Recent Accounting Pronouncements	6 Months Ended
Mar. 31, 2020
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
Recent Accounting Pronouncements	2.Recent Accounting Pronouncements Leases In February 2016, the FASB issued ASU No. 2016-02, Leases. The updated accounting guidance requires lessees to recognize all leases on their balance sheet as a right-of-use asset and a lease liability with the exception of short-term leases. For income statement purposes, the criteria for recognition, measurement and presentation of expense is largely similar to previous guidance, but without the requirement to use bright-line tests in the determination of lease classification. In July 2018, the FASB issued ASU No. 2018-11, Leases: Targeted Improvements, which allows entities the option to adopt this standard using the modified retrospective transition method and include required disclosures for prior periods. This update added a transition option which allows for the recognition of a cumulative effect adjustment to the opening balance of retained earnings in the period of adoption without recasting the consolidated financial statements in periods prior to adoption. On October 1, 2019, the Company elected to adopt the standard using the modified retrospective approach applied to lease arrangements that were in place on the date of initial adoption. Results for reporting periods beginning October 1, 2019 are presented under the new standard, while prior-period amounts are not adjusted and continue to be reported in accordance with historical accounting under ASC 840, Leases. The Company elected the package of practical expedients permitted under the transition guidance within the new standard, which among other things, allowed the Company to carry forward the historical lease classification. As an accounting policy election, the Company excluded short-term leases (term of 12 months or less) from the balance sheet and accounts for non-lease and lease components in a contract as a single component for all asset classes. The Company recorded a lease liability of $76.3 and a corresponding right-of-use asset of $70.6 upon adoption of the new lease standard at October 1, 2019. The right-of-use asset and lease liability recorded as of October 1, 2019 include, respectively, amounts previously classified as deferred rent obligations and exit/disposal liabilities, and prepaid rent, totaling approximately $5.7. The Company’s finance lease assets and liabilities, which are disclosed in Note 11 “Leases”, remain largely unchanged under the lease accounting standard. The standard did not have a material impact on the Company’s results of operations or liquidity. The guidance did not have a material impact on its debt covenant compliance. Measurement of Credit Losses In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurements of Credit Losses on Financial Instruments, which was amended in May 2019 by ASU No. 2019-04, Codification Improvements to Topic 326, Financial Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments and ASU No. 2019-05, Financial Instruments – Credit Losses (Topic 326): Targeted Transition Relief. These ASUs require entities to account for expected credit losses on financial instruments including trade receivables. The guidance is effective for the Company in the first quarter of fiscal 2021 and early adoption is permitted. The Company is currently evaluating the impact of the updated guidance on its consolidated financial statements. Fair Value Measurement In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement which modifies the disclosures on fair value measurements by removing the requirement to disclose the amount and reason for transfers between Level 1 and Level 2 of the fair value hierarchy and the policy for timing of such transfers. The ASU expands the disclosure requirements for Level 3 fair value measurements, primarily focused on changes in unrealized gains and losses included in other comprehensive income. The guidance is effective for the Company in the first quarter of fiscal 2021. Early adoption is permitted for any removed or modified disclosures and adoption of the additional disclosures can be delayed until the effective date. The Company does not currently expect the adoption of ASU 2018-13 to have a material impact on its consolidated financial statements and disclosures. Simplifying the Accounting for Income Taxes In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes which simplifies the accounting for income taxes. The ASU removes specified exceptions and adds requirements to simplify the accounting for income taxes. The guidance is effective for the Company in the first quarter of fiscal 2022 and early adoption is permitted. The Company is currently evaluating the impact of the updated guidance on its consolidated financial statements. Reference Rate Reform In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting which provides optional expedients and exceptions for the accounting for contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. The guidance is effective for the Company upon issuance through December 31, 2022. The Company is currently evaluating the impact of the updated guidance on its consolidated financial statements.

Recent Accounting Pronouncements

6 Months Ended

Mar. 31, 2020

New Accounting Pronouncements And Changes In Accounting Principles [Abstract]

2.Recent Accounting Pronouncements

Leases

In February 2016, the FASB issued ASU No. 2016-02, Leases. The updated accounting guidance requires lessees to recognize all leases on their balance sheet as a right-of-use asset and a lease liability with the exception of short-term leases. For income statement purposes, the criteria for recognition, measurement and presentation of expense is largely similar to previous guidance, but without the requirement to use bright-line tests in the determination of lease classification. In July 2018, the FASB issued ASU No. 2018-11, Leases: Targeted Improvements, which allows entities the option to adopt this standard using the modified retrospective transition method and include required disclosures for prior periods. This update added a transition option which allows for the recognition of a cumulative effect adjustment to the opening balance of retained earnings in the period of adoption without recasting the consolidated financial statements in periods prior to adoption.

On October 1, 2019, the Company elected to adopt the standard using the modified retrospective approach applied to lease arrangements that were in place on the date of initial adoption. Results for reporting periods beginning October 1, 2019 are presented under the new standard, while prior-period amounts are not adjusted and continue to be reported in accordance with historical accounting under ASC 840, Leases.

The Company elected the package of practical expedients permitted under the transition guidance within the new standard, which among other things, allowed the Company to carry forward the historical lease classification. As an accounting policy election, the Company excluded short-term leases (term of 12 months or less) from the balance sheet and accounts for non-lease and lease components in a contract as a single component for all asset classes.

The Company recorded a lease liability of $76.3 and a corresponding right-of-use asset of $70.6 upon adoption of the new lease standard at October 1, 2019. The right-of-use asset and lease liability recorded as of October 1, 2019 include, respectively, amounts previously classified as deferred rent obligations and exit/disposal liabilities, and prepaid rent, totaling approximately $5.7. The Company’s finance lease assets and liabilities, which are disclosed in Note 11 “Leases”, remain largely unchanged under the lease accounting standard. The standard did not have a material impact on the Company’s results of operations or liquidity. The guidance did not have a material impact on its debt covenant compliance.

Measurement of Credit Losses

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurements of Credit Losses on Financial Instruments, which was amended in May 2019 by ASU No. 2019-04, Codification Improvements to Topic 326, Financial Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments and ASU No. 2019-05, Financial Instruments – Credit Losses (Topic 326): Targeted Transition Relief. These ASUs require entities to account for expected credit losses on financial instruments including trade receivables. The guidance is effective for the Company in the first quarter of fiscal 2021 and early adoption is permitted. The Company is currently evaluating the impact of the updated guidance on its consolidated financial statements.

Fair Value Measurement

In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement which modifies the disclosures on fair value measurements by removing the requirement to disclose the amount and reason for transfers between Level 1 and Level 2 of the fair value hierarchy and the policy for timing of such transfers. The ASU expands the disclosure requirements for Level 3 fair value measurements, primarily focused on changes in unrealized gains and losses included in other comprehensive income. The guidance is effective for the Company in the first quarter of fiscal 2021. Early adoption is permitted for any removed or modified disclosures and adoption of the additional disclosures can be delayed until the effective date. The Company does not currently expect the adoption of ASU 2018-13 to have a material impact on its consolidated financial statements and disclosures.

Simplifying the Accounting for Income Taxes

In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes which simplifies the accounting for income taxes. The ASU removes specified exceptions and adds requirements to simplify the accounting for income taxes. The guidance is effective for the Company in the first quarter of fiscal 2022 and early adoption is permitted. The Company is currently evaluating the impact of the updated guidance on its consolidated financial statements.

Reference Rate Reform

In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting which provides optional expedients and exceptions for the accounting for contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. The guidance is effective for the Company upon issuance through December 31, 2022. The Company is currently evaluating the impact of the updated guidance on its consolidated financial statements.