| **Condensed consolidating guarantor and non-guarantor financial information (Balance Sheet) (Details) (USD $)In Millions, unless otherwise specified** | Apr. 30, 2012 | Jan. 31, 2012 | Oct. 31, 2011 | Apr. 30, 2011 | Jan. 31, 2011 | Oct. 31, 2010 |
|--------------------------------------------------------------------------------------------------------------------------------------------------------|---------------|---------------|---------------|---------------|---------------|---------------|
| **Assets**                                                                                                                                             |          |          |          |          |          |          |
| Cash and cash equivalents                                                                                                                              | $ 400         | $ 539         | $ 539         | $ 390         | $ 585         | $ 585         |
| Marketable securities                                                                                                                                  | 337           |          | 718           |          |          |          |
| Restricted cash and cash equivalents                                                                                                                   | 145           |          | 327           |          |          |          |
| Finance and other receivables, net                                                                                                                     | 3,599         |          | 4,254         |          |          |          |
| Inventories                                                                                                                                            | 1,948         |          | 1,714         |          |          |          |
| Investments in non-consolidated affiliates                                                                                                             | 58            |          | 60            |          |          |          |
| Property and equipment, net                                                                                                                            | 1,690         |          | 1,570         |          |          |          |
| Goodwill                                                                                                                                               | 295           |          | 319           |          |          |          |
| Deferred taxes, net                                                                                                                                    | 2,238         |          | 2,057         |          |          |          |
| Other                                                                                                                                                  | 674           |          | 733           |          |          |          |
| Total Assets                                                                                                                                           | 11,384        |          | 12,291        |          |          |          |
| **Liabilities and Stockholders' Equity (Deficit)**                                                                                                     |          |          |          |          |          |          |
| Debt                                                                                                                                                   | 4,497         |          | 4,856         |          |          |          |
| Postretirement benefits liabilities                                                                                                                    | 3,214         |          | 3,316         |          |          |          |
| Amounts due to (from) affiliates                                                                                                                       | 0             |          | 0             |          |          |          |
| Other liabilities                                                                                                                                      | 4,080         |          | 4,091         |          |          |          |
| Total Liabilities                                                                                                                                      | 11,791        |          | 12,263        |          |          |          |
| Redeemable equity securities                                                                                                                           | 5             |          | 5             |          |          |          |
| Stockholders' equity attributable to non-controlling interests                                                                                         | 43            |          | 50            |          |          |          |
| Total stockholders' equity (deficit) attributable to Navistar International Corporation                                                                | (455)         |          | (27)          |          |          |          |
| Total Liabilities and Stockholders' Equity (Deficit)                                                                                                   | 11,384        |          | 12,291        |          |          |          |
| NIC [Member]                                                                                                                                           |          |          |          |          |          |          |
| **Assets**                                                                                                                                             |          |          |          |          |          |          |
| Cash and cash equivalents                                                                                                                              | 112           |          | 226           | 176           |          | 239           |
| Marketable securities                                                                                                                                  | 55            |          | 429           |          |          |          |
| Restricted cash and cash equivalents                                                                                                                   | 13            |          | 20            |          |          |          |
| Finance and other receivables, net                                                                                                                     | 5             |          | 3             |          |          |          |
| Inventories                                                                                                                                            | 0             |          | 0             |          |          |          |
| Investments in non-consolidated affiliates                                                                                                             | (2,459)       |          | (2,094)       |          |          |          |
| Property and equipment, net                                                                                                                            | 0             |          | 0             |          |          |          |
| Goodwill                                                                                                                                               | 0             |          | 0             |          |          |          |
| Deferred taxes, net                                                                                                                                    | 44            |          | 31            |          |          |          |
| Other                                                                                                                                                  | 115           |          | 168           |          |          |          |
| Total Assets                                                                                                                                           | (2,115)       |          | (1,217)       |          |          |          |
| **Liabilities and Stockholders' Equity (Deficit)**                                                                                                     |          |          |          |          |          |          |
| Debt                                                                                                                                                   | 1,604         |          | 1,689         |          |          |          |
| Postretirement benefits liabilities                                                                                                                    | 0             |          | 0             |          |          |          |
| Amounts due to (from) affiliates                                                                                                                       | (5,996)       |          | (5,574)       |          |          |          |
| Other liabilities                                                                                                                                      | 2,727         |          | 2,690         |          |          |          |
| Total Liabilities                                                                                                                                      | (1,665)       |          | (1,195)       |          |          |          |
| Redeemable equity securities                                                                                                                           | 5             |          | 5             |          |          |          |
| Stockholders' equity attributable to non-controlling interests                                                                                         | 0             |          | 0             |          |          |          |
| Total stockholders' equity (deficit) attributable to Navistar International Corporation                                                                | (455)         |          | (27)          |          |          |          |
| Total Liabilities and Stockholders' Equity (Deficit)                                                                                                   | (2,115)       |          | (1,217)       |          |          |          |
| Navistar, Inc. [Member]                                                                                                                                |          |          |          |          |          |          |
| **Assets**                                                                                                                                             |          |          |          |          |          |          |
| Cash and cash equivalents                                                                                                                              | 48            |          | 13            | 20            |          | 22            |
| Marketable securities                                                                                                                                  | 0             |          | 1             |          |          |          |
| Restricted cash and cash equivalents                                                                                                                   | 8             |          | 9             |          |          |          |
| Finance and other receivables, net                                                                                                                     | 139           |          | 154           |          |          |          |
| Inventories                                                                                                                                            | 761           |          | 650           |          |          |          |
| Investments in non-consolidated affiliates                                                                                                             | 6,286         |          | 5,818         |          |          |          |
| Property and equipment, net                                                                                                                            | 739           |          | 600           |          |          |          |
| Goodwill                                                                                                                                               | 0             |          | 0             |          |          |          |
| Deferred taxes, net                                                                                                                                    | 1,887         |          | 1,912         |          |          |          |
| Other                                                                                                                                                  | 167           |          | 152           |          |          |          |
| Total Assets                                                                                                                                           | 10,035        |          | 9,309         |          |          |          |
| **Liabilities and Stockholders' Equity (Deficit)**                                                                                                     |          |          |          |          |          |          |
| Debt                                                                                                                                                   | 295           |          | 156           |          |          |          |
| Postretirement benefits liabilities                                                                                                                    | 2,893         |          | 2,981         |          |          |          |
| Amounts due to (from) affiliates                                                                                                                       | 9,753         |          | 9,055         |          |          |          |
| Other liabilities                                                                                                                                      | (49)          |          | (194)         |          |          |          |
| Total Liabilities                                                                                                                                      | 12,892        |          | 11,998        |          |          |          |
| Redeemable equity securities                                                                                                                           | 0             |          | 0             |          |          |          |
| Stockholders' equity attributable to non-controlling interests                                                                                         | 0             |          | 0             |          |          |          |
| Total stockholders' equity (deficit) attributable to Navistar International Corporation                                                                | (2,857)       |          | (2,689)       |          |          |          |
| Total Liabilities and Stockholders' Equity (Deficit)                                                                                                   | 10,035        |          | 9,309         |          |          |          |
| Non-Guarantor Subsidiaries [Member]                                                                                                                    |          |          |          |          |          |          |
| **Assets**                                                                                                                                             |          |          |          |          |          |          |
| Cash and cash equivalents                                                                                                                              | 240           |          | 300           | 194           |          | 324           |
| Marketable securities                                                                                                                                  | 282           |          | 288           |          |          |          |
| Restricted cash and cash equivalents                                                                                                                   | 124           |          | 298           |          |          |          |
| Finance and other receivables, net                                                                                                                     | 3,453         |          | 4,070         |          |          |          |
| Inventories                                                                                                                                            | 1,240         |          | 1,113         |          |          |          |
| Investments in non-consolidated affiliates                                                                                                             | 51            |          | 54            |          |          |          |
| Property and equipment, net                                                                                                                            | 953           |          | 972           |          |          |          |
| Goodwill                                                                                                                                               | 295           |          | 319           |          |          |          |
| Deferred taxes, net                                                                                                                                    | 306           |          | 114           |          |          |          |
| Other                                                                                                                                                  | 394           |          | 416           |          |          |          |
| Total Assets                                                                                                                                           | 7,338         |          | 7,944         |          |          |          |
| **Liabilities and Stockholders' Equity (Deficit)**                                                                                                     |          |          |          |          |          |          |
| Debt                                                                                                                                                   | 2,832         |          | 3,242         |          |          |          |
| Postretirement benefits liabilities                                                                                                                    | 321           |          | 335           |          |          |          |
| Amounts due to (from) affiliates                                                                                                                       | (3,837)       |          | (3,595)       |          |          |          |
| Other liabilities                                                                                                                                      | 1,537         |          | 1,717         |          |          |          |
| Total Liabilities                                                                                                                                      | 853           |          | 1,699         |          |          |          |
| Redeemable equity securities                                                                                                                           | 0             |          | 0             |          |          |          |
| Stockholders' equity attributable to non-controlling interests                                                                                         | 43            |          | 52            |          |          |          |
| Total stockholders' equity (deficit) attributable to Navistar International Corporation                                                                | 6,442         |          | 6,193         |          |          |          |
| Total Liabilities and Stockholders' Equity (Deficit)                                                                                                   | 7,338         |          | 7,944         |          |          |          |
| Eliminations and Other [Member]                                                                                                                        |          |          |          |          |          |          |
| **Assets**                                                                                                                                             |          |          |          |          |          |          |
| Cash and cash equivalents                                                                                                                              | 0             |          | 0             | 0             |          | 0             |
| Marketable securities                                                                                                                                  | 0             |          | 0             |          |          |          |
| Restricted cash and cash equivalents                                                                                                                   | 0             |          | 0             |          |          |          |
| Finance and other receivables, net                                                                                                                     | 2             |          | 27            |          |          |          |
| Inventories                                                                                                                                            | (53)          |          | (49)          |          |          |          |
| Investments in non-consolidated affiliates                                                                                                             | (3,820)       |          | (3,718)       |          |          |          |
| Property and equipment, net                                                                                                                            | (2)           |          | (2)           |          |          |          |
| Goodwill                                                                                                                                               | 0             |          | 0             |          |          |          |
| Deferred taxes, net                                                                                                                                    | 1             |          | 0             |          |          |          |
| Other                                                                                                                                                  | (2)           |          | (3)           |          |          |          |
| Total Assets                                                                                                                                           | (3,874)       |          | (3,745)       |          |          |          |
| **Liabilities and Stockholders' Equity (Deficit)**                                                                                                     |          |          |          |          |          |          |
| Debt                                                                                                                                                   | (234)         |          | (231)         |          |          |          |
| Postretirement benefits liabilities                                                                                                                    | 0             |          | 0             |          |          |          |
| Amounts due to (from) affiliates                                                                                                                       | 80            |          | 114           |          |          |          |
| Other liabilities                                                                                                                                      | (135)         |          | (122)         |          |          |          |
| Total Liabilities                                                                                                                                      | (289)         |          | (239)         |          |          |          |
| Redeemable equity securities                                                                                                                           | 0             |          | 0             |          |          |          |
| Stockholders' equity attributable to non-controlling interests                                                                                         | 0             |          | (2)           |          |          |          |
| Total stockholders' equity (deficit) attributable to Navistar International Corporation                                                                | (3,585)       |          | (3,504)       |          |          |          |
| Total Liabilities and Stockholders' Equity (Deficit)                                                                                                   | $ (3,874)     |          | $ (3,745)     |          |          |          |

| X                                                                                                                                                                                                                      |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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Deferred Taxes Net
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| - Definition
Amount due from customers or clients for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection, and all categories of loans and leases held in portfolio, net of unearned income and the allowance for losses on loans and leases.
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| - Definition
Aggregate carrying amount, as of the balance sheet date, of assets not separately disclosed in the balance sheet, including  the carrying amounts of all intangible assets, excluding goodwill, net of accumulated amortization and impairment charges.
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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
Investments in debt and equity securities which are categorized neither as trading securities nor held-to-maturity securities and which are intended be sold or mature within one year from the balance sheet date or the normal operating cycle, whichever is longer. Such securities are reported at fair value; unrealized gains (losses) related to Available-for-sale Securities are excluded from earnings and reported in a separate component of shareholders' equity (other comprehensive income), unless the Available-for-sale security is designated as a hedge or is determined to have had an other than temporary decline in fair value below its amortized cost basis. All or a portion of the unrealized holding gain (loss) of an Available-for-sale security that is designated as being hedged in a fair value hedge is recognized in earnings during the period of the hedge, as are other than temporary declines in fair value below the cost basis for investments in equity securities and debt securities that an entity intends to sell or it is more likely than not that it will be required to sell before the recovery of its amortized cost basis. Other than temporary declines in fair value below the cost basis for debt securities categorized as Available-for-sale that an entity does not intend to sell and for which it is not more likely than not that the entity will be required to sell before the recovery of its amortized cost basis are bifurcated into credit losses and losses related to all other factors. Other than temporary declines in fair value below cost basis related to credit losses are recognized in earnings, and losses related to all other factors are recognized in other comprehensive income.
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
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 Entity may deposit additional funds at any time and also 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. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents. Includes cash and cash equivalents associated with the entity's continuing operations. Excludes cash and cash equivalents associated with the disposal group (and discontinued operation).
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.
+ References
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| - Definition
Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.
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| - Definition
Carrying amount (lower of cost or market) as of the balance sheet date of inventories less all valuation and other allowances. Excludes noncurrent inventory balances (expected to remain on hand past one year or one operating cycle, if longer).
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| - Definition
Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership.
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| - Definition
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 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
The aggregate carrying amount, as of the balance sheet date, of liabilities not separately disclosed in the balance sheet.
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| - Definition
This represents the entire liability recognized in the balance sheet that is associated with the defined benefit plans.
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Receivables to be collected from (obligations owed to) related parties, net as of the balance sheet date where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth.
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. This element is for unclassified presentations; for classified presentations there is a separate and distinct element.
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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 are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.
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| - Definition
The carrying value (book value) of an entity's issued and outstanding stock which is not included within permanent equity in Stockholders Equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer.
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