Income Taxes	3 Months Ended
Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes For each interim reporting period, the company makes an estimate of the effective tax rate expected to be applicable for the full fiscal year pursuant to FASB ASC Topic 740-270, "Accounting for Income Taxes in Interim Periods." The rate so determined is used in providing for income taxes on a year-to-date basis. Jurisdictions with a projected loss for the year or an actual year-to-date loss where no tax benefit can be recognized are excluded from the estimated annual effective tax rate. The impact of including these jurisdictions on the quarterly effective rate calculation could result in a higher or lower effective tax rate during a particular quarter, based upon the mix and timing of actual earnings versus annual projections. Income tax expense (benefit) is allocated among continuing operations, discontinued operations and other comprehensive income ("OCI"). Such allocation is applied by tax jurisdiction, and in periods in which there is a pre-tax loss from continuing operations and pre-tax income in another category, such as discontinued operations or OCI, income tax expense is allocated to the other sources of income, with a related benefit recorded in continuing operations. On December 22, 2017, the U.S. government enacted the U.S. tax reform. The U.S. tax reform made broad and complex changes to the U.S. tax code that affected the company's fiscal year ended September 30, 2018, including, but not limited to, reducing the U.S. federal corporate tax rate and requiring a one-time transition tax on certain unrepatriated earnings of foreign subsidiaries. The U.S. tax reform reduced the federal corporate tax rate to 21 percent effective January 1, 2018. The SEC staff issued Staff Accounting Bulletin ("SAB") 118, which provides guidance on accounting for the tax effects of the U.S. tax reform. SAB 118 provides a measurement period that should not extend beyond one year from the U.S. tax reform enactment date for companies to complete the accounting under ASC 740. In accordance with SAB 118, a company must reflect the income tax effects of those aspects of the U.S. tax reform for which the accounting under ASC 740 is complete. To the extent that a company’s accounting for certain income tax effects of the U.S. tax reform is incomplete but the company is able to determine a reasonable estimate, it must record a provisional estimate in the financial statements. If a company cannot determine a provisional estimate to be included in the financial statements, it should continue to apply ASC 740 on the basis of the provisions of the tax laws that were in effect immediately before the enactment of the U.S. tax reform. Specifically, the company included discrete tax expense in its first quarter financial statements for fiscal year 2018 related to provisional amounts under SAB 118 for the impact of the revaluation of U.S. deferred tax assets and liabilities due to the federal income tax rate reduction from 35 percent to 21 percent. Additionally, the company estimated its liability and included provisional amounts for the one-time transition tax as a discrete tax expense. The company will elect to offset the liability associated with this transition tax by utilizing foreign tax credit carryovers. The revaluation of the deferred tax assets and the transition tax resulted in a non-cash charge of $77 million in the first quarter of fiscal year 2018. In the first quarter of fiscal 2019, a $7 million income tax net benefit was recorded which consists of an income tax benefit of $11 million for refinement of the transition tax and $4 million income tax expense for refinement of other adjustments. Tax expense related to the transition tax and rate change on net deferred tax assets and liabilities as of December 31, 2018 is now considered complete under SAB 118. Additionally, as of December 31, 2018, the company has accounted for the tax impacts related to the Global Intangible Low Tax Income ("GILTI"), Base Erosion Anti Abuse Tax ("BEAT") and Foreign Derived Intangible Income ("FDII") regimes as well as all other provisions of the U.S. tax reform that are effective in fiscal year 2019. The company has elected to treat GILTI as a period cost and, therefore, has not recognized deferred taxes for basis differences that may reverse as GILTI tax in future periods. In evaluating the ability to recover its net deferred tax assets, the company utilizes a consistent approach which considers its historical operating results, including an assessment of the degree to which any gains or losses are driven by items that are unusual in nature, and tax planning strategies. In addition, the company reviews changes in near-term market conditions and other factors that impact future operating results. In fiscal year 2018, after sustained profitability and improved market conditions, the valuation allowance in Brazil was reversed. As of December 31, 2018, the company continues to maintain the valuation allowances in France, the U.K., and certain other jurisdictions, as the company believes the negative evidence that it will be able to recover these net deferred tax assets continues to outweigh the positive evidence. If, in the future, the company generates taxable income on a sustained basis, its conclusion regarding the need for valuation allowances in these jurisdictions could change. For the three months ended December 31, 2018, the company had approximately $6 million of net pre-tax income compared to $2 million of net pre-tax income in the same period in fiscal year 2018 in tax jurisdictions in which tax expense (benefit) is not recorded.

Income Taxes

For each interim reporting period, the company makes an estimate of the effective tax rate expected to be applicable for the full fiscal year pursuant to FASB ASC Topic 740-270, "Accounting for Income Taxes in Interim Periods." The rate so determined is used in providing for income taxes on a year-to-date basis. Jurisdictions with a projected loss for the year or an actual year-to-date loss where no tax benefit can be recognized are excluded from the estimated annual effective tax rate. The impact of including these jurisdictions on the quarterly effective rate calculation could result in a higher or lower effective tax rate during a particular quarter, based upon the mix and timing of actual earnings versus annual projections.

Income tax expense (benefit) is allocated among continuing operations, discontinued operations and other comprehensive income ("OCI"). Such allocation is applied by tax jurisdiction, and in periods in which there is a pre-tax loss from continuing operations and pre-tax income in another category, such as discontinued operations or OCI, income tax expense is allocated to the other sources of income, with a related benefit recorded in continuing operations.

On December 22, 2017, the U.S. government enacted the U.S. tax reform. The U.S. tax reform made broad and complex changes to the U.S. tax code that affected the company's fiscal year ended September 30, 2018, including, but not limited to, reducing the U.S. federal corporate tax rate and requiring a one-time transition tax on certain unrepatriated earnings of foreign subsidiaries. The U.S. tax reform reduced the federal corporate tax rate to 21 percent effective January 1, 2018.

The SEC staff issued Staff Accounting Bulletin ("SAB") 118, which provides guidance on accounting for the tax effects of the U.S. tax reform. SAB 118 provides a measurement period that should not extend beyond one year from the U.S. tax reform enactment date for companies to complete the accounting under ASC 740. In accordance with SAB 118, a company must reflect the income tax effects of those aspects of the U.S. tax reform for which the accounting under ASC 740 is complete. To the extent that a company’s accounting for certain income tax effects of the U.S. tax reform is incomplete but the company is able to determine a reasonable estimate, it must record a provisional estimate in the financial statements. If a company cannot determine a provisional estimate to be included in the financial statements, it should continue to apply ASC 740 on the basis of the provisions of the tax laws that were in effect immediately before the enactment of the U.S. tax reform.

Specifically, the company included discrete tax expense in its first quarter financial statements for fiscal year 2018 related to provisional amounts under SAB 118 for the impact of the revaluation of U.S. deferred tax assets and liabilities due to the federal income tax rate reduction from 35 percent to 21 percent. Additionally, the company estimated its liability and included provisional amounts for the one-time transition tax as a discrete tax expense. The company will elect to offset the liability associated with this transition tax by utilizing foreign tax credit carryovers. The revaluation of the deferred tax assets and the transition tax resulted in a non-cash charge of $77 million in the first quarter of fiscal year 2018. In the first quarter of fiscal 2019, a $7 million income tax net benefit was recorded which consists of an income tax benefit of $11 million for refinement of the transition tax and $4 million income tax expense for refinement of other adjustments.

Tax expense related to the transition tax and rate change on net deferred tax assets and liabilities as of December 31, 2018 is now considered complete under SAB 118. Additionally, as of December 31, 2018, the company has accounted for the tax impacts related to the Global Intangible Low Tax Income ("GILTI"), Base Erosion Anti Abuse Tax ("BEAT") and Foreign Derived Intangible Income ("FDII") regimes as well as all other provisions of the U.S. tax reform that are effective in fiscal year 2019. The company has elected to treat GILTI as a period cost and, therefore, has not recognized deferred taxes for basis differences that may reverse as GILTI tax in future periods.

In evaluating the ability to recover its net deferred tax assets, the company utilizes a consistent approach which considers its historical operating results, including an assessment of the degree to which any gains or losses are driven by items that are unusual in nature, and tax planning strategies. In addition, the company reviews changes in near-term market conditions and other factors that impact future operating results. In fiscal year 2018, after sustained profitability and improved market conditions, the valuation allowance in Brazil was reversed. As of December 31, 2018, the company continues to maintain the valuation allowances in France, the U.K., and certain other jurisdictions, as the company believes the negative evidence that it will be able to recover these net deferred tax assets continues to outweigh the positive evidence. If, in the future, the company generates taxable income on a sustained basis, its conclusion regarding the need for valuation allowances in these jurisdictions could change.

For the three months ended December 31, 2018, the company had approximately $6 million of net pre-tax income compared to $2 million of net pre-tax income in the same period in fiscal year 2018 in tax jurisdictions in which tax expense (benefit) is not recorded.