Recent Accounting Pronouncements	6 Months Ended
Mar. 31, 2019
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements Recently Adopted Accounting Standards In January 2016, the FASB issued guidance that generally requires companies to measure investments in other entities, except those accounted for under the equity method, at fair value and recognize any changes in fair value in net income. The guidance was effective for fiscal years and interim periods within those fiscal years, beginning after December 15, 2017 (first quarter of fiscal 2019 for us). The adoption of this guidance had no impact on our consolidated financial statements. In March 2016, the FASB issued updated guidance which requires excess tax benefits and deficiencies on share-based payments to be recorded as income tax expense or benefit in the income statement rather than being recorded in additional paid-in capital. It also requires the presentation of employee taxes as financing activities on consolidated statements of cash flows, which was previously classified as operating activities. This guidance was effective for annual and interim periods beginning after December 15, 2016 (first quarter of fiscal 2018 for us), with early adoption permitted. In the first quarter of fiscal 2017, we adopted this guidance. At the beginning of fiscal 2019, we revised the presentation of "Net cash provided by operating activities" and "Net cash (used in) provided by financing activities" in the consolidated statement of cash flows for prior period to correct the presentation of “Taxes paid on vested restricted stock” and appropriately reflect such amounts as financing activities. The correction resulted in an increase of net cash provided by operating activities of $8.8 million and a decrease of net cash provided by financing activities of $8.8 million for the six months ended April 1, 2018. We assessed the materiality of these errors on our consolidated financial statements for prior periods and concluded that the amounts were not material to any prior interim or annual periods. We elected to revise the presentation for comparability purposes. In August 2016, the FASB issued guidance to address eight specific cash flow issues to reduce the existing diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. The guidance was effective for fiscal years and interim periods within those fiscal years, beginning after December 15, 2017 (first quarter of fiscal 2019 for us). The adoption of this guidance had no material impact on our consolidated financial statements. In October 2016, the FASB issued updated guidance which requires entities to recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. The guidance was effective for fiscal reporting periods and interim reporting periods within those fiscal reporting periods, beginning after December 15, 2017 (first quarter of fiscal 2019 for us). The adoption of this guidance had no material impact on our consolidated financial statements. In November 2016, the FASB issued updated guidance which provides amendments to address the classification and presentation of changes in restricted cash in the statement of cash flows. The guidance was effective for fiscal years and interim periods within those fiscal years, beginning after December 15, 2017 (first quarter of fiscal 2019 for us). The adoption of this guidance had no material impact on our consolidated financial statements. We updated certain captions in our consolidated statements of cash flows to include restricted cash, which is reported in our "Prepaid expenses and other current assets" on the consolidated balance sheets. In May 2017, the FASB issued updated guidance to clarify when changes to the terms or conditions of a share-based payment award must be accounted for as modifications. Under the updated guidance, modification accounting is required only if the fair value, the vesting conditions, or the classification of the award changes because of a change in terms or conditions. The guidance was effective for fiscal years and interim periods within those fiscal years, beginning after December 15, 2017 (first quarter of fiscal 2019 for us), on a prospective basis. The adoption of this guidance had no impact on our consolidated financial statements. In August 2018, the Securities and Exchange Commission (“SEC”) published Release No. 33-10532, Disclosure Update and Simplification, which adopted amendments to certain disclosure requirements that have become redundant, duplicative, overlapping, outdated or superseded, considering other SEC disclosure requirements, U.S. GAAP, or changes in the information environment. While most of the amendments eliminate outdated or duplicative disclosure requirements, the final rule amends the interim financial statement requirements to include a reconciliation of changes in stockholders’ equity in the notes or as a separate statement for each period for which a statement of comprehensive income is required to be filed. The new interim reconciliation of changes in stockholders’ equity is included herein as a separate statement. Additionally, we removed the disclosure on cash dividends paid per share from our consolidated statements of income. Recently Issued Accounting Standards Not Yet Adopted In February 2016, the FASB issued guidance that requires the rights and obligations associated with leasing arrangements be reflected on the balance sheet to increase transparency and comparability among organizations. Under the guidance, lessees will be required to recognize a right-of-use asset and a liability to make lease payments and disclose key information about leasing arrangements. The guidance is effective for fiscal years and interim periods within those fiscal years, beginning after December 15, 2018 (first quarter of fiscal 2020 for us). Early adoption is permitted, and the standard must be adopted using a modified retrospective approach. In July 2018, the FASB issued updated guidance, which provides entities with an additional transition method to adopt the lease accounting guidance. Under the new transition method, an entity initially applies the new standard at the adoption date, versus at the beginning of the earliest period presented, and recognizes a cumulative-effective adjustment to the opening balance of retained earnings in the period of adoption, if any. While we are currently evaluating the impact that this guidance will have on our consolidated financial statements, we currently expect that the adoption of the new guidance will result in a significant increase in the assets and liabilities on our consolidated balance sheets and will likely have no impact on our consolidated statements of income and cash flows. In June 2016, the FASB issued updated guidance which requires entities to estimate all expected credit losses for certain types of financial instruments, including trade receivables, held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. The updated guidance also expands the disclosure requirements to enable users of financial statements to understand the entity’s assumptions, models and methods for estimating expected credit losses. This guidance is effective for fiscal years and interim periods within those fiscal years, beginning after December 15, 2019 (first quarter of fiscal 2021 for us). Early adoption is permitted. We are currently evaluating the impact that this guidance will have on our consolidated financial statements. In August 2017, the FASB issued accounting guidance on hedging activities. The amendment better aligns an entity’s risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. The guidance is effective for fiscal years and interim periods within those fiscal years, beginning after December 15, 2018 (first quarter of fiscal 2020 for us). Early adoption is permitted. We are currently evaluating the impact that this guidance will have on our consolidated financial statements. In February 2018, the FASB issued guidance on reclassification of certain tax effects from accumulated comprehensive income, which allows for a reclassification of stranded tax effects from the Tax Cuts and Jobs Act ("TCJA") from accumulated other comprehensive income to retained earnings. The guidance is effective for fiscal years beginning after December 15, 2018 (first quarter of fiscal 2020 for us). We are currently evaluating the impact that this guidance will have on our consolidated financial statements.

Recent Accounting Pronouncements

Recently Adopted Accounting Standards

In January 2016, the FASB issued guidance that generally requires companies to measure investments in other entities, except those accounted for under the equity method, at fair value and recognize any changes in fair value in net income. The guidance was effective for fiscal years and interim periods within those fiscal years, beginning after December 15, 2017 (first quarter of fiscal 2019 for us). The adoption of this guidance had no impact on our consolidated financial statements.

In March 2016, the FASB issued updated guidance which requires excess tax benefits and deficiencies on share-based payments to be recorded as income tax expense or benefit in the income statement rather than being recorded in additional paid-in capital. It also requires the presentation of employee taxes as financing activities on consolidated statements of cash flows, which was previously classified as operating activities. This guidance was effective for annual and interim periods beginning after December 15, 2016 (first quarter of fiscal 2018 for us), with early adoption permitted. In the first quarter of fiscal 2017, we adopted this guidance. At the beginning of fiscal 2019, we revised the presentation of "Net cash provided by operating activities" and "Net cash (used in) provided by financing activities" in the consolidated statement of cash flows for prior period to correct the presentation of “Taxes paid on vested restricted stock” and appropriately reflect such amounts as financing activities. The correction resulted in an increase of net cash provided by operating activities of $8.8 million and a decrease of net cash provided by financing activities of $8.8 million for the six months ended April 1, 2018. We assessed the materiality of these errors on our consolidated financial statements for prior periods and concluded that the amounts were not material to any prior interim or annual periods. We elected to revise the presentation for comparability purposes.

In August 2016, the FASB issued guidance to address eight specific cash flow issues to reduce the existing diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. The guidance was effective for fiscal years and interim periods within those fiscal years, beginning after December 15, 2017 (first quarter of fiscal 2019 for us). The adoption of this guidance had no material impact on our consolidated financial statements.

In October 2016, the FASB issued updated guidance which requires entities to recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. The guidance was effective for fiscal reporting periods and interim reporting periods within those fiscal reporting periods, beginning after December 15, 2017 (first quarter of fiscal 2019 for us). The adoption of this guidance had no material impact on our consolidated financial statements.

In November 2016, the FASB issued updated guidance which provides amendments to address the classification and presentation of changes in restricted cash in the statement of cash flows. The guidance was effective for fiscal years and interim periods within those fiscal years, beginning after December 15, 2017 (first quarter of fiscal 2019 for us). The adoption of this guidance had no material impact on our consolidated financial statements. We updated certain captions in our consolidated statements of cash flows to include restricted cash, which is reported in our "Prepaid expenses and other current assets" on the consolidated balance sheets.

In May 2017, the FASB issued updated guidance to clarify when changes to the terms or conditions of a share-based payment award must be accounted for as modifications. Under the updated guidance, modification accounting is required only if the fair value, the vesting conditions, or the classification of the award changes because of a change in terms or conditions. The guidance was effective for fiscal years and interim periods within those fiscal years, beginning after December 15, 2017 (first quarter of fiscal 2019 for us), on a prospective basis. The adoption of this guidance had no impact on our consolidated financial statements.

In August 2018, the Securities and Exchange Commission (“SEC”) published Release No. 33-10532, Disclosure Update and Simplification, which adopted amendments to certain disclosure requirements that have become redundant, duplicative, overlapping, outdated or superseded, considering other SEC disclosure requirements, U.S. GAAP, or changes in the information environment. While most of the amendments eliminate outdated or duplicative disclosure requirements, the final rule amends the interim financial statement requirements to include a reconciliation of changes in stockholders’ equity in the notes or as a separate statement for each period for which a statement of comprehensive income is required to be filed. The new interim reconciliation of changes in stockholders’ equity is included herein as a separate statement. Additionally, we removed the disclosure on cash dividends paid per share from our consolidated statements of income.

Recently Issued Accounting Standards Not Yet Adopted

In February 2016, the FASB issued guidance that requires the rights and obligations associated with leasing arrangements be reflected on the balance sheet to increase transparency and comparability among organizations. Under the guidance, lessees will be required to recognize a right-of-use asset and a liability to make lease payments and disclose key information about leasing arrangements. The guidance is effective for fiscal years and interim periods within those fiscal years, beginning after December 15, 2018 (first quarter of fiscal 2020 for us). Early adoption is permitted, and the standard must be adopted using a modified retrospective approach. In July 2018, the FASB issued updated guidance, which provides entities with an additional transition method to adopt the lease accounting guidance. Under the new transition method, an entity initially applies the new standard at the adoption date, versus at the beginning of the earliest period presented, and recognizes a cumulative-effective adjustment to the opening balance of retained earnings in the period of adoption, if any. While we are currently evaluating the impact that this guidance will have on our consolidated financial statements, we currently expect that the adoption of the new guidance will result in a significant increase in the assets and liabilities on our consolidated balance sheets and will likely have no impact on our consolidated statements of income and cash flows.

In June 2016, the FASB issued updated guidance which requires entities to estimate all expected credit losses for certain types of financial instruments, including trade receivables, held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. The updated guidance also expands the disclosure requirements to enable users of financial statements to understand the entity’s assumptions, models and methods for estimating expected credit losses. This guidance is effective for fiscal years and interim periods within those fiscal years, beginning after December 15, 2019 (first quarter of fiscal 2021 for us). Early adoption is permitted. We are currently evaluating the impact that this guidance will have on our consolidated financial statements.

In August 2017, the FASB issued accounting guidance on hedging activities. The amendment better aligns an entity’s risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. The guidance is effective for fiscal years and interim periods within those fiscal years, beginning after December 15, 2018 (first quarter of fiscal 2020 for us). Early adoption is permitted. We are currently evaluating the impact that this guidance will have on our consolidated financial statements.

In February 2018, the FASB issued guidance on reclassification of certain tax effects from accumulated comprehensive income, which allows for a reclassification of stranded tax effects from the Tax Cuts and Jobs Act ("TCJA") from accumulated other comprehensive income to retained earnings. The guidance is effective for fiscal years beginning after December 15, 2018 (first quarter of fiscal 2020 for us). We are currently evaluating the impact that this guidance will have on our consolidated financial statements.