Summary of Significant Accounting Policies (Policies)	6 Months Ended
Summary of Significant Accounting Policies (Policies)	Mar. 31, 2016
Accounting Policies [Abstract]
Interim Financial Statements	Interim Financial Statements The accompanying unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“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 of 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 six month period ended March 31, 2016 are not necessarily indicative of the results that may be expected for the fiscal year ended September 30, 2016. The consolidated balance sheet at September 30, 2015 has been derived from the audited consolidated financial statements at that date but does not include all of 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, 2015 (File No. 001-32502).
Basis of Consolidation	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 maintains a 52-53 week fiscal year ending on the last Friday in each reporting period. As such, all references to March 31, 2016 and March 31, 2015 relate to the periods ended March 25, 2016 and March 27, 2015, respectively. For convenience purposes, the Company continues to date its financial statements as of March 31. The fiscal year ended September 30, 2015 ended on September 25, 2015. For convenience purposes, the Company continues to date its balance sheet as of September 30. 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	Income Taxes At the end of each interim period, the Company makes its best estimate of the effective tax rate expected to be applicable for the full fiscal year and uses that rate to provide for income taxes on a current year-to-date basis before discrete items. If a reliable estimate of the annual effective tax rate cannot be made, which could be caused by the significant variability in rates when marginal earnings are expected for the year, a discrete tax rate is calculated for the period.
New Accounting Pronouncements	New Accounting Pronouncements During the first quarter of fiscal 2016, the Company adopted ASU 2015-17, Balance Sheet Classification of Deferred Taxes (“ASU 2015-17”). ASU 2015-17 requires that deferred tax liabilities and assets be classified as noncurrent in a classified statement of financial position. The Company has elected to adopt this standard retrospectively, and thus the reclassification of prior period balances has been made. The application of ASU 2015-17 to the Company’s September 30, 2015 Consolidated Balance Sheets resulted in a decrease to current deferred tax assets of $52 million, an increase to non-current deferred tax assets of $2 million, and a decrease to non-current deferred tax liabilities of $50 million. In May 2014, the FASB issued guidance codified in ASC 606, Revenue Recognition – Revenue from Contracts with Customers (“ASC 606”), which replaces the guidance in former ASC 605, Revenue Recognition and ASC 928, Entertainment – Music. The amendment was the result of a joint effort by the FASB and the International Accounting Standards Board to improve financial reporting by creating common revenue recognition guidance for U.S. GAAP and international financial reporting standards ("IFRS"). The joint project clarifies the principles for recognizing revenue and develops a common revenue standard for U.S. GAAP and IFRS. ASC 606 is effective for annual periods beginning after December 15, 2017, and interim periods within those years. Early application is not permitted only as of annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting period. The update may be applied using one of two methods: retrospective application to each prior reporting period presented, or retrospective application with the cumulative effect of initially applying the update recognized at the date of initial application. The Company is currently evaluating the transition method that will be elected and the impact of the update on its financial statements and disclosures. In August 2014, the FASB issued ASU 2014-15, Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern (“ASU 2014-15”). This ASU will explicitly require management to assess an entity’s ability to continue as a going concern, and to provide related disclosure when substantial doubt exists. ASU 2014-15 will be effective in the first annual period ending after December 15, 2016, and interim periods thereafter. Earlier adoption is permitted. The adoption of this standard is not expected to have a significant impact on the Company’s financial statements, other than disclosure. In April 2015, the FASB issued ASU 2015-03, Simplifying the Presentation of Debt Issuance Costs (“ASU 2015-03”). This ASU will require that debt issuance costs are presented as a direct deduction to the related debt in the liability section of the balance sheet, rather than presented as an asset. ASU 2015-03 will be effective for annual periods beginning after December 15, 2015, and interim periods within those years. Earlier adoption is permitted. The adoption of this standard is not expected to have a significant impact on the Company’s financial statements, other than presentation. In January 2016, the FASB issued ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities (“ASU 2016-01”). This ASU will require that equity investments are measured at fair value with changes in fair value recognized in net income. The Company may elect to measure equity investments that do not have a readily determinable fair value at cost minus impairment, if any, plus or minus changes resulting from observable price. ASU 2016-01 will be effective for annual periods beginning after December 15, 2017, and interim periods within those years. Earlier adoption is permitted. The adoption of this standard is not expected to have a significant impact on the Company’s financial statements, other than disclosure. In February 2016, the FASB issued ASU 2016-02, Leases (“ASU 2016-02”). This ASU establishes a right-of-use (“ROU”) model that requires a lessee to record a ROU asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the statement of operations. ASU 2016-02 will be effective for annual periods after December 15, 2018, and interim periods within those years. Earlier adoption is permitted. The adoption of this standard is not expected to have a significant impact on the Company’s financial statements, other than presentation. In March 2016, the FASB issued ASU 2016-05, Derivatives and Hedging: Effect of Derivative Contract Novations on Existing Hedge Accounting Relationships (“ASU 2016-05”) and ASU 2016-06, Derivatives and Hedging: Contingent Put and Call Options in Debt Instruments (“ASU 2016-06”). ASU 2016-05 clarifies that a change in the counterparty to a derivative instrument that has been designated as a hedging instrument does not, in and of itself, require dedesignation of that hedging relationship provided that all other hedge accounting criteria continue to be met. ASU 2016-06 clarifies the steps required to determine bifurcation of an embedded derivative. ASU 2016- 05 and ASU 2016-06 are effective for annual periods after December 15, 2016, and interim periods within those years. Early adoption is permitted. The guidance may be adopted prospectively or by a modified retrospective approach. The Company is evaluating the impact of the future adoption of this standard on its financial statements and disclosures. In March 2016, the FASB issued ASU 2016-09, Compensation - Stock Compensation ("ASU 2016-09"). This ASU provides amended guidance which simplifies the accounting for share-based payment transactions involving multiple aspects of the accounting for share-based transactions, including income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. ASU 2016-09 is effective for annual periods after December 15, 2016, and interim periods within those years. Early adoption is permitted. The Company is evaluating the impact of the future adoption of this standard on its financial statements and disclosures.

Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.