Summary of Significant Accounting Policies	9 Months Ended
Summary of Significant Accounting Policies	Jun. 30, 2023
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Interim Financial Statements The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with United States generally accepted accounting principles (“U.S. GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all the information and notes required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the three and nine months ended June 30, 2023 are not necessarily indicative of the results that may be expected for the fiscal year ending September 30, 2023. The consolidated balance sheet at September 30, 2022 has been derived from the audited consolidated financial statements at that date but does not include all the information and notes required by U.S. GAAP for complete financial statements. For further information, refer to the consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the fiscal year ended September 30, 2022 (File No. 001-32502). Change in Fiscal Year End On September 29, 2022, the Board of Directors approved a change, effective for the 2023 fiscal year, to the Company’s fiscal year from a modified 52-53-week calendar, in which reporting periods ended on the last Friday of the calendar quarter, to a reporting calendar in which the reporting periods end on the last day of the calendar quarter. Effective for the 2023 fiscal year, the Company’s fiscal year will begin on October 1 and end on September 30 of each year. Prior to the start of the 2023 fiscal year, the Company maintained a 52-53 week fiscal year ending on the last Friday in each reporting period. The fiscal year ended September 30, 2022 included 53 weeks, with the additional week falling in the fiscal quarter ended December 31, 2021. Accordingly, the results of operations for the nine months ended June 30, 2022 reflect 40 weeks, or 280 days, compared to 273 days for the nine months ended June 30, 2023. For the nine months ended June 30, 2022, the revenue benefit of the additional week was approximately $73 million, primarily reflected in Recorded Music streaming revenue. Basis of Consolidation The accompanying financial statements present the consolidated accounts of all entities in which the Company has a controlling voting interest and/or variable interest required to be consolidated in accordance with U.S. GAAP. All intercompany balances and transactions have been eliminated. Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 810, Consolidation (“ASC 810”) requires the Company first evaluate its investments to determine if any investments qualify as a variable interest entity (“VIE”). A VIE is consolidated if the Company is deemed to be the primary beneficiary of the VIE, which is the party involved with the VIE that has both (i) the power to control the most significant activities of the VIE and (ii) either the obligation to absorb losses or the right to receive benefits that could potentially be significant to the VIE. If an entity is not deemed to be a VIE, the Company consolidates the entity if the Company has a controlling voting interest. The Company has performed a review of all subsequent events through the date the financial statements were issued and has determined that no additional disclosures are necessary. Income Taxes The Company uses the estimated annual effective tax rate method in computing its interim tax provision. Certain items, including those deemed to be unusual and infrequent are excluded from the estimated annual effective tax rate. In such cases, the actual tax expense or benefit is reported in the same period as the related item. Certain tax effects are also not reflected in the estimated annual effective tax rate, primarily certain changes in the realizability of deferred tax assets and uncertain tax positions, and are recorded in the period in which the change occurs. Global Intangible Low-Taxed Income (“GILTI”) imposes U.S. taxes on the excess of a deemed return on tangible assets of certain foreign subsidiaries. The Company made an election to recognize GILTI tax in the specific period in which it occurs. New Accounting Pronouncements Recently Adopted Accounting Pronouncements In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting (“ASU 2020-04”). The amendment provides optional expedients and exceptions for applying U.S. GAAP to contracts, hedging relationships and other transactions affected by the discontinuation of the London Interbank Offered Rate (“LIBOR”) or by another reference rate expected to be discontinued because of reference rate reform, if certain criteria are met. In January 2021, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848): Scope, which clarified that certain optional expedients and exceptions in Topic 848 apply to derivative instruments that are affected by the discounting transition due to reference rate reform. In December 2022, the FASB issued ASU 2022-06, Reference Rate Reform (Topic 848): Deferral of the Sunset Date, which extended the period in which Topic 848 may be applied until December 31, 2024. These ASUs were effective upon issuance and may be applied prospectively to contract modifications and hedging relationships entered into or evaluated through December 31, 2024. The Revolving Credit Facility and Senior Term Loan Facility were amended during the nine months ended June 30, 2023 as further described in Note 8. The Company is in the process of evaluating the effect that the adoption of these standards will have on its consolidated financial statements, but does not expect it will have a material effect. Accounting Pronouncements Not Yet Adopted In March 2023, the FASB issued ASU 2023-01, Leases (Topic 842): Common Control Arrangements (“ASU 2023-01”). The amendment clarifies the accounting for leasehold improvements for leases between entities under common control. Specifically, the ASU requires that leasehold improvements associated with common control leases be both: (1) amortized by the lessee over the useful life of the leasehold improvement to the common control group, regardless of the lease term, and (2) accounted for as an adjustment to equity when leasehold improvements are transferred between entities under common control when the lessee no longer controls the leasehold improvements. The amendments in this ASU are effective for fiscal years beginning after December 15, 2023. The Company is in the process of evaluating the effect that the adoption of these standards will have on its consolidated financial statements.