Accounting Changes	12 Months Ended
Accounting Changes	Sep. 30, 2019
Accounting Changes and Error Corrections [Abstract]
Accounting Changes	Accounting Changes New Accounting Principles Adopted On October 1, 2018, the Company adopted Accounting Standards Codification Topic 606, "Revenue from Contracts with Customers" ("ASC 606") using the modified retrospective method. Under ASC 606, revenue is recognized upon the transfer of control of goods or services to customers and reflects the amount of consideration to which a reporting entity expects to be entitled in exchange for those goods or services. The Company assessed the impact of this new standard on its consolidated financial statements based upon a review of contracts that were not completed as of October 1, 2018. Amounts presented in the Company's financial statements for the prior-year periods have not been revised and are reflective of the revenue recognition requirements which were in effect for those periods. This accounting standard adoption, which is further discussed in Note 6, did not materially impact any line items of the Company's consolidated income statements and balance sheet. On October 1, 2018, the Company retrospectively adopted an accounting standard update which requires all components of net periodic pension and postretirement benefit costs to be disaggregated from the service cost component and to be presented on the income statement outside a subtotal of income from operations, if one is presented. Upon the Company's adoption of the accounting standard update, which did not have a material impact on its consolidated financial statements, all components of the Company’s net periodic pension and postretirement benefit costs, aside from service cost, are recorded to Other income (expense), net on its consolidated income statements for all periods presented. Revisions of prior-year amounts were estimated based upon previously disclosed amounts. On October 1, 2018, the Company adopted an accounting standard update which requires that the income tax effects of intercompany sales or transfers of assets, except those involving inventory, be recognized in the income statement as income tax expense (or benefit) in the period that the sale or transfer occurs. The Company adopted this accounting standard update, which did not have a material impact on its consolidated financial statements, using the modified retrospective method. In the second quarter of its fiscal year 2018, the Company prospectively adopted an accounting standard update relating to the stranded income tax effects on items within Accumulated other comprehensive income (loss) resulting from the enactment of new U.S. tax legislation, which legislation is further discussed in Note 17. Additional disclosures regarding this accounting standard adoption are provided in Note 3. On October 1, 2016, the Company prospectively adopted amended requirements relating to the timing of recognition and classification of share-based compensation award-related income tax effects. Upon adoption of the requirements in 2017, the Company has recorded tax benefits relating to share-based compensation awards within Income tax (benefit) provision on its consolidated statement of income. These tax benefits had been previously recorded within Capital in excess of par value on the Company's consolidated balance sheet. Also upon adoption of the amended guidance in 2017, the Company has classified excess tax benefits on its consolidated statement of cash flows within Net Cash Provided by Operating Activities, rather than Net Cash (Used for) Provided by Financing Activities. New Accounting Principles Not Yet Adopted In February 2016, the Financial Accounting Standards Board ("FASB") issued a new lease accounting standard which requires lessees to recognize lease assets and lease liabilities on the balance sheet. The new standard also requires expanded disclosures regarding leasing arrangements. The Company will adopt the standard on October 1, 2019 and expects to elect certain practical expedients permitted under the transition guidance, including a transition method which allows application of the new standard at its adoption date, rather than at the earliest comparative period presented in the financial statements. The Company has also elected a practical expedient which allows entities to account for the lease and non-lease components in an arrangement as a single lease component. Upon adoption of the standard, the Company's operating leases will be recognized as right-of-use assets and corresponding lease liabilities on its consolidated balance sheet. The Company's measurement of these assets and liabilities will be finalized during the first quarter of fiscal year 2020. The Company does not expect the adoption of this standard to materially impact its consolidated financial statements. In June 2016, the FASB issued a new accounting standard which requires earlier recognition of credit losses on loans and other financial instruments held by entities, including trade receivables. The new standard requires entities to measure all expected credit losses for financial assets held at each reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. The Company is currently evaluating the impact that this new accounting standard will have on its consolidated financial statements upon its adoption on October 1, 2020.