as of the balance sheet date.
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Includes amounts due from inventory/rental programs, which provide assistance to dealers by financing their new Caterpillar inventory and rental fleets. Also includes short-term dealer receivables we purchase from Caterpillar at a discount.
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Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.
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Amount for accounts payable to related parties.
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| - Definition
Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities.
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| - Definition
Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.
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For an unclassified balance sheet, the valuation allowance relating to a written agreement to receive money (at a specified future date(s), consisting of principal as well as any accrued interest) for the portion that is expected to be uncollectible.
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| - Definition
Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.
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| - Definition
Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable.
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Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur.
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Aggregate of par value plus amounts in excess of par value or issuance value (in cases of no-par value stock) for common stock held by shareholders. Aggregate value for common stock issued and outstanding.
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Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future.
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| - Definition
Total of all Liabilities and Stockholders' Equity items (or Partners' Capital, as applicable), including the portion of equity attributable to noncontrolling interests, if any.
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| - Definition
Total of the portions of the carrying amounts as of the balance sheet date of long-term debt, which may include notes payable, bonds payable, debentures, mortgage loans, and commercial paper, which are scheduled to be repaid within one year or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.
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| - Definition
Sum of the carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year (current maturities) or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest).
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| - Definition
For an unclassified balance sheet, an amount representing an agreement for an unconditional promise by the maker to pay the Company (holder) a definite sum of money at a future date(s). Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. This amount does not include amounts related to receivables held-for-sale.
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| - Definition
For an unclassified balance sheet, an amount representing an agreement for an unconditional promise by the maker to pay the Entity (holder) a definite sum of money at a future date, net of any write-downs taken for collection uncertainty on the part of the holder. Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. This amount does not include amounts related to receivables held-for-sale.
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| - Definition
For an unclassified balance sheet, amounts due from parties associated with the reporting entity as evidenced by a written promise to pay.
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| - Definition
The aggregate carrying amounts, as of the balance sheet date, of assets not separately disclosed in the balance sheet.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of property, by major property class, net of accumulated depreciation, subject to or available for lease as of the balance sheet date.
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cumulative amount of the reporting entity's undistributed earnings or deficit.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Total of Stockholders' Equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity including portions attributable to both the parent and noncontrolling interests (previously referred to as minority interest), if any. The entity including portions attributable to the parent and noncontrolling interests is sometimes referred to as the economic entity. This excludes temporary equity and is sometimes called permanent equity.
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| - Definition
Carrying value as of the balance sheet date of obligations incurred and payable for statutory income, sales, use, payroll, excise, real, property and other taxes.
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