Income Taxes	9 Months Ended
Jul. 31, 2013
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes We compute on a quarterly basis an estimated annual effective tax rate considering ordinary income and related income tax expense. U.S. results in 2013, as well as certain foreign results in both 2013 and 2012, are excluded from ordinary income due to ordinary losses for which no benefit can be recognized. Ordinary income refers to income (loss) before income tax expense excluding significant unusual or infrequently occurring items. Our effective tax rate in the third quarter and first nine months of 2013 differed from the U.S. statutory rate due to the geographical mix of the jurisdictions recognizing earnings or losses, and the impact from uncertain tax positions. Our effective tax rate for the third quarter of 2012 differed from the U.S. statutory rate due to $173 million of income tax benefit resulting from a third quarter change in the estimated 2012 annual effective tax rate. The tax effect of a significant unusual or infrequently occurring item is recorded in the interim period in which it occurs. Items included in income tax expense in the periods in which they occur include the tax effects of material restructurings and impairments, cumulative effect of changes in tax laws or rates, foreign exchange gains and losses, adjustments to uncertain tax positions, and adjustments to our valuation allowance due to changes in judgment regarding the ability to realize deferred tax assets in future years. We evaluated the need to maintain or establish a valuation allowance for deferred tax assets based on our assessment of whether it is more likely than not that deferred tax benefits will be realized through the generation of future taxable income. Appropriate consideration is given to all available evidence, both positive and negative, in assessing the need for a valuation allowance. We continue to maintain a valuation allowance on our U.S. deferred tax assets, as well as certain foreign deferred tax assets, that we believe, on a more-likely-than-not basis, will not be realized. For all remaining deferred tax assets, while we believe that it is more likely than not that they will be realized, we believe that it is reasonably possible that additional deferred tax asset valuation allowances could be required in the next twelve months. In 2012, our evaluation resulted in the determination that a significant portion of our valuation allowance on our Canadian deferred tax assets could be released. The qualitative and quantitative analysis of current and expected earnings, industry volumes, tax planning strategies, and general business risks resulted in a more likely than not conclusion of being able to realize a significant portion of our Canadian deferred tax assets. We have realized the benefits of the shift in our Canadian business model from a truck manufacturer to a truck distributor, combined with our existing Parts business. As a result of our analysis, we recognized an income tax benefit of $181 million from the release of valuation allowances in the second quarter of 2012. We recognize the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the consolidated financial statements from such a position are measured based on the largest benefit that has a greater than fifty percent likelihood of being realized upon ultimate settlement. As of July 31, 2013, the amount of liability for uncertain tax positions was $90 million. If the unrecognized tax benefits are recognized, $84 million would impact our effective tax rate. However, to the extent we continue to maintain a full valuation allowance against certain deferred tax assets, the effect may be in the form of an increase in the deferred tax asset related to our net operating loss carry forward, which would be offset by a full valuation allowance. We recognize interest and penalties related to uncertain tax positions as part of Income tax benefit (expense). For the three and nine months ended July 31, 2013, the total interest and penalties related to our uncertain tax positions were $2 million and $8 million respectively, reflecting the ongoing resolution of audits in various jurisdictions. We have open tax years back to 2001 with various significant taxing jurisdictions including the U.S., Canada, Mexico, and Brazil. In connection with the examination of tax returns, contingencies may arise that generally result from differing interpretations of applicable tax laws and regulations as they relate to the amount, timing, or inclusion of revenues or expenses in taxable income, or the sustainability of tax credits to reduce income taxes payable. We believe we have sufficient accruals for our contingent tax liabilities. Interim tax provisions include amounts considered sufficient to pay assessments that may result from examinations of prior year tax returns, although actual results may differ. While it is probable that the liability for unrecognized tax benefits may increase or decrease during the next twelve months, we do not expect any such change would have a material effect on our financial condition, results of operations, or cash flows.

Income Taxes

We compute on a quarterly basis an estimated annual effective tax rate considering ordinary income and related income tax expense. U.S. results in 2013, as well as certain foreign results in both 2013 and 2012, are excluded from ordinary income due to ordinary losses for which no benefit can be recognized. Ordinary income refers to income (loss) before income tax expense excluding significant unusual or infrequently occurring items. Our effective tax rate in the third quarter and first nine months of 2013 differed from the U.S. statutory rate due to the geographical mix of the jurisdictions recognizing earnings or losses, and the impact from uncertain tax positions. Our effective tax rate for the third quarter of 2012 differed from the U.S. statutory rate due to $173 million of income tax benefit resulting from a third quarter change in the estimated 2012 annual effective tax rate. The tax effect of a significant unusual or infrequently occurring item is recorded in the interim period in which it occurs. Items included in income tax expense in the periods in which they occur include the tax effects of material restructurings and impairments, cumulative effect of changes in tax laws or rates, foreign exchange gains and losses, adjustments to uncertain tax positions, and adjustments to our valuation allowance due to changes in judgment regarding the ability to realize deferred tax assets in future years.

We evaluated the need to maintain or establish a valuation allowance for deferred tax assets based on our assessment of whether it is more likely than not that deferred tax benefits will be realized through the generation of future taxable income. Appropriate consideration is given to all available evidence, both positive and negative, in assessing the need for a valuation allowance. We continue to maintain a valuation allowance on our U.S. deferred tax assets, as well as certain foreign deferred tax assets, that we believe, on a more-likely-than-not basis, will not be realized. For all remaining deferred tax assets, while we believe that it is more likely than not that they will be realized, we believe that it is reasonably possible that additional deferred tax asset valuation allowances could be required in the next twelve months.

In 2012, our evaluation resulted in the determination that a significant portion of our valuation allowance on our Canadian deferred tax assets could be released. The qualitative and quantitative analysis of current and expected earnings, industry volumes, tax planning strategies, and general business risks resulted in a more likely than not conclusion of being able to realize a significant portion of our Canadian deferred tax assets. We have realized the benefits of the shift in our Canadian business model from a truck manufacturer to a truck distributor, combined with our existing Parts business. As a result of our analysis, we recognized an income tax benefit of $181 million from the release of valuation allowances in the second quarter of 2012.

We recognize the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the consolidated financial statements from such a position are measured based on the largest benefit that has a greater than fifty percent likelihood of being realized upon ultimate settlement. As of July 31, 2013, the amount of liability for uncertain tax positions was $90 million. If the unrecognized tax benefits are recognized, $84 million would impact our effective tax rate. However, to the extent we continue to maintain a full valuation allowance against certain deferred tax assets, the effect may be in the form of an increase in the deferred tax asset related to our net operating loss carry forward, which would be offset by a full valuation allowance.

We recognize interest and penalties related to uncertain tax positions as part of Income tax benefit (expense). For the three and nine months ended July 31, 2013, the total interest and penalties related to our uncertain tax positions were $2 million and $8 million respectively, reflecting the ongoing resolution of audits in various jurisdictions.

We have open tax years back to 2001 with various significant taxing jurisdictions including the U.S., Canada, Mexico, and Brazil. In connection with the examination of tax returns, contingencies may arise that generally result from differing interpretations of applicable tax laws and regulations as they relate to the amount, timing, or inclusion of revenues or expenses in taxable income, or the sustainability of tax credits to reduce income taxes payable. We believe we have sufficient accruals for our contingent tax liabilities. Interim tax provisions include amounts considered sufficient to pay assessments that may result from examinations of prior year tax returns, although actual results may differ. While it is probable that the liability for unrecognized tax benefits may increase or decrease during the next twelve months, we do not expect any such change would have a material effect on our financial condition, results of operations, or cash flows.