Warner Music (WMG) 10-Q 12 Feb 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Dec. 31, 2014	Feb. 12, 2015
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Trading Symbol	wmg
Entity Registrant Name	Warner Music Group Corp.
Entity Central Index Key	1319161
Current Fiscal Year End Date	-21
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		1,055

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Sep. 30, 2014
In Millions, unless otherwise specified
Current assets:
Cash and equivalents	$145	$157
Accounts receivable, net of allowances of $86 million and $65 million	436	383
Inventories	39	39
Royalty advances expected to be recouped within one year	103	102
Deferred tax assets	46	46
Prepaid and other current assets	56	55
Total current assets	825	782
Royalty advances expected to be recouped after one year	190	190
Property, plant and equipment, net	233	227
Goodwill	1,649	1,661
Intangible assets subject to amortization, net	2,755	2,884
Intangible assets not subject to amortization	119	120
Other assets	83	90
Total assets	5,854	5,954
Current liabilities:
Accounts payable	162	215
Accrued royalties	1,146	1,132
Accrued liabilities	250	243
Accrued interest	48	60
Deferred revenue	255	219
Current portion of long-term debt	13	13
Other current liabilities	30	3
Total current liabilities	1,904	1,885
Long-term debt	3,005	3,017
Deferred tax liabilities, net	375	383
Other noncurrent liabilities	256	279
Total liabilities	5,540	5,564
Equity:
Common stock ($0.001 par value; 10,000 shares authorized; 1,055 shares issued and outstanding)
Additional paid-in capital	1,128	1,128
Accumulated deficit	-691	-649
Accumulated other comprehensive loss, net	-142	-108
Total Warner Music Group Corp. equity	295	371
Noncontrolling interest	19	19
Total equity	314	390
Total liabilities and equity	$5,854	$5,954

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Sep. 30, 2014
In Millions, except Share data, unless otherwise specified
Statement Of Financial Position [Abstract]
Accounts receivable, allowances	$86	$65
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	10,000	10,000
Common stock, shares issued	1,055	1,055
Common stock, shares outstanding	1,055	1,055

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Income Statement [Abstract]
Revenues	$829		$815
Costs and expenses:
Cost of revenue	-445		-441
Selling, general and administrative expenses	-296	[1]	-293	[1]
Amortization expense	-65		-66
Total costs and expenses	-806		-800
Operating income	23		15
Interest expense, net	-46		-55
Other expense	-9		-4
Loss before income taxes	-32		-44
Income tax (expense) benefit	-9		8
Net loss	-41		-36
Less: Income attributable to noncontrolling interest	-1		-1
Net loss attributable to Warner Music Group Corp.	($42)		($37)
[1]	(a) Includes depreciation expense of: $(14) $(12)

Consolidated_Statements_of_Ope1

Consolidated Statements of Operations (Parenthetical) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Depreciation expense	($14)	($12)

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Loss (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Statement Of Income And Comprehensive Income [Abstract]
Net loss	($41)		($36)
Other comprehensive loss, net of tax:
Foreign currency adjustment	-34		-8
Other comprehensive loss, net of tax	-34	[1]	-8
Total comprehensive loss	-75		-44
Less: Income attributable to noncontrolling interest	-1		-1
Comprehensive loss attributable to Warner Music Group Corp.	($76)		($45)
[1]	Foreign currency translation adjustments include intra-entity foreign currency transactions that are of a long-term investment nature of $38.9 million

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities
Net loss	($41)	($36)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	79	78
Unrealized gains/losses and remeasurement of foreign denominated loans	14	-20
Deferred income taxes	0	-16
Non-cash interest expense	2	4
Non-cash share-based compensation expense	0	3
Changes in operating assets and liabilities:
Accounts receivable	-67	-56
Inventories	-1	-1
Royalty advances	-7	-35
Accounts payable and accrued liabilities	-47	-79
Royalty payables	46	56
Accrued interest	-12	-17
Deferred revenue	39	60
Other balance sheet changes	30	7
Net cash provided by (used in) operating activities	35	-52
Cash flows from investing activities
Acquisition of music publishing rights, net	-5	-10
Capital expenditures	-24	-12
Investments and acquisitions of businesses, net	-8	-4
Net cash used in investing activities	-37	-26
Cash flows from financing activities
Proceeds from the Revolving Credit Facility	100	155
Repayment of the Revolving Credit Facility	-100	-100
Repayment of Acquisition Corp. Senior Term Loan Facility	-3	0
Distribution to noncontrolling interest holder	0	-1
Net cash (used in) provided by financing activities	-3	54
Effect of exchange rate changes on cash and equivalents	-7	-2
Net decrease in cash and equivalents	-12	-26
Cash and equivalents at beginning of period	157	155
Cash and equivalents at end of period	$145	$129

Consolidated_Statement_of_Equi

Consolidated Statement of Equity (USD $)	Total		Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss	Noncontrolling Interest	Total Warner Music Group Corp. Equity
In Millions, except Share data	USD ($)			USD ($)	USD ($)	USD ($)	USD ($)	USD ($)
Beginning balance at Sep. 30, 2014	$390			$1,128	($649)	($108)	$19	$371
Beginning balance, shares at Sep. 30, 2014	1,055		1,055
Beginning balance, per share value at Sep. 30, 2014	$0.00		0.001
Net (loss) income	-41				-42		1	-42
Other comprehensive loss, net of tax	-34	[1]				-34		-34
Distribution to noncontrolling interest holders	-1						-1
Ending balance at Dec. 31, 2014	$314			$1,128	($691)	($142)	$19	$295
Ending balance, shares at Dec. 31, 2014	1,055		1,055
Ending balance, per share value at Dec. 31, 2014	$0.00		0.001
[1]	Foreign currency translation adjustments include intra-entity foreign currency transactions that are of a long-term investment nature of $38.9 million

Description_of_Business

Description of Business	3 Months Ended
	Dec. 31, 2014
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Description of Business	1. Description of Business
	Warner Music Group Corp. (the “Company”) was formed on November 21, 2003. The Company is the direct parent of WMG Holdings Corp. (“Holdings”), which is the direct parent of WMG Acquisition Corp. (“Acquisition Corp.”). Acquisition Corp. is one of the world’s major music-based content companies.
	Acquisition of Warner Music Group by Access Industries
	Pursuant to an Agreement and Plan of Merger, dated as of May 6, 2011 (the “Merger Agreement”), by and among the Company, AI Entertainment Holdings LLC (formerly Airplanes Music LLC), a Delaware limited liability company (“Parent”) and an affiliate of Access Industries, Inc. (“Access”), and Airplanes Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Parent (“Merger Sub”), on July 20, 2011 (the “Merger Closing Date”) Merger Sub merged with and into the Company with the Company surviving as a wholly owned subsidiary of Parent (the “Merger”). In connection with the Merger, the Company delisted its common stock from the NYSE. The Company continues to file with the SEC current and periodic reports that would be required to be filed with the SEC pursuant to Section 15(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) in accordance with certain covenants contained in the agreements governing its outstanding indebtedness.
	Acquisition of Parlophone Label Group
	On July 1, 2013, the Company completed its acquisition of Parlophone Label Group (the “PLG Acquisition”).
	The Company classifies its business interests into two fundamental operations: Recorded Music and Music Publishing. A brief description of these operations is presented below.
	Recorded Music Operations
	The Company’s Recorded Music business primarily consists of the discovery and development of artists and the related marketing, distribution and licensing of recorded music produced by such artists. The Company plays an integral role in virtually all aspects of the recorded music value chain from discovering and developing talent to producing albums and promoting artists and their products.
	In the United States, Recorded Music operations are conducted principally through the Company’s major record labels—Warner Bros. Records and the Atlantic Records Group. The Company’s Recorded Music operations also include Rhino, a division that specializes in marketing the Company’s music catalog through compilations and reissuances of previously released music and video titles, as well as in the licensing of recordings to and from third parties for various uses, including film and television soundtracks. The Company also conducts its Recorded Music operations through a collection of additional record labels, including, among others, Asylum, Big Beat, East West, Elektra, Erato, Fueled by Ramen, Nonesuch, Parlophone, Reprise, Roadrunner, Rykodisc, Sire, Warner Classics, Warner Music Nashville and Word.
	Outside the United States, Recorded Music activities are conducted in more than 50 countries primarily through various subsidiaries, affiliates and non-affiliated licensees. Internationally, the Company engages in the same activities as in the United States: discovering and signing artists and distributing, marketing and selling their recorded music. In most cases, the Company also markets and distributes the records of those artists for whom the Company’s domestic record labels have international rights. In certain smaller markets, the Company licenses the right to distribute the Company’s records to non-affiliated third-party record labels. The Company’s international artist services operations also include a network of concert promoters through which it provides resources to coordinate tours for the Company’s artists and other artists as well as management companies that partner with artists on other aspects of their career such as merchandising, fan clubs and endorsements, as well as appearances and sponsorship.
	The Company’s Recorded Music distribution operations include Warner-Elektra-Atlantic Corporation (“WEA Corp.”), which markets and sells music and video products to retailers and wholesale distributors; Alternative Distribution Alliance (“ADA”), which distributes the products of independent labels to retail and wholesale distributors; various distribution centers and ventures operated internationally; and an 80% interest in Word, which specializes in the distribution of music products in the Christian retail marketplace.
	In addition to the Company’s Recorded Music products being sold in physical retail outlets, Recorded Music products are also sold in physical form to online physical retailers such as Amazon.com, barnesandnoble.com and bestbuy.com and in digital form to online digital download services such as Apple’s iTunes and Google Play, and are otherwise used by digital streaming services such as Beats Music, Deezer, Rhapsody, Spotify and YouTube, and digital radio services such as Pandora, iTunes Radio and iHeart Radio.
	The Company has integrated the sale of digital content into all aspects of its business, including artist and repertoire (“A&R”), marketing, promotion and distribution. The Company’s business development executives work closely with A&R departments to ensure that while a record is being produced, digital assets are also created with all distribution channels in mind, including streaming services, social networking sites, online portals and music-centered destinations. The Company also works side-by-side with its online and mobile partners to test new concepts. The Company believes existing and new digital businesses will be a significant source of growth for at least the next several years and will provide new opportunities to successfully monetize its assets and create new revenue streams. The proportion of digital revenues attributed to each distribution channel varies by region and proportions may change as the roll out of new technologies continues. As an owner of music content, the Company believes it is well positioned to take advantage of growth in digital distribution and emerging technologies to maximize the value of its assets.
	The Company is also diversifying its revenues beyond its traditional businesses by entering into expanded-rights deals with recording artists in order to partner with artists in other aspects of their careers. Under these agreements, the Company provides services to and participates in artists’ activities outside the traditional recorded music business. The Company builds artist services capabilities and platforms for exploiting this broader set of music-related rights and participating more broadly in the monetization of the artist brands it helps create.
	The Company believes that entering into artist services and expanded-rights deals and enhancing its artist services capabilities will permit it to diversify revenue streams and capitalize on revenue opportunities in merchandising, fan clubs, sponsorship, concert promotion and touring. This will provide for improved long-term relationships with artists and allow the Company to more effectively connect artists and fans.
	Music Publishing Operations
	While recorded music is focused on exploiting a particular recording of a composition, music publishing is an intellectual property business focused on the exploitation of the composition itself. In return for promoting, placing, marketing and administering the creative output of a songwriter, or engaging in those activities for other rightsholders, the Company’s Music Publishing business garners a share of the revenues generated from use of the composition.
	The Company’s Music Publishing operations include Warner/Chappell, its global Music Publishing company, headquartered in Los Angeles with operations in over 50 countries through various subsidiaries, affiliates and non-affiliated licensees. The Company owns or controls rights to more than one million musical compositions, including numerous pop hits, American standards, folk songs and motion picture and theatrical compositions. Assembled over decades, its award-winning catalog includes over 65,000 songwriters and composers and a diverse range of genres including pop, rock, jazz, classical, country, R&B, hip-hop, rap, reggae, Latin, folk, blues, symphonic, soul, Broadway, techno, alternative, gospel and other Christian music. Warner/Chappell also administers the music and soundtracks of several third-party television and film producers and studios, including Lucasfilm, Ltd., Hallmark Entertainment and Disney Music Publishing. Through consistent and tactical talent investment, Warner Chappell has developed a broad array of talent across all genres, resulting in Warner/Chappell being awarded ASCAP’s Top Publisher of the Year for each of Pop, Country and Urban in 2014. The Company’s production music library business includes Non-Stop Music, Groove Addicts Production Music Library, Carlin Recorded Music Library, 615 Music and Frank Gari Productions and Gari Communications, collectively branded as Warner/Chappell Production Music.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	3 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies
	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 month period ended December 31, 2014 are not necessarily indicative of the results that may be expected for the fiscal year ended September 30, 2015.
	The consolidated balance sheet at September 30, 2014 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, 2014 (File No. 001-32502).
	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 December 31, 2014 and December 31, 2013 relate to the three-month periods ended December 26, 2014 and December 27, 2013, respectively. For convenience purposes, the Company continues to date its financial statements as of December 31. The fiscal year ended September 30, 2014 ended on September 26, 2014. 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.
	New Accounting Pronouncements
	During the first quarter of fiscal 2015, the Company adopted Accounting Standards Update (“ASU”) 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (“ASU 2013-11”). ASU 2013-11 requires an unrecognized tax benefit, or a portion of an unrecognized tax benefit, to be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward. The adoption of this standard did not have an impact on the Company’s financial statements, other than presentation.
	During the first quarter of fiscal 2015, the Company adopted ASU 2014-17, Business Combinations (Topic 805): Pushdown Accounting (“ASU 2014-17”). This ASU provides acquired entities the option to apply pushdown accounting in their separate financial statements when an acquirer obtains control of them. ASU 2014-17 was effective upon issuance. This election to apply pushdown accounting is made for each individual change-in-control event. The adoption of this standard did not have an impact on the Company’s financial statements.
	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, 2016, and interim periods within those years. Early application is not permitted. 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.

Comprehensive_Loss

Comprehensive Loss	3 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Comprehensive Loss	3. Comprehensive Loss
	Comprehensive loss, which is reported in the accompanying consolidated statements of equity, consists of net income (loss) and other gains and losses affecting equity that, under U.S. GAAP, are excluded from net income (loss). For the Company, the components of other comprehensive loss primarily consist of foreign currency translation losses and minimum pension liabilities. The following summary sets forth the changes in the components of accumulated other comprehensive loss, net of related taxes:
			Foreign			Minimum			Accumulated
			Currency			Pension			Other
			Translation			Liability			Comprehensive
			Loss			Adjustment			Loss, net
			(in millions)
	Balance at September 30, 2014		$	(98	)	$	(10	)	$	(108	)
	Other comprehensive loss (a)			(34	)		—			(34	)
	Amounts reclassified from accumulated other			—			—			—
	comprehensive income
	Balance at December 31, 2014		$	(132	)	$	(10	)	$	(142	)
	(a)	Foreign currency translation adjustments include intra-entity foreign currency transactions that are of a long-term investment nature of $38.9 million

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets	3 Months Ended
	Dec. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	4. Goodwill and Intangible Assets
	Goodwill
	The following analysis details the changes in goodwill for each reportable segment:
		Recorded				Music
		Music				Publishing				Total
		(in millions)
	Balance at September 30, 2014	$	1,197			$	464			$	1,661
	Acquisitions		2				—				2
	Dispositions		—				—				—
	Other adjustments		(14	)			—				(14	)
	Balance at December 31, 2014	$	1,185			$	464			$	1,649
	Other adjustments during the three months ended December 31, 2014 represent foreign currency movements.
	The Company performs its annual goodwill impairment test in accordance with FASB ASC Topic 350, Intangibles—Goodwill and other (“ASC 350”) during the fourth quarter of each fiscal year as of July 1. The Company may conduct an earlier review if events or circumstances occur that would suggest the carrying value of the Company’s goodwill may not be recoverable. No indicators of impairment were identified during the current period that required the Company to perform an interim assessment or recoverability test.
	Intangible Assets
	Intangible assets consist of the following:
		Weighted
		Average		December 31,				September 30,
		Useful Life		2014				2014
				(in millions)
	Intangible assets subject to amortization:
	Recorded music catalog	11 years		$	1,010			$	1,040
	Music publishing copyrights	27 years			1,527				1,550
	Artist and songwriter contracts	13 years			946				975
	Trademarks	7 years			7				7
	Total gross intangible asset subject to amortization				3,490				3,572
	Accumulated amortization				(735	)			(688	)
	Total net intangible assets subject to amortization				2,755				2,884
	Intangible assets not subject to amortization:
	Trademarks and tradenames	Indefinite			119				120
	Total net other intangible assets			$	2,874			$	3,004

Debt

Debt	3 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Debt	5. Debt
	Debt Capitalization
	Long-term debt, including the current portion, consists of the following:
		December 31,		September 30,
		2014		2014
		(in millions)
	Revolving Credit Facility—Acquisition Corp. (a)	$	—	$	—
	Senior Term Loan Facility due 2020—Acquisition Corp. (b)		1,291		1,294
	5.625% Senior Secured Notes due 2022—Acquisition Corp.		275		275
	6.00% Senior Secured Notes due 2021—Acquisition Corp.		450		450
	6.25% Senior Secured Notes due 2021—Acquisition Corp. (c)		192		201
	6.75% Senior Notes due 2022—Acquisition Corp.		660		660
	13.75% Senior Notes due 2019—Holdings		150		150
	Total debt		3,018		3,030
	Less: current portion		13		13
	Total long-term debt	$	3,005	$	3,017
	(a)	Reflects $150 million of commitments under the Revolving Credit Facility, less letters of credit outstanding of approximately $10 million and $11 million at December 31, 2014 and September 30, 2014, respectively. There were no loans outstanding under the Revolving Credit Facility at December 31, 2014 or September 30, 2014.
	(b)	Principal amount of $1.297 billion and $1.300 billion less unamortized discount of $6 million and $6 million at December 31, 2014 and September 30, 2014, respectively. Of this amount, $13 million, representing the scheduled amortization of the Term Loan, was included in the current portion of long-term debt at December 31, 2014 and September 30, 2014.
	(c)	Face amount of €158 million. Above amounts represent the dollar equivalent of such notes at December 31, 2014 and September 30, 2014.
	Interest Rates
	The loans under the Revolving Credit Facility bear interest at Acquisition Corp.’s election at a rate equal to (i) the rate for deposits in the borrowing currency in the London interbank market (adjusted for maximum reserves) for the applicable interest period (“Revolving LIBOR”), plus 2.00% per annum, or (ii) the base rate, which is the highest of (x) the corporate base rate established by the administrative agent from time to time, (y) 0.50% in excess of the overnight federal funds rate and (z) the one-month Revolving LIBOR plus 1.0% per annum, plus, in each case, 1.00% per annum. If there is a payment default at any time, then the interest rate applicable to overdue principal will be the rate otherwise applicable to such loan plus 2.0% per annum. Default interest will also be payable on other overdue amounts at a rate of 2.0% per annum above the amount that would apply to an alternative base rate loan.
	The loans under the Senior Term Loan Facility bear interest at Acquisition Corp.’s election at a rate equal to (i) the rate for deposits in U.S. dollars in the London interbank market (adjusted for maximum reserves) for the applicable interest period (“Term Loan LIBOR”), plus 2.75% per annum, or (ii) the base rate, which is the highest of (x) the corporate base rate established by the administrative agent as its prime rate in effect at its principal office in New York City from time to time, (y) 0.50% in excess of the overnight federal funds rate and (z) one-month Term Loan LIBOR, plus 1.00% per annum, plus, in each case, 1.75% per annum. The loans under the Senior Term Loan Facility are subject to a Term Loan LIBOR “floor” of 1.00%. If there is a payment default at any time, then the interest rate applicable to overdue principal and interest will be the rate otherwise applicable to such loan plus 2.0% per annum. Default interest will also be payable on other overdue amounts at a rate of 2.0% per annum above the amount that would apply to an alternative base rate loan.
	Amortization and Maturity of Senior Term Loan Facility
	The loans under the Senior Term Loan Facility amortize in equal quarterly installments due December, March, June and September in aggregate annual amounts equal to 1.00% of the original principal amount of the amended Senior Term Loan Facility, or $13 million per year, with the balance payable on maturity date of the Term Loans. The loans outstanding under the Senior Term Loan Facility mature on July 1, 2020.
	Maturity of Revolving Credit Facility
	The maturity date of the Revolving Credit Facility is April 1, 2019.
	Maturities of Senior Notes and Senior Secured Notes
	As of December 31, 2014, there are no scheduled maturities of notes until 2019, when $150 million is scheduled to mature. Thereafter, $1.577 billion is scheduled to mature.
	Interest Expense, net
	Total interest expense, net, was $46 million and $55 million for the three months ended December 31, 2014 and December 31, 2013, respectively. The weighted-average interest rate of the Company’s total debt was 5.6% at December 31, 2014 and 5.6% at September 30, 2014.

Restructuring

Restructuring	3 Months Ended
	Dec. 31, 2014
Restructuring And Related Activities [Abstract]
Restructuring	6. Restructuring
	In conjunction with the PLG Acquisition, the Company undertook a plan to achieve cost savings (the “Restructuring Plan”), primarily through headcount reductions. The Restructuring Plan was approved by the CEO prior to the close of the PLG Acquisition. Under the Restructuring Plan, the Company currently expects to record an aggregate of approximately $77 million in restructuring charges, currently estimated to be made up of employee-related costs of $69 million, real estate costs of $6 million and other costs of $2 million. Total restructuring costs of $1 million related to real estate were incurred in the three months ended December 31, 2014 with respect to these actions. Total restructuring costs of $7 million were incurred in the three months ended December 31, 2013 with respect to these actions, which consisted entirely of employee-related costs. Total restructuring costs to date under the Restructuring Plan are $73 million, including total cash payments of $68 million. The remainder of the Restructuring Plan is expected to be completed by the end of fiscal 2015.
	Total restructuring activity is as follows:
			Employee-			Real
			related Costs			Estate Costs			Other		Total
			(in millions)
	Balance at September 30, 2014		$	12		$	1		$	—	$	13
	Restructuring expense			—			1			—		1
	Cash payments			(8	)		(1	)		—		(9	)
	Balance at December 31, 2014		$	4		$	1		$	—	$	5
	The restructuring accrual is recorded in other current liabilities on the consolidated balance sheet. These balances reflect estimated future cash outlays.
	A summary of the charges in the consolidated statements of operations resulting from the Restructuring Plan is shown below:
			Three Months Ended			Three Months Ended
			December 31,			December 31,
			2014			2013
		(in millions)
	Selling, general and administrative expenses		$	1		$	7
	Total restructuring expense		$	1		$	7
	All of the above expenses were recorded in the Recorded Music reportable segment.

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Dec. 31, 2014
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	7. Commitments and Contingencies
	Pricing of Digital Music Downloads
	On December 20, 2005 and February 3, 2006, the Attorney General of the State of New York served the Company with requests for information in connection with an industry-wide investigation as to the pricing of digital music downloads. On February 28, 2006, the Antitrust Division of the U.S. Department of Justice served us with a Civil Investigative Demand, also seeking information relating to the pricing of digitally downloaded music. Both investigations were ultimately closed, but subsequent to the announcements of the investigations, more than thirty putative class action lawsuits were filed concerning the pricing of digital music downloads. The lawsuits were consolidated in the Southern District of New York. The consolidated amended complaint, filed on April 13, 2007, alleges conspiracy among record companies to delay the release of their content for digital distribution, inflate their pricing of CDs and fix prices for digital downloads. The complaint seeks unspecified compensatory, statutory and treble damages. On October 9, 2008, the District Court issued an order dismissing the case as to all defendants, including us. However, on January 12, 2010, the Second Circuit vacated the judgment of the District Court and remanded the case for further proceedings and on January 10, 2011, the Supreme Court denied the defendants’ petition for Certiorari.
	Upon remand to the District Court, all defendants, including the Company, filed a renewed motion to dismiss challenging, among other things, plaintiffs’ state law claims and standing to bring certain claims. The renewed motion was based mainly on arguments made in defendants’ original motion to dismiss, but not addressed by the District Court. On July 18, 2011, the District Court granted defendants’ motion in part, and denied it in part. Notably, all claims on behalf of the CD-purchaser class were dismissed with prejudice. However, a wide variety of state and federal claims remain for the class of internet download purchasers. Plaintiffs filed an operative consolidated amended complaint on August 31, 2011. Pursuant to the terms of an August 15, 2011 stipulation and order, the case is currently in discovery. Disputes regarding the scope of discovery are ongoing. Plaintiffs filed a Class Certification brief on March 14, 2014. The Company’s reply date has not yet been set. The Company intends to defend against these lawsuits vigorously, but is unable to predict the outcome of these suits. Regardless of the merits of the claims, this and any related litigation could continue to be costly, and divert the time and resources of management. The potential outcomes of these claims that are reasonably possible cannot be determined at this time and an estimate of the reasonably possible loss or range of loss cannot presently be made.
	Music Download Putative Class Action Suits
	Five putative class action lawsuits have been filed against the Company in Federal Court in the Northern District of California between February 2, 2012 and March 10, 2012. The lawsuits, which were brought by various recording artists, all allege that the Company has improperly calculated the royalties due to them for certain digital music sales under the terms of their recording contracts. The named plaintiffs purport to raise these claims on their own behalf and, as a putative class action, on behalf of other similarly situated artists. Plaintiffs base their claims on a previous ruling that held another recorded music company had breached the specific recording contracts at issue in that case through its payment of royalties for music downloads and ringtones. In the wake of that ruling, a number of recording artists have initiated suits seeking similar relief against all of the major record companies, including us. Plaintiffs seek to have the interpretation of the contracts in that prior case applied to their different and separate contracts.
	On April 10, 2012, the Company filed a motion to dismiss various claims in one of the lawsuits, with the intention of filing similar motions in the remaining suits, on the various applicable response dates. Meanwhile, certain plaintiffs’ counsel moved to be appointed as interim lead counsel, and other plaintiffs’ counsel moved to consolidate the various actions. In a June 1, 2012 order, the court consolidated the cases and appointed interim co-lead class counsel. Plaintiffs filed a consolidated, master complaint on August 21, 2012.
	On December 31, 2013, Plaintiffs filed a Motion for Preliminary Approval of Class Action Settlement. On January 23, 2014, the Court granted preliminary approval of the settlement. As part of the settlement, the Company will make available $11.5 million (less attorneys’ fees, costs, and costs of claims administration and class notice) to compensate class members for past sales of downloads and ringtones. Class members had until May 31, 2014 to file claims, opt-out or object to the Class Action Settlement. No class members made perfected objections to the settlement.  Plaintiffs filed their motion for final approval of the Settlement Agreement on November 26, 2014.  On January 12, 2015, the Judge granted final approval of the settlement.  The settlement will become effective on February 25, 2015, after a 30-day appeals period. The Company has recorded what it believes is an appropriate reserve related to these cases, which amount is not material.
	Other Matters
	In addition to the matters discussed above, the Company is involved in various litigation and regulatory proceedings arising in the normal course of business. Where it is determined, in consultation with counsel based on litigation and settlement risks, that a loss is probable and estimable in a given matter, the Company establishes an accrual. In none of the currently pending proceedings is the amount of accrual material. An estimate of the reasonably possible loss or range of loss in excess of the amounts already accrued cannot be made at this time due to various factors typical in contested proceedings, including (1) the results of ongoing discovery; (2) uncertain damage theories and demands; (3) a less than complete factual record; (4) uncertainty concerning legal theories and their resolution by courts or regulators; and (5) the unpredictable nature of the opposing party and its demands. However, the Company cannot predict with certainty the outcome of any litigation or the potential for future litigation. As such, the Company continuously monitors these proceedings as they develop and adjusts any accrual or disclosure as needed. Regardless of the outcome, litigation could have an adverse impact on the Company, including the Company’s brand value, because of defense costs, diversion of management resources and other factors and it could have a material effect on the Company’s results of operations for a given reporting period.

Segment_Information

Segment Information	3 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Segment Information	8. Segment Information
	As discussed more fully in Note 1, based on the nature of its products and services, the Company classifies its business interests into two fundamental operations: Recorded Music and Music Publishing, which also represent the reportable segments of the Company. Information as to each of these operations is set forth below. The Company evaluates performance based on several factors, of which the primary financial measure is operating income (loss) before non-cash depreciation of tangible assets and non-cash amortization of intangible assets (“OIBDA”). The Company has supplemented its analysis of OIBDA results by segment with an analysis of operating income (loss) by segment.
	The accounting policies of the Company’s business segments are the same as those described in the summary of significant accounting policies included elsewhere herein. The Company accounts for intersegment sales at fair value as if the sales were to third parties. While intercompany transactions are treated like third-party transactions to determine segment performance, the revenues (and corresponding expenses recognized by the segment that is counterparty to the transaction) are eliminated in consolidation, and therefore, do not themselves impact consolidated results.
								Corporate
		Recorded			Music			expenses and
		Music			Publishing			eliminations			Total
	Three Months Ended	(in millions)
	31-Dec-14
	Revenues	$	714		$	119		$	(4	)	$	829
	OIBDA		111			17			(26	)		102
	Depreciation of property, plant and equipment		(10	)		(1	)		(3	)		(14	)
	Amortization of intangible assets		(49	)		(16	)		—			(65	)
	Operating income (loss)		52			—			(29	)		23
	31-Dec-13
	Revenues	$	691		$	128		$	(4	)	$	815
	OIBDA		93			19			(19	)		93
	Depreciation of property, plant and equipment		(8	)		(1	)		(3	)		(12	)
	Amortization of intangible assets		(50	)		(16	)		—			(66	)
	Operating income (loss)		35			2			(22	)		15

Additional_Financial_Informati

Additional Financial Information	3 Months Ended
	Dec. 31, 2014
Additional Financial Information [Abstract]
Additional Financial Information	9. Additional Financial Information
	Cash Interest and Taxes
	The Company made interest payments of approximately $56 million and $68 million during the three months ended December 31, 2014 and December 31, 2013, respectively. The Company paid cash taxes of $8 million offset by a refund of $9 million in Germany for the three months ended December 31, 2014 as compared to taxes paid of $3 million, net of refunds, for the three months ended December 31, 2013.

Fair_Value_Measurements

Fair Value Measurements	3 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value Measurements	10. Fair Value Measurements
	ASC 820 defines fair value as the price that would be received upon sale of an asset or paid upon transfer of a liability in an orderly transaction between market participants at the measurement date and in the principal or most advantageous market for that asset or liability. The fair value should be calculated based on assumptions that market participants would use in pricing the asset or liability, not on assumptions specific to the entity.
	In addition to defining fair value, ASC 820 expands the disclosure requirements around fair value and establishes a fair value hierarchy for valuation inputs. The hierarchy prioritizes the inputs into three levels based on the extent to which inputs used in measuring fair value are observable in the market. Each fair value measurement is reported in one of the three levels which is determined by the lowest level input that is significant to the fair value measurement in its entirety. These levels are:
	—	Level 1—inputs are based upon unadjusted quoted prices for identical instruments traded in active markets.
	—	Level 2—inputs are based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active and model-based valuation techniques for which all significant assumptions are observable in the market or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
	—	Level 3—inputs are generally unobservable and typically reflect management’s estimates of assumptions that market participants would use in pricing the asset or liability. The fair values are therefore determined using model-based techniques that include option pricing models, discounted cash flow models and similar techniques.
	In accordance with the fair value hierarchy, described above, the following table shows the fair value of the Company’s financial instruments that are required to be measured at fair value as of December 31, 2014 and September 30, 2014.
			Fair Value Measurements as of  December 31, 2014
			(Level 1)			(Level 2)		(Level 3)			Total
			(in millions)
	Other Current Liabilities:
	Contractual Obligations (a)			—			—		(2	)		(2	)
	Other Non-Current Liabilities:
	Contractual Obligations (a)			—			—		(1	)		(1	)
	Total		$	—		$	—	$	(3	)	$	(3	)
			Fair Value Measurements as of  September 30, 2014
			(Level 1)			(Level 2)		(Level 3)			Total
			(in millions)
	Other Current Liabilities:
	Contractual Obligations (a)			—			—		(2	)		(2	)
	Other Non-Current Liabilities:
	Contractual Obligations (a)			—			—		(1	)		(1	)
	Total		$	—		$	—	$	(3	)	$	(3	)
	(a)	This represents purchase obligations and contingent consideration related to the Company’s various acquisitions. This is based on a discounted cash flow approach and it is adjusted to fair value on a recurring basis and any adjustments are included as a component of operating income in the statement of operations. These amounts were mainly calculated using unobservable inputs such as future earnings performance of the Company’s various acquisitions and the expected timing of the payment.
	The following table reconciles the beginning and ending balances of net assets and liabilities classified as Level 3:
			Total
			(in millions)
	Balance at September 30, 2014		$	(3	)
	Additions			—
	Reductions			—
	Payments			—
	Balance at December 31, 2014		$	(3	)
	The majority of the Company’s non-financial instruments, which include goodwill, intangible assets, inventories, and property, plant, and equipment, are not required to be re-measured to fair value on a recurring basis. These assets are evaluated for impairment if certain triggering events occur. If such evaluation indicates that impairment exists, the asset is written down to its fair value. In addition, an impairment analysis is performed at least annually for goodwill and indefinite-lived intangible assets.
	Fair Value of Debt
	Based on the level of interest rates prevailing at December 31, 2014, the fair value of the Company’s debt was $2.890 billion. Based on the level of interest rates prevailing at September 30, 2014, the fair value of the Company’s debt was $3.026 billion. The fair value of the Company’s debt instruments are determined using quoted market prices from less active markets or by using quoted market prices for instruments with identical terms and maturities; both approaches are considered a Level 2 measurement.

Guarantor_and_NonGuarantor_Sub

Guarantor and Non-Guarantor Subsidiaries Financial Information	3 Months Ended
	Dec. 31, 2014
Condensed Financial Information Of Parent Company Only Disclosure [Abstract]
Guarantor and Non-Guarantor Subsidiaries Financial Information	WARNER MUSIC GROUP CORP.
	Supplementary Information
	Consolidating Financial Statements
	The Company is the direct parent of Holdings, which is the direct parent of Acquisition Corp. Holdings has issued and outstanding the 13.75% Senior Notes due 2019 (the “Holdings Notes”). In addition, Acquisition Corp. has issued and outstanding the 5.625% Senior Secured Notes due 2022, the 6.00% Senior Secured Notes due 2021, the 6.25% Senior Secured Notes due 2021, and the 6.75% Senior Notes due 2022 (together, the “Acquisition Corp. Notes”).
	The Holdings Notes are guaranteed by the Company. These guarantees are full, unconditional, joint and several. The following condensed consolidating financial statements are presented for the information of the holders of the Holdings Notes and present the results of operations, financial position and cash flows of (i) the Company, which is the guarantor of the Holdings Notes, (ii) Holdings, which is the issuer of the Holdings Notes, (iii) the subsidiaries of Holdings (Acquisition Corp. is the only direct subsidiary of Holdings) and (iv) the eliminations necessary to arrive at the information for the Company on a consolidated basis. Investments in consolidated or combined subsidiaries are presented under the equity method of accounting.
	The Acquisition Corp. Notes are also guaranteed by the Company and, in addition, are guaranteed by all of Acquisition Corp.’s domestic wholly-owned subsidiaries. The secured notes are guaranteed on a senior secured basis and the unsecured notes are guaranteed on an unsecured senior basis. The Company’s guarantee of the Acquisition Corp. Notes is full and unconditional.  The guarantee of the Acquisition Corp. Notes by Acquisition Corp.’s domestic, wholly-owned subsidiaries are full, unconditional, joint and several. The following condensed consolidating financial statements are also presented for the information of the holders of the Acquisition Corp. Notes and present the results of operations, financial position and cash flows of (i) Acquisition Corp., which is the issuer of the Acquisition Corp. Notes, (ii) the guarantor subsidiaries of Acquisition Corp., (iii) the non-guarantor subsidiaries of Acquisition Corp. and (iv) the eliminations necessary to arrive at the information for Acquisition Corp. on a consolidated basis. Investments in consolidated subsidiaries are presented under the equity method of accounting. There are no restrictions on Acquisition Corp.’s ability to obtain funds from any of its wholly-owned subsidiaries through dividends, loans or advances.
	The Company and Holdings are holding companies that conduct substantially all of their business operations through Acquisition Corp. Accordingly, the ability of the Company and Holdings to obtain funds from their subsidiaries is restricted by the indentures for the Acquisition Corp. Notes and the credit agreements for the Acquisition Corp. Senior Credit Facilities, and, with respect to the Company, the indenture for the Holdings Notes.
	The Company has revised its presentation for the prior period Guarantor and Non-Guarantor Financial Information from what was filed in our Form 10-Q on February 6, 2014. The Company uses the guidance under ASC Subtopic 605-45, Principal Agent Considerations, to determine when to measure revenue on a “gross” or “net” basis depending on whether the Company is acting as the “principal” in the transaction or acting as an “agent” in the transaction. The revised Consolidating Statement of Operations presentation reflects adjustments to certain revenue and expense balances to properly reflect the impact of one of the Guarantor entities acting as the principal in our digital arrangements. We have also revised the presentation of our Consolidating Balance Sheet to reflect the adjusted investment and equity balances as a result of the changes noted above in the Consolidating Statement of Operations. The principal elimination entries eliminate investments in subsidiaries and intercompany balances.
	Consolidating Balance Sheet
	December 31, 2014
		WMG												WMG			WMG			Warner							Warner
		Acquisition						Non-						Acquisition			Holdings			Music							Music
		Corp.			Guarantor			Guarantor						Corp.			Corp.			Group							Group Corp.
		(issuer)			Subsidiaries			Subsidiaries			Eliminations			Consolidated			(issuer)			Corp.			Eliminations				Consolidated
		(in millions)
	Assets:
	Current assets:
	Cash and equivalents	$	—		$	22		$	123		$	—		$	145		$	—		$	—		$	—			$	145
	Accounts receivable, net		—			137			299			—			436			—			—			—				436
	Inventories		—			12			27			—			39			—			—			—				39
	Royalty advances expected to be recouped within one year		—			61			42			—			103			—			—			—				103
	Deferred tax assets		—			21			25			—			46			—			—			—				46
	Prepaid and other current assets		5			7			44			—			56			—			—			—				56
	Total current assets		5			260			560			—			825			—			—			—				825
	Due (to) from parent companies		998			(347	)		(651	)		—			—			—			—			—				—
	Investments in and advances to (from) consolidated subsidiaries		2,319			1,303			—			(3,622	)		—			444			295			(739	)			—
	Royalty advances expected to be recouped after one year		—			113			77			—			190			—			—			—				190
	Property, plant and equipment, net		—			151			82			—			233			—			—			—				233
	Goodwill		—			1,378			271			—			1,649			—			—			—				1,649
	Intangible assets subject to amortization, net		—			1,352			1,403			—			2,755			—			—			—				2,755
	Intangible assets not subject to amortization		—			71			48			—			119			—			—			—				119
	Other assets		44			14			19			—			77			6			—			—				83
	Total assets	$	3,366		$	4,295		$	1,809		$	(3,622	)	$	5,848		$	450		$	295		$	(739	)		$	5,854
	Liabilities and Deficit:
	Current liabilities:
	Accounts payable	$	—		$	75		$	87		$	—		$	162		$	—		$	—		$	—			$	162
	Accrued royalties		—			494			652			—			1,146			—			—			—				1,146
	Accrued liabilities		—			75			175			—			250			—			—			—				250
	Accrued interest		43			—			—			—			43			5			—			—				48
	Deferred revenue		—			186			69			—			255			—			—			—				255
	Current portion of long-term debt		13			—			—			—			13			—			—			—				13
	Other current liabilities		8			1			21			—			30			—			—			—				30
	Total current liabilities		64			831			1,004			—			1,899			5			—			—				1,904
	Long-term debt		2,855			—			—			—			2,855			150			—			—				3,005
	Deferred tax liabilities, net		—			128			247			—			375			—			—			—				375
	Other noncurrent liabilities		3			120			133			—			256			—			—			—				256
	Total liabilities		2,922			1,079			1,384			—			5,385			155			—			—				5,540
	Total Warner Music Group Corp. equity (deficit)		444			3,215			407			(3,622	)		444			295			295			(739	)			295
	Noncontrolling interest		—			1			18			—			19			—			—			—				19
	Total equity (deficit)		444			3,216			425			(3,622	)		463			295			295			(739	)			314
	Total liabilities and equity (deficit)	$	3,366		$	4,295		$	1,809		$	(3,622	)	$	5,848		$	450		$	295		$	(739	)		$	5,854
	Consolidating Balance Sheet
	September 30, 2014
		WMG												WMG			WMG			Warner							Warner
		Acquisition						Non-						Acquisition			Holdings			Music							Music
		Corp.			Guarantor			Guarantor						Corp.			Corp.			Group							Group Corp.
		(issuer)			Subsidiaries			Subsidiaries			Eliminations			Consolidated			(issuer)			Corp.			Eliminations				Consolidated
		(in millions)
	Assets:
	Current assets:
	Cash and equivalents	$	—		$	26		$	131		$	—		$	157		$	—		$	—		$	—			$	157
	Accounts receivable, net		—			174			209			—			383			—			—			—				383
	Inventories		—			13			26			—			39			—			—			—				39
	Royalty advances expected to be recouped within one year		—			62			40			—			102			—			—			—				102
Deferred tax assets		—			21			25			—			46			—			—			—				46
Prepaid and other current assets		5			10			40			—			55			—			—			—				55
Total current assets		5			306			471			—			782			—			—			—				782
Due (to) from parent companies		924			(242	)		(682	)		—			—			—			—			—				—
Investments in and advances to (from) consolidated subsidiaries		2,531			1,142			—			(3,673	)		—			525			371			(896	)			—
Royalty advances expected to be recouped after one year		—			115			75			—			190			—			—			—				190
Property, plant and equipment, net		—			143			84			—			227			—			—			—				227
Goodwill		—			1,379			282			—			1,661			—			—			—				1,661
Intangible assets subject to amortization, net		—			1,372			1,512			—			2,884			—			—			—				2,884
Intangible assets not subject to amortization		—			75			45			—			120			—			—			—				120
Other assets		46			10			28			—			84			6			—			—				90
Total assets	$	3,506		$	4,300		$	1,815		$	(3,673	)	$	5,948		$	531		$	371		$	(896	)		$	5,954
Liabilities and Deficit:
Current liabilities:
Accounts payable	$	38		$	91		$	86		$	—		$	215		$	—		$	—		$	—			$	215
Accrued royalties		—			531			601			—			1,132			—			—			—				1,132
Accrued liabilities		—			64			179			—			243			—			—			—				243
Accrued interest		50			—			—			—			50			10			—			—				60
Deferred revenue		—			167			52			—			219			—			—			—				219
Current portion of long-term debt		13			—			—			—			13			—			—			—				13
Other current liabilities		—			1			2			—			3			—			—			—				3
Total current liabilities		101			854			920			—			1,875			10			—			—				1,885
Long-term debt		2,867			—			—			—			2,867			150			—			—				3,017
Deferred tax liabilities, net		—			128			255			—			383			—			—			—				383
Other noncurrent liabilities		13			124			142			—			279			—			—			—				279
Total liabilities		2,981			1,106			1,317			—			5,404			160			—			—				5,564
Total Warner Music Group Corp. equity (deficit)		525			3,192			481			(3,673	)		525			371			371			(896	)			371
Noncontrolling interest		—			2			17			—			19			—			—			—				19
Total equity (deficit)		525			3,194			498			(3,673	)		544			371			371			(896	)			390
Total liabilities and equity (deficit)	$	3,506		$	4,300		$	1,815		$	(3,673	)	$	5,948		$	531		$	371		$	(896	)		$	5,954
Consolidating Statement of Operations
For The Three Months Ended December 31, 2014
	WMG												WMG			WMG			Warner							Warner
	Acquisition						Non-						Acquisition			Holdings			Music							Music
	Corp.			Guarantor			Guarantor						Corp.			Corp.			Group							Group Corp.
	(issuer)			Subsidiaries			Subsidiaries			Eliminations			Consolidated			(issuer)			Corp.			Eliminations				Consolidated
	(in millions)
Revenues	$	—		$	361		$	513		$	(45	)	$	829		$	—		$	—		$	—			$	829
Costs and expenses:
Cost of revenue		—			(167	)		(318	)		40			(445	)		—			—			—				(445	)
Selling, general and administrative expenses		1			(133	)		(169	)		5			(296	)		—			—			—				(296	)
Amortization of intangible assets		—			(30	)		(35	)		—			(65	)		—			—			—				(65	)
Total costs and expenses		1			(330	)		(522	)		45			(806	)		—			—			—				(806	)
Operating (loss) income		1			31			(9	)		—			23			—			—			—				23
Interest income (expense), net		(21	)		2			(22	)		—			(41	)		(5	)		—			—				(46	)
Equity gains (losses) from consolidated subsidiaries		(6	)		(2	)		—			8			—			(37	)		(42	)		79				—
Other income (expense), net		(2	)		—			(7	)		—			(9	)		—			—			—				(9	)
Income (loss) before income taxes		(28	)		31			(38	)		8			(27	)		(42	)		(42	)		79				(32	)
Income tax benefit (expense)		(9	)		(8	)		(1	)		9			(9	)		—			—			—				(9	)
Net income (loss)		(37	)		23			(39	)		17			(36	)		(42	)		(42	)		79				(41	)
Less: income attributable to noncontrolling interest		—			—			(1	)		—			(1	)		—			—			—				(1	)
Net income (loss) attributable to Warner Music Group Corp.	$	(37	)	$	23		$	(40	)	$	17		$	(37	)	$	(42	)	$	(42	)	$	79			$	(42	)
Consolidating Statement of Operations
For The Three Months Ended December 31, 2013
	WMG												WMG			WMG			Warner							Warner
	Acquisition						Non-						Acquisition			Holdings			Music							Music
	Corp.			Guarantor			Guarantor						Corp.			Corp.			Group							Group Corp.
	(issuer)			Subsidiaries			Subsidiaries			Eliminations			Consolidated			(issuer)			Corp.			Eliminations				Consolidated
	(in millions)
Revenues	$	—		$	356		$	511		$	(52	)	$	815		$	—		$	—		$	—			$	815
Costs and expenses:
Cost of revenue	$	—		$	(155	)	$	(335	)	$	49		$	(441	)	$	—		$	—		$	—			$	(441	)
Selling, general and administrative expenses		—			(115	)		(181	)		3			(293	)		—			—			—				(293	)
Amortization of intangible assets		—			(30	)		(36	)		—			(66	)		—			—			—				(66	)
Total costs and expenses		—			(300	)		(552	)		52			(800	)		—			—			—				(800	)
Operating income (loss)		—			56			(41	)		—			15			—			—			—				15
Interest income (expense), net		(31	)		1			(20	)		—			(50	)		(5	)		—			—				(55	)
Equity gains (losses) from consolidated subsidiaries		(21	)		5			—			16			—			(32	)		(37	)		69				—
Other income (expense), net		12			(14	)		(2	)		—			(4	)		—			—			—				(4	)
Income (loss) before income taxes		(40	)		48			(63	)		16			(39	)		(37	)		(37	)		69				(44	)
Income tax benefit (expense)		8			(4	)		7			(3	)		8			—			—			—				8
Net income (loss)		(32	)		44			(56	)		13			(31	)		(37	)		(37	)		69				(36	)
Less: income attributable to noncontrolling interest		—			—			(1	)		—			(1	)		—			—			—				(1	)
Net income (loss) attributable to Warner Music Group Corp.	$	(32	)	$	44		$	(57	)	$	13		$	(32	)	$	(37	)	$	(37	)	$	69			$	(37	)
Consolidating Statement of Comprehensive Income
For The Three Months Ended December 31, 2014
	WMG												WMG			WMG			Warner							Warner
	Acquisition						Non-						Acquisition			Holdings			Music							Music
	Corp.			Guarantor			Guarantor						Corp.			Corp.			Group							Group Corp.
	(issuer)			Subsidiaries			Subsidiaries			Eliminations			Consolidated			(issuer)			Corp.			Eliminations				Consolidated
	(in millions)
Net (loss) income	$	(37	)	$	23		$	(39	)	$	17		$	(36	)	$	(42	)	$	(42	)	$	79			$	(41	)
Other comprehensive income (loss), net of tax:
Foreign currency adjustment		(34	)		—			(34	)		34			(34	)		(34	)		(34	)		68				(34	)
Other comprehensive income (loss), net of tax:		(34	)		—			(34	)		34			(34	)		(34	)		(34	)		68				(34	)
Total comprehensive (loss) income		(71	)		23			(73	)		51			(70	)		(76	)		(76	)		147				(75	)
Less: income attributable to noncontrolling interest		—			—			(1	)		—			(1	)		—			—			—				(1	)
Comprehensive (loss) income attributable to Warner Music Group	$	(71	)	$	23		$	(74	)	$	51		$	(71	)	$	(76	)	$	(76	)	$	147			$	(76	)
Corp.
Consolidating Statement of Comprehensive Income
For The Three Months Ended December 31, 2013
	WMG												WMG			WMG			Warner							Warner
	Acquisition						Non-						Acquisition			Holdings			Music							Music
	Corp.			Guarantor			Guarantor						Corp.			Corp.			Group							Group Corp.
	(issuer)			Subsidiaries			Subsidiaries			Eliminations			Consolidated			(issuer)			Corp.			Eliminations				Consolidated
	(in millions)
Net (loss) income	$	(32	)	$	44		$	(56	)	$	13		$	(31	)	$	(37	)	$	(37	)	$	69			$	(36	)
Other comprehensive income (loss), net of tax:
Foreign currency adjustment		(8	)					(8	)		8			(8	)		(8	)		(8	)		16				(8	)
Other comprehensive income (loss), net of tax:		(8	)		—			(8	)		8			(8	)		(8	)		(8	)		16				(8	)
Total comprehensive (loss) income		(40	)		44			(64	)		21			(39	)		(45	)		(45	)		85				(44	)
Less: income attributable to noncontrolling interest		—			—			(1	)		—			(1	)		—			—			—				(1	)
Comprehensive (loss) income attributable to Warner Music Group	$	(40	)	$	44		$	(65	)	$	21		$	(40	)	$	(45	)	$	(45	)	$	85			$	(45	)
Corp.
Consolidating Statement of Cash Flows
For The Three Months Ended December 31, 2014
	WMG												WMG			WMG			Warner							Warner
	Acquisition						Non-						Acquisition			Holdings			Music							Music
	Corp.			Guarantor			Guarantor						Corp.			Corp.			Group							Group Corp.
	(issuer)			Subsidiaries			Subsidiaries			Eliminations			Consolidated			(issuer)			Corp.			Eliminations				Consolidated
	(in millions)
Cash flows from operating activities
Net (loss) income	$	(37	)	$	23		$	(39	)	$	17		$	(36	)	$	(42	)	$	(42	)	$	79			$	(41	)
Adjustments to reconcile net (loss) income to net cash provided by
operating activities:
Depreciation and amortization		—			41			38			—			79			—			—			—				79
Unrealized gains/losses and remeasurement of foreign denominated loans		(9	)		—			23			—			14			—			—			—				14
Deferred income taxes		—			—			—			—			—			—			—			—				—
Non-cash interest expense		2			—			—			—			2			—			—			—				2
Non-cash share-based compensation expense		—			—			—			—			—			—			—			—				—
Equity losses (gains), including distributions		6			2			—			(8	)		—			37			42			(79	)			—
Changes in operating assets and liabilities:		—			—			—			—			—			—			—			—				—
Accounts receivable		—			38			(105	)		—			(67	)		—			—			—				(67	)
Inventories		—			1			(2	)		—			(1	)		—			—			—				(1	)
Royalty advances		—			2			(9	)		—			(7	)		—			—			—				(7	)
Accounts payable and accrued liabilities		—			(10	)		(37	)		—			(47	)		—			—			—				(47	)
Royalty payables		—			(37	)		83			—			46			—			—			—				46
Accrued interest		(7	)		—			—			—			(7	)		(5	)		—			—				(12	)
Deferred revenue		—			19			20			—			39			—			—			—				39
Other balance sheet changes		(1	)		4			36			(9	)		30			—			—			—				30
Net cash provided by (used in) operating activities		(46	)		83			8			—			45			(10	)		—			—				35
Cash flows from investing activities
Acquisition of music publishing rights, net		—			(4	)		(1	)		—			(5	)		—			—			—				(5	)
Capital expenditures		—			(18	)		(6	)		—			(24	)		—			—			—				(24	)
Investments and acquisitions of businesses, net		—			(6	)		(2	)		—			(8	)		—			—			—				(8	)
Advances to issuer		59			—			—			(59	)		—			—			—			—				—
Net cash provided by (used in) investing activities		59			(28	)		(9	)		(59	)		(37	)		—			—			—				(37	)
Cash flows from financing activities
Dividend by Acquisition Corp. to Holdings Corp.		(10	)		—			—			—			(10	)		10			—			—				—
Proceeds from the Revolving Credit Facility		100			—			—			—			100			—			—			—				100
Repayment of the Revolving Credit Facility		(100	)		—			—			—			(100	)		—			—			—				(100	)
Repayment of Acquisition Corp. Senior Term Loan Facility		(3	)		—			—			—			(3	)		—			—			—				(3	)
Distribution to noncontrolling interest holder		—			—			—			—			—			—			—			—				—
Change in due to (from) issuer		—			(59	)		—			59			—			—			—			—				—
Net cash provided by (used in) financing activities		(13	)		(59	)		—			59			(13	)		10			—			—				(3	)
Effect of exchange rate changes on cash and equivalents		—			—			(7	)		—			(7	)		—			—			—				(7	)
Net increase (decrease) in cash and equivalents		—			(4	)		(8	)		—			(12	)		—			—			—				(12	)
Cash and equivalents at beginning of period		—			26			131			—			157			—			—			—				157
Cash and equivalents at end of period	$	—		$	22		$	123		$	—		$	145		$	—		$	—		$	—			$	145
Consolidating Statement of Cash Flows
For The Three Months Ended December 31, 2013
	WMG																	WMG					WMG						Warner						Warner
	Acquisition						Non-											Acquisition					Holdings						Music						Music
	Corp.			Guarantor			Guarantor											Corp.					Corp.						Group						Group Corp.
	(issuer)			Subsidiaries			Subsidiaries					Eliminations						Consolidated					(issuer)						Corp.			Eliminations			Consolidated
	(in millions)
Cash flows from operating activities
Net (loss) income	$	(32	)	$	44		$	(56	)			$	13					$	(31	)			$		(37	)			$	(37	)	$	69		$	(36	)
Adjustments to reconcile net (loss) income to net cash provided by
operating activities:
Depreciation and amortization		—			38			40					—						78						—					—			—			78
Unrealized gains/losses and remeasurement of foreign denominated loans		3			(8	)		(15	)				—						(20	)					—					—			—			(20	)
Deferred income taxes		—			—			(16	)				—						(16	)					—					—			—			(16	)
Non-cash interest expense		4			—			—					—						4						—					—			—			4
Non-cash share-based compensation expense		—			3			—					—						3						—					—			—			3
Equity losses (gains), including distributions		21			(5	)		—					(16		)				—						32					37			(69	)		—
Changes in operating assets and liabilities:
Accounts receivable		—			2			(58	)				—						(56	)					—					—			—			(56	)
Inventories		—			1			(2	)				—						(1	)					—					—			—			(1	)
Royalty advances		—			2			(37	)				—						(35	)					—					—			—			(35	)
Accounts payable and accrued liabilities		—			(109	)		51					(21		)				(79	)					—					—			—			(79	)
Royalty payables		—			(56	)		112					—						56						—					—			—			56
Accrued interest		(12	)		—			—					—						(12	)					(5	)				—			—			(17	)
Deferred revenue		—			60			—					—						60						—					—			—			60
Other balance sheet changes		—			9			(26	)				24						7						—					—			—			7
Net cash provided by (used in) operating activities		(16	)		(19	)		(7	)				—						(42	)					(10	)				—			—			(52	)
Cash flows from investing activities
Acquisition of music publishing rights, net		—			(6	)		(4	)				—						(10	)					—					—			—			(10	)
Capital expenditures		—			(9	)		(3	)				—						(12	)					—					—			—			(12	)
Investments and acquisitions of businesses, net		-			(1	)		(3	)				—						(4	)					—					—			—			(4	)
Advances to issuer		(29	)		—			—					29						—						—					—			—			—
Net cash provided by (used in) investing activities		(29	)		(16	)		(10	)				29						(26	)					—					—			—			(26	)
Cash flows from financing activities
Dividend by Acquisition Corp. to Holdings Corp.		(10	)		—			—					—						(10	)					10					—			—			—
Proceeds from the Revolving Credit Facility		155			—			—					—						155						—					—			—			155
Repayment of the Revolving Credit Facility		(100	)		—			—					—						(100	)					—					—			—			(100	)
Distribution to noncontrolling interest holder		—			—			(1	)				—						(1	)					—					—			—			(1	)
Change in due to (from) issuer		—			29			—					(29		)				—						—					—			—			—
Net cash provided by (used in) financing activities		45			29			(1	)				(29		)				44						10					—			—			54
Effect of exchange rate changes on cash and equivalents		—			—			(2	)				—						(2	)					—					—			—			(2	)
Net increase (decrease) in cash and equivalents		—			(6	)		(20	)				—						(26	)					—					—			—			(26	)
Cash and equivalents at beginning of period		—			16			139					—						155						—					—			—			155
Cash and equivalents at end of period	$	—		$	10		$	119				$	—					$	129				$		—				$	—		$	—		$	129

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Dec. 31, 2014
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 month period ended December 31, 2014 are not necessarily indicative of the results that may be expected for the fiscal year ended September 30, 2015.
	The consolidated balance sheet at September 30, 2014 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, 2014 (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 December 31, 2014 and December 31, 2013 relate to the three-month periods ended December 26, 2014 and December 27, 2013, respectively. For convenience purposes, the Company continues to date its financial statements as of December 31. The fiscal year ended September 30, 2014 ended on September 26, 2014. 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.
New Accounting Pronouncements	New Accounting Pronouncements
	During the first quarter of fiscal 2015, the Company adopted Accounting Standards Update (“ASU”) 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (“ASU 2013-11”). ASU 2013-11 requires an unrecognized tax benefit, or a portion of an unrecognized tax benefit, to be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward. The adoption of this standard did not have an impact on the Company’s financial statements, other than presentation.
	During the first quarter of fiscal 2015, the Company adopted ASU 2014-17, Business Combinations (Topic 805): Pushdown Accounting (“ASU 2014-17”). This ASU provides acquired entities the option to apply pushdown accounting in their separate financial statements when an acquirer obtains control of them. ASU 2014-17 was effective upon issuance. This election to apply pushdown accounting is made for each individual change-in-control event. The adoption of this standard did not have an impact on the Company’s financial statements.
	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, 2016, and interim periods within those years. Early application is not permitted. 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.

Comprehensive_Loss_Tables

Comprehensive Loss (Tables)	3 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Loss	Comprehensive loss, which is reported in the accompanying consolidated statements of equity, consists of net income (loss) and other gains and losses affecting equity that, under U.S. GAAP, are excluded from net income (loss). For the Company, the components of other comprehensive loss primarily consist of foreign currency translation losses and minimum pension liabilities. The following summary sets forth the changes in the components of accumulated other comprehensive loss, net of related taxes:
			Foreign			Minimum			Accumulated
			Currency			Pension			Other
			Translation			Liability			Comprehensive
			Loss			Adjustment			Loss, net
			(in millions)
	Balance at September 30, 2014		$	(98	)	$	(10	)	$	(108	)
	Other comprehensive loss (a)			(34	)		—			(34	)
	Amounts reclassified from accumulated other			—			—			—
	comprehensive income
	Balance at December 31, 2014		$	(132	)	$	(10	)	$	(142	)
	(a)	Foreign currency translation adjustments include intra-entity foreign currency transactions that are of a long-term investment nature of $38.9 million

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	3 Months Ended
	Dec. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]
Changes in Goodwill for Each Reportable Segment	The following analysis details the changes in goodwill for each reportable segment:
		Recorded				Music
		Music				Publishing				Total
		(in millions)
	Balance at September 30, 2014	$	1,197			$	464			$	1,661
	Acquisitions		2				—				2
	Dispositions		—				—				—
	Other adjustments		(14	)			—				(14	)
	Balance at December 31, 2014	$	1,185			$	464			$	1,649
Schedule of Intangible Assets	Intangible assets consist of the following:
		Weighted
		Average		December 31,				September 30,
		Useful Life		2014				2014
				(in millions)
	Intangible assets subject to amortization:
	Recorded music catalog	11 years		$	1,010			$	1,040
	Music publishing copyrights	27 years			1,527				1,550
	Artist and songwriter contracts	13 years			946				975
	Trademarks	7 years			7				7
	Total gross intangible asset subject to amortization				3,490				3,572
	Accumulated amortization				(735	)			(688	)
	Total net intangible assets subject to amortization				2,755				2,884
	Intangible assets not subject to amortization:
	Trademarks and tradenames	Indefinite			119				120
	Total net other intangible assets			$	2,874			$	3,004

Debt_Tables

Debt (Tables)	3 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Long-term Debt	Long-term debt, including the current portion, consists of the following:
		December 31,		September 30,
		2014		2014
		(in millions)
	Revolving Credit Facility—Acquisition Corp. (a)	$	—	$	—
	Senior Term Loan Facility due 2020—Acquisition Corp. (b)		1,291		1,294
	5.625% Senior Secured Notes due 2022—Acquisition Corp.		275		275
	6.00% Senior Secured Notes due 2021—Acquisition Corp.		450		450
	6.25% Senior Secured Notes due 2021—Acquisition Corp. (c)		192		201
	6.75% Senior Notes due 2022—Acquisition Corp.		660		660
	13.75% Senior Notes due 2019—Holdings		150		150
	Total debt		3,018		3,030
	Less: current portion		13		13
	Total long-term debt	$	3,005	$	3,017
	(a)	Reflects $150 million of commitments under the Revolving Credit Facility, less letters of credit outstanding of approximately $10 million and $11 million at December 31, 2014 and September 30, 2014, respectively. There were no loans outstanding under the Revolving Credit Facility at December 31, 2014 or September 30, 2014.
	(b)	Principal amount of $1.297 billion and $1.300 billion less unamortized discount of $6 million and $6 million at December 31, 2014 and September 30, 2014, respectively. Of this amount, $13 million, representing the scheduled amortization of the Term Loan, was included in the current portion of long-term debt at December 31, 2014 and September 30, 2014.
	(c)	Face amount of €158 million. Above amounts represent the dollar equivalent of such notes at December 31, 2014 and September 30, 2014.

Restructuring_Tables

Restructuring (Tables)	3 Months Ended
	Dec. 31, 2014
Restructuring Cost And Reserve [Line Items]
Summary of Charges in Consolidated Statement of Operations	Total restructuring activity is as follows:
			Employee-			Real
			related Costs			Estate Costs			Other		Total
			(in millions)
	Balance at September 30, 2014		$	12		$	1		$	—	$	13
	Restructuring expense			—			1			—		1
	Cash payments			(8	)		(1	)		—		(9	)
	Balance at December 31, 2014		$	4		$	1		$	—	$	5
Income Statement
Restructuring Cost And Reserve [Line Items]
Summary of Charges in Consolidated Statement of Operations	A summary of the charges in the consolidated statements of operations resulting from the Restructuring Plan is shown below:
			Three Months Ended			Three Months Ended
			December 31,			December 31,
			2014			2013
		(in millions)
	Selling, general and administrative expenses		$	1		$	7
	Total restructuring expense		$	1		$	7

Segment_Information_Tables

Segment Information (Tables)	3 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Schedule of Segment Information	The accounting policies of the Company’s business segments are the same as those described in the summary of significant accounting policies included elsewhere herein. The Company accounts for intersegment sales at fair value as if the sales were to third parties. While intercompany transactions are treated like third-party transactions to determine segment performance, the revenues (and corresponding expenses recognized by the segment that is counterparty to the transaction) are eliminated in consolidation, and therefore, do not themselves impact consolidated results.
								Corporate
		Recorded			Music			expenses and
		Music			Publishing			eliminations			Total
	Three Months Ended	(in millions)
	31-Dec-14
	Revenues	$	714		$	119		$	(4	)	$	829
	OIBDA		111			17			(26	)		102
	Depreciation of property, plant and equipment		(10	)		(1	)		(3	)		(14	)
	Amortization of intangible assets		(49	)		(16	)		—			(65	)
	Operating income (loss)		52			—			(29	)		23
	31-Dec-13
	Revenues	$	691		$	128		$	(4	)	$	815
	OIBDA		93			19			(19	)		93
	Depreciation of property, plant and equipment		(8	)		(1	)		(3	)		(12	)
	Amortization of intangible assets		(50	)		(16	)		—			(66	)
	Operating income (loss)		35			2			(22	)		15

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	3 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Schedule of Fair Value of Financial Instruments	In accordance with the fair value hierarchy, described above, the following table shows the fair value of the Company’s financial instruments that are required to be measured at fair value as of December 31, 2014 and September 30, 2014.
			Fair Value Measurements as of  December 31, 2014
			(Level 1)			(Level 2)		(Level 3)			Total
			(in millions)
	Other Current Liabilities:
	Contractual Obligations (a)			—			—		(2	)		(2	)
	Other Non-Current Liabilities:
	Contractual Obligations (a)			—			—		(1	)		(1	)
	Total		$	—		$	—	$	(3	)	$	(3	)
			Fair Value Measurements as of  September 30, 2014
			(Level 1)			(Level 2)		(Level 3)			Total
			(in millions)
	Other Current Liabilities:
	Contractual Obligations (a)			—			—		(2	)		(2	)
	Other Non-Current Liabilities:
	Contractual Obligations (a)			—			—		(1	)		(1	)
	Total		$	—		$	—	$	(3	)	$	(3	)
	(a)	This represents purchase obligations and contingent consideration related to the Company’s various acquisitions. This is based on a discounted cash flow approach and it is adjusted to fair value on a recurring basis and any adjustments are included as a component of operating income in the statement of operations. These amounts were mainly calculated using unobservable inputs such as future earnings performance of the Company’s various acquisitions and the expected timing of the payment.
Reconciliation of Net Liabilities Classified as Level 3	The following table reconciles the beginning and ending balances of net assets and liabilities classified as Level 3:
			Total
			(in millions)
	Balance at September 30, 2014		$	(3	)
	Additions			—
	Reductions			—
	Payments			—
	Balance at December 31, 2014		$	(3	)

Guarantor_and_NonGuarantor_Sub1

Guarantor and Non-Guarantor Subsidiaries Financial Information (Tables)	3 Months Ended
	Dec. 31, 2014
Condensed Financial Information Of Parent Company Only Disclosure [Abstract]
Guarantor and Non-Guarantor Subsidiaries Financial Information	Consolidating Balance Sheet
	December 31, 2014
		WMG												WMG			WMG			Warner							Warner
		Acquisition						Non-						Acquisition			Holdings			Music							Music
		Corp.			Guarantor			Guarantor						Corp.			Corp.			Group							Group Corp.
		(issuer)			Subsidiaries			Subsidiaries			Eliminations			Consolidated			(issuer)			Corp.			Eliminations				Consolidated
		(in millions)
	Assets:
	Current assets:
	Cash and equivalents	$	—		$	22		$	123		$	—		$	145		$	—		$	—		$	—			$	145
	Accounts receivable, net		—			137			299			—			436			—			—			—				436
	Inventories		—			12			27			—			39			—			—			—				39
	Royalty advances expected to be recouped within one year		—			61			42			—			103			—			—			—				103
	Deferred tax assets		—			21			25			—			46			—			—			—				46
	Prepaid and other current assets		5			7			44			—			56			—			—			—				56
	Total current assets		5			260			560			—			825			—			—			—				825
	Due (to) from parent companies		998			(347	)		(651	)		—			—			—			—			—				—
	Investments in and advances to (from) consolidated subsidiaries		2,319			1,303			—			(3,622	)		—			444			295			(739	)			—
	Royalty advances expected to be recouped after one year		—			113			77			—			190			—			—			—				190
	Property, plant and equipment, net		—			151			82			—			233			—			—			—				233
	Goodwill		—			1,378			271			—			1,649			—			—			—				1,649
	Intangible assets subject to amortization, net		—			1,352			1,403			—			2,755			—			—			—				2,755
	Intangible assets not subject to amortization		—			71			48			—			119			—			—			—				119
	Other assets		44			14			19			—			77			6			—			—				83
	Total assets	$	3,366		$	4,295		$	1,809		$	(3,622	)	$	5,848		$	450		$	295		$	(739	)		$	5,854
	Liabilities and Deficit:
	Current liabilities:
	Accounts payable	$	—		$	75		$	87		$	—		$	162		$	—		$	—		$	—			$	162
	Accrued royalties		—			494			652			—			1,146			—			—			—				1,146
	Accrued liabilities		—			75			175			—			250			—			—			—				250
	Accrued interest		43			—			—			—			43			5			—			—				48
	Deferred revenue		—			186			69			—			255			—			—			—				255
	Current portion of long-term debt		13			—			—			—			13			—			—			—				13
	Other current liabilities		8			1			21			—			30			—			—			—				30
	Total current liabilities		64			831			1,004			—			1,899			5			—			—				1,904
	Long-term debt		2,855			—			—			—			2,855			150			—			—				3,005
	Deferred tax liabilities, net		—			128			247			—			375			—			—			—				375
	Other noncurrent liabilities		3			120			133			—			256			—			—			—				256
	Total liabilities		2,922			1,079			1,384			—			5,385			155			—			—				5,540
	Total Warner Music Group Corp. equity (deficit)		444			3,215			407			(3,622	)		444			295			295			(739	)			295
	Noncontrolling interest		—			1			18			—			19			—			—			—				19
	Total equity (deficit)		444			3,216			425			(3,622	)		463			295			295			(739	)			314
	Total liabilities and equity (deficit)	$	3,366		$	4,295		$	1,809		$	(3,622	)	$	5,848		$	450		$	295		$	(739	)		$	5,854
	Consolidating Balance Sheet
	September 30, 2014
		WMG												WMG			WMG			Warner							Warner
		Acquisition						Non-						Acquisition			Holdings			Music							Music
		Corp.			Guarantor			Guarantor						Corp.			Corp.			Group							Group Corp.
		(issuer)			Subsidiaries			Subsidiaries			Eliminations			Consolidated			(issuer)			Corp.			Eliminations				Consolidated
		(in millions)
	Assets:
	Current assets:
	Cash and equivalents	$	—		$	26		$	131		$	—		$	157		$	—		$	—		$	—			$	157
	Accounts receivable, net		—			174			209			—			383			—			—			—				383
	Inventories		—			13			26			—			39			—			—			—				39
	Royalty advances expected to be recouped within one year		—			62			40			—			102			—			—			—				102
	Deferred tax assets		—			21			25			—			46			—			—			—				46
	Prepaid and other current assets		5			10			40			—			55			—			—			—				55
	Total current assets		5			306			471			—			782			—			—			—				782
	Due (to) from parent companies		924			(242	)		(682	)		—			—			—			—			—				—
	Investments in and advances to (from) consolidated subsidiaries		2,531			1,142			—			(3,673	)		—			525			371			(896	)			—
	Royalty advances expected to be recouped after one year		—			115			75			—			190			—			—			—				190
	Property, plant and equipment, net		—			143			84			—			227			—			—			—				227
	Goodwill		—			1,379			282			—			1,661			—			—			—				1,661
Intangible assets subject to amortization, net		—			1,372			1,512			—			2,884			—			—			—				2,884
Intangible assets not subject to amortization		—			75			45			—			120			—			—			—				120
Other assets		46			10			28			—			84			6			—			—				90
Total assets	$	3,506		$	4,300		$	1,815		$	(3,673	)	$	5,948		$	531		$	371		$	(896	)		$	5,954
Liabilities and Deficit:
Current liabilities:
Accounts payable	$	38		$	91		$	86		$	—		$	215		$	—		$	—		$	—			$	215
Accrued royalties		—			531			601			—			1,132			—			—			—				1,132
Accrued liabilities		—			64			179			—			243			—			—			—				243
Accrued interest		50			—			—			—			50			10			—			—				60
Deferred revenue		—			167			52			—			219			—			—			—				219
Current portion of long-term debt		13			—			—			—			13			—			—			—				13
Other current liabilities		—			1			2			—			3			—			—			—				3
Total current liabilities		101			854			920			—			1,875			10			—			—				1,885
Long-term debt		2,867			—			—			—			2,867			150			—			—				3,017
Deferred tax liabilities, net		—			128			255			—			383			—			—			—				383
Other noncurrent liabilities		13			124			142			—			279			—			—			—				279
Total liabilities		2,981			1,106			1,317			—			5,404			160			—			—				5,564
Total Warner Music Group Corp. equity (deficit)		525			3,192			481			(3,673	)		525			371			371			(896	)			371
Noncontrolling interest		—			2			17			—			19			—			—			—				19
Total equity (deficit)		525			3,194			498			(3,673	)		544			371			371			(896	)			390
Total liabilities and equity (deficit)	$	3,506		$	4,300		$	1,815		$	(3,673	)	$	5,948		$	531		$	371		$	(896	)		$	5,954
Consolidating Statement of Operations
For The Three Months Ended December 31, 2014
	WMG												WMG			WMG			Warner							Warner
	Acquisition						Non-						Acquisition			Holdings			Music							Music
	Corp.			Guarantor			Guarantor						Corp.			Corp.			Group							Group Corp.
	(issuer)			Subsidiaries			Subsidiaries			Eliminations			Consolidated			(issuer)			Corp.			Eliminations				Consolidated
	(in millions)
Revenues	$	—		$	361		$	513		$	(45	)	$	829		$	—		$	—		$	—			$	829
Costs and expenses:
Cost of revenue		—			(167	)		(318	)		40			(445	)		—			—			—				(445	)
Selling, general and administrative expenses		1			(133	)		(169	)		5			(296	)		—			—			—				(296	)
Amortization of intangible assets		—			(30	)		(35	)		—			(65	)		—			—			—				(65	)
Total costs and expenses		1			(330	)		(522	)		45			(806	)		—			—			—				(806	)
Operating (loss) income		1			31			(9	)		—			23			—			—			—				23
Interest income (expense), net		(21	)		2			(22	)		—			(41	)		(5	)		—			—				(46	)
Equity gains (losses) from consolidated subsidiaries		(6	)		(2	)		—			8			—			(37	)		(42	)		79				—
Other income (expense), net		(2	)		—			(7	)		—			(9	)		—			—			—				(9	)
Income (loss) before income taxes		(28	)		31			(38	)		8			(27	)		(42	)		(42	)		79				(32	)
Income tax benefit (expense)		(9	)		(8	)		(1	)		9			(9	)		—			—			—				(9	)
Net income (loss)		(37	)		23			(39	)		17			(36	)		(42	)		(42	)		79				(41	)
Less: income attributable to noncontrolling interest		—			—			(1	)		—			(1	)		—			—			—				(1	)
Net income (loss) attributable to Warner Music Group Corp.	$	(37	)	$	23		$	(40	)	$	17		$	(37	)	$	(42	)	$	(42	)	$	79			$	(42	)
Consolidating Statement of Operations
For The Three Months Ended December 31, 2013
	WMG												WMG			WMG			Warner							Warner
	Acquisition						Non-						Acquisition			Holdings			Music							Music
	Corp.			Guarantor			Guarantor						Corp.			Corp.			Group							Group Corp.
	(issuer)			Subsidiaries			Subsidiaries			Eliminations			Consolidated			(issuer)			Corp.			Eliminations				Consolidated
	(in millions)
Revenues	$	—		$	356		$	511		$	(52	)	$	815		$	—		$	—		$	—			$	815
Costs and expenses:
Cost of revenue	$	—		$	(155	)	$	(335	)	$	49		$	(441	)	$	—		$	—		$	—			$	(441	)
Selling, general and administrative expenses		—			(115	)		(181	)		3			(293	)		—			—			—				(293	)
Amortization of intangible assets		—			(30	)		(36	)		—			(66	)		—			—			—				(66	)
Total costs and expenses		—			(300	)		(552	)		52			(800	)		—			—			—				(800	)
Operating income (loss)		—			56			(41	)		—			15			—			—			—				15
Interest income (expense), net		(31	)		1			(20	)		—			(50	)		(5	)		—			—				(55	)
Equity gains (losses) from consolidated subsidiaries		(21	)		5			—			16			—			(32	)		(37	)		69				—
Other income (expense), net		12			(14	)		(2	)		—			(4	)		—			—			—				(4	)
Income (loss) before income taxes		(40	)		48			(63	)		16			(39	)		(37	)		(37	)		69				(44	)
Income tax benefit (expense)		8			(4	)		7			(3	)		8			—			—			—				8
Net income (loss)		(32	)		44			(56	)		13			(31	)		(37	)		(37	)		69				(36	)
Less: income attributable to noncontrolling interest		—			—			(1	)		—			(1	)		—			—			—				(1	)
Net income (loss) attributable to Warner Music Group Corp.	$	(32	)	$	44		$	(57	)	$	13		$	(32	)	$	(37	)	$	(37	)	$	69			$	(37	)
Consolidating Statement of Comprehensive Income
For The Three Months Ended December 31, 2014
	WMG												WMG			WMG			Warner							Warner
	Acquisition						Non-						Acquisition			Holdings			Music							Music
	Corp.			Guarantor			Guarantor						Corp.			Corp.			Group							Group Corp.
	(issuer)			Subsidiaries			Subsidiaries			Eliminations			Consolidated			(issuer)			Corp.			Eliminations				Consolidated
	(in millions)
Net (loss) income	$	(37	)	$	23		$	(39	)	$	17		$	(36	)	$	(42	)	$	(42	)	$	79			$	(41	)
Other comprehensive income (loss), net of tax:
Foreign currency adjustment		(34	)		—			(34	)		34			(34	)		(34	)		(34	)		68				(34	)
Other comprehensive income (loss), net of tax:		(34	)		—			(34	)		34			(34	)		(34	)		(34	)		68				(34	)
Total comprehensive (loss) income		(71	)		23			(73	)		51			(70	)		(76	)		(76	)		147				(75	)
Less: income attributable to noncontrolling interest		—			—			(1	)		—			(1	)		—			—			—				(1	)
Comprehensive (loss) income attributable to Warner Music Group	$	(71	)	$	23		$	(74	)	$	51		$	(71	)	$	(76	)	$	(76	)	$	147			$	(76	)
Corp.
Consolidating Statement of Comprehensive Income
For The Three Months Ended December 31, 2013
	WMG												WMG			WMG			Warner							Warner
	Acquisition						Non-						Acquisition			Holdings			Music							Music
	Corp.			Guarantor			Guarantor						Corp.			Corp.			Group							Group Corp.
	(issuer)			Subsidiaries			Subsidiaries			Eliminations			Consolidated			(issuer)			Corp.			Eliminations				Consolidated
	(in millions)
Net (loss) income	$	(32	)	$	44		$	(56	)	$	13		$	(31	)	$	(37	)	$	(37	)	$	69			$	(36	)
Other comprehensive income (loss), net of tax:
Foreign currency adjustment		(8	)					(8	)		8			(8	)		(8	)		(8	)		16				(8	)
Other comprehensive income (loss), net of tax:		(8	)		—			(8	)		8			(8	)		(8	)		(8	)		16				(8	)
Total comprehensive (loss) income		(40	)		44			(64	)		21			(39	)		(45	)		(45	)		85				(44	)
Less: income attributable to noncontrolling interest		—			—			(1	)		—			(1	)		—			—			—				(1	)
Comprehensive (loss) income attributable to Warner Music Group	$	(40	)	$	44		$	(65	)	$	21		$	(40	)	$	(45	)	$	(45	)	$	85			$	(45	)
Corp.
Consolidating Statement of Cash Flows
For The Three Months Ended December 31, 2014
	WMG												WMG			WMG			Warner							Warner
	Acquisition						Non-						Acquisition			Holdings			Music							Music
	Corp.			Guarantor			Guarantor						Corp.			Corp.			Group							Group Corp.
	(issuer)			Subsidiaries			Subsidiaries			Eliminations			Consolidated			(issuer)			Corp.			Eliminations				Consolidated
	(in millions)
Cash flows from operating activities
Net (loss) income	$	(37	)	$	23		$	(39	)	$	17		$	(36	)	$	(42	)	$	(42	)	$	79			$	(41	)
Adjustments to reconcile net (loss) income to net cash provided by
operating activities:
Depreciation and amortization		—			41			38			—			79			—			—			—				79
Unrealized gains/losses and remeasurement of foreign denominated loans		(9	)		—			23			—			14			—			—			—				14
Deferred income taxes		—			—			—			—			—			—			—			—				—
Non-cash interest expense		2			—			—			—			2			—			—			—				2
Non-cash share-based compensation expense		—			—			—			—			—			—			—			—				—
Equity losses (gains), including distributions		6			2			—			(8	)		—			37			42			(79	)			—
Changes in operating assets and liabilities:		—			—			—			—			—			—			—			—				—
Accounts receivable		—			38			(105	)		—			(67	)		—			—			—				(67	)
Inventories		—			1			(2	)		—			(1	)		—			—			—				(1	)
Royalty advances		—			2			(9	)		—			(7	)		—			—			—				(7	)
Accounts payable and accrued liabilities		—			(10	)		(37	)		—			(47	)		—			—			—				(47	)
Royalty payables		—			(37	)		83			—			46			—			—			—				46
Accrued interest		(7	)		—			—			—			(7	)		(5	)		—			—				(12	)
Deferred revenue		—			19			20			—			39			—			—			—				39
Other balance sheet changes		(1	)		4			36			(9	)		30			—			—			—				30
Net cash provided by (used in) operating activities		(46	)		83			8			—			45			(10	)		—			—				35
Cash flows from investing activities
Acquisition of music publishing rights, net		—			(4	)		(1	)		—			(5	)		—			—			—				(5	)
Capital expenditures		—			(18	)		(6	)		—			(24	)		—			—			—				(24	)
Investments and acquisitions of businesses, net		—			(6	)		(2	)		—			(8	)		—			—			—				(8	)
Advances to issuer		59			—			—			(59	)		—			—			—			—				—
Net cash provided by (used in) investing activities		59			(28	)		(9	)		(59	)		(37	)		—			—			—				(37	)
Cash flows from financing activities
Dividend by Acquisition Corp. to Holdings Corp.		(10	)		—			—			—			(10	)		10			—			—				—
Proceeds from the Revolving Credit Facility		100			—			—			—			100			—			—			—				100
Repayment of the Revolving Credit Facility		(100	)		—			—			—			(100	)		—			—			—				(100	)
Repayment of Acquisition Corp. Senior Term Loan Facility		(3	)		—			—			—			(3	)		—			—			—				(3	)
Distribution to noncontrolling interest holder		—			—			—			—			—			—			—			—				—
Change in due to (from) issuer		—			(59	)		—			59			—			—			—			—				—
Net cash provided by (used in) financing activities		(13	)		(59	)		—			59			(13	)		10			—			—				(3	)
Effect of exchange rate changes on cash and equivalents		—			—			(7	)		—			(7	)		—			—			—				(7	)
Net increase (decrease) in cash and equivalents		—			(4	)		(8	)		—			(12	)		—			—			—				(12	)
Cash and equivalents at beginning of period		—			26			131			—			157			—			—			—				157
Cash and equivalents at end of period	$	—		$	22		$	123		$	—		$	145		$	—		$	—		$	—			$	145
Consolidating Statement of Cash Flows
For The Three Months Ended December 31, 2013
	WMG																	WMG					WMG						Warner						Warner
	Acquisition						Non-											Acquisition					Holdings						Music						Music
	Corp.			Guarantor			Guarantor											Corp.					Corp.						Group						Group Corp.
	(issuer)			Subsidiaries			Subsidiaries					Eliminations						Consolidated					(issuer)						Corp.			Eliminations			Consolidated
	(in millions)
Cash flows from operating activities
Net (loss) income	$	(32	)	$	44		$	(56	)			$	13					$	(31	)			$		(37	)			$	(37	)	$	69		$	(36	)
Adjustments to reconcile net (loss) income to net cash provided by
operating activities:
Depreciation and amortization		—			38			40					—						78						—					—			—			78
Unrealized gains/losses and remeasurement of foreign denominated loans		3			(8	)		(15	)				—						(20	)					—					—			—			(20	)
Deferred income taxes		—			—			(16	)				—						(16	)					—					—			—			(16	)
Non-cash interest expense		4			—			—					—						4						—					—			—			4
Non-cash share-based compensation expense		—			3			—					—						3						—					—			—			3
Equity losses (gains), including distributions		21			(5	)		—					(16		)				—						32					37			(69	)		—
Changes in operating assets and liabilities:
Accounts receivable		—			2			(58	)				—						(56	)					—					—			—			(56	)
Inventories		—			1			(2	)				—						(1	)					—					—			—			(1	)
Royalty advances		—			2			(37	)				—						(35	)					—					—			—			(35	)
Accounts payable and accrued liabilities		—			(109	)		51					(21		)				(79	)					—					—			—			(79	)
Royalty payables		—			(56	)		112					—						56						—					—			—			56
Accrued interest		(12	)		—			—					—						(12	)					(5	)				—			—			(17	)
Deferred revenue		—			60			—					—						60						—					—			—			60
Other balance sheet changes		—			9			(26	)				24						7						—					—			—			7
Net cash provided by (used in) operating activities		(16	)		(19	)		(7	)				—						(42	)					(10	)				—			—			(52	)
Cash flows from investing activities
Acquisition of music publishing rights, net		—			(6	)		(4	)				—						(10	)					—					—			—			(10	)
Capital expenditures		—			(9	)		(3	)				—						(12	)					—					—			—			(12	)
Investments and acquisitions of businesses, net		-			(1	)		(3	)				—						(4	)					—					—			—			(4	)
Advances to issuer		(29	)		—			—					29						—						—					—			—			—
Net cash provided by (used in) investing activities		(29	)		(16	)		(10	)				29						(26	)					—					—			—			(26	)
Cash flows from financing activities
Dividend by Acquisition Corp. to Holdings Corp.		(10	)		—			—					—						(10	)					10					—			—			—
Proceeds from the Revolving Credit Facility		155			—			—					—						155						—					—			—			155
Repayment of the Revolving Credit Facility		(100	)		—			—					—						(100	)					—					—			—			(100	)
Distribution to noncontrolling interest holder		—			—			(1	)				—						(1	)					—					—			—			(1	)
Change in due to (from) issuer		—			29			—					(29		)				—						—					—			—			—
Net cash provided by (used in) financing activities		45			29			(1	)				(29		)				44						10					—			—			54
Effect of exchange rate changes on cash and equivalents		—			—			(2	)				—						(2	)					—					—			—			(2	)
Net increase (decrease) in cash and equivalents		—			(6	)		(20	)				—						(26	)					—					—			—			(26	)
Cash and equivalents at beginning of period		—			16			139					—						155						—					—			—			155
Cash and equivalents at end of period	$	—		$	10		$	119				$	—					$	129				$		—				$	—		$	—		$	129

Description_of_Business_Additi

Description of Business - Additional Information (Detail)	3 Months Ended	0 Months Ended
	Dec. 31, 2014	Jul. 02, 2013
	Operations
	songwriters
	Country
Description Of Business [Line Items]
Number of fundamental operations	2
Number of countries in which Recorded Music activity conducted	50
Number of songwriters and composers	65,000
Word
Description Of Business [Line Items]
Percentage of ownership	80.00%
Parlophone Label Group
Description Of Business [Line Items]
Acquisition date		1-Jul-13

Comprehensive_Loss_Schedule_of

Comprehensive Loss - Schedule of Accumulated Other Comprehensive Loss (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	($108)
Other comprehensive loss	-34	[1]	-8
Amounts reclassified from accumulated other comprehensive income	0
Ending balance	-142
Foreign Currency Translation Loss
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	-98
Other comprehensive loss	-34	[1]
Amounts reclassified from accumulated other comprehensive income	0
Ending balance	-132
Minimum Pension Liability Adjustment
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	-10
Other comprehensive loss	0	[1]
Amounts reclassified from accumulated other comprehensive income	0
Ending balance	($10)
[1]	Foreign currency translation adjustments include intra-entity foreign currency transactions that are of a long-term investment nature of $38.9 million

Comprehensive_Loss_Schedule_of1

Comprehensive Loss - Schedule of Accumulated Other Comprehensive Loss (Parenthetical) (Detail) (USD $)	Dec. 31, 2014
In Millions, unless otherwise specified
Equity [Abstract]
Intra-entity foreign currency transaction adjustments	$38.90

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets - Changes in Goodwill for Each Reportable Segment (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
Goodwill [Line Items]
Beginning balance	$1,661
Acquisitions	2
Dispositions	0
Other adjustments	-14
Ending balance	1,649
Recorded Music
Goodwill [Line Items]
Beginning balance	1,197
Acquisitions	2
Dispositions	0
Other adjustments	-14
Ending balance	1,185
Music Publishing
Goodwill [Line Items]
Beginning balance	464
Dispositions	0
Ending balance	$464

Goodwill_and_Intangible_Assets3

Goodwill and Intangible Assets - Schedule of Intangible Assets (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Total gross intangible asset subject to amortization	$3,490	$3,572
Accumulated amortization	-735	-688
Total net intangible assets subject to amortization	2,755	2,884
Intangible assets not subject to amortization	119	120
Total net other intangible assets	2,874	3,004
Trademarks and tradenames
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Intangible assets not subject to amortization	119	120
Recorded Music catalog
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Intangible assets, Useful Life	11 years
Total gross intangible asset subject to amortization	1,010	1,040
Music Publishing copyrights
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Intangible assets, Useful Life	27 years
Total gross intangible asset subject to amortization	1,527	1,550
Artist and songwriter contracts
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Intangible assets, Useful Life	13 years
Total gross intangible asset subject to amortization	946	975
Trademarks
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Intangible assets, Useful Life	7 years
Total gross intangible asset subject to amortization	$7	$7

Debt_Longterm_Debt_Detail

Debt - Long-term Debt (Detail) (USD $)	Dec. 31, 2014		Sep. 30, 2014
In Millions, unless otherwise specified
Debt Instrument [Line Items]
Total debt	$3,018		$3,030
Less: current portion	13		13
Long-term debt	3,005		3,017
Senior Term Loan Facility due 2020
Debt Instrument [Line Items]
Total debt	1,291	[1]	1,294	[1]
5.625% Senior Secured Notes
Debt Instrument [Line Items]
Total debt	275		275
6.00% Senior Secured Notes
Debt Instrument [Line Items]
Total debt	450		450
6.25% Senior Secured Notes
Debt Instrument [Line Items]
Total debt	192	[2]	201	[2]
6.75% Senior Notes due 2022
Debt Instrument [Line Items]
Total debt	660		660
13.75% Holdings Notes due 2019
Debt Instrument [Line Items]
Total debt	150		150
Revolving Credit Facility
Debt Instrument [Line Items]
Total debt	$0	[3]	$0	[3]
[1]	Principal amount of $1.297 billion and $1.300 billion less unamortized discount of $6 million and $6 million at December 31, 2014 and September 30, 2014, respectively. Of this amount, $13 million, representing the scheduled amortization of the Term Loan, was included in the current portion of long-term debt at December 31, 2014 and September 30, 2014.
[2]	Face amount of €158 million. Above amounts represent the dollar equivalent of such notes at December 31, 2014 and September 30, 2014.
[3]	Reflects $150 million of commitments under the Revolving Credit Facility, less letters of credit outstanding of approximately $10 million and $11 million at December 31, 2014 and September 30, 2014, respectively. There were no loans outstanding under the Revolving Credit Facility at December 31, 2014 or September 30, 2014.

Debt_Longterm_Debt_Parenthetic

Debt - Long-term Debt (Parenthetical) (Detail)	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2014	Sep. 30, 2014
In Millions, unless otherwise specified	USD ($)	USD ($)	Revolving Credit Facility	Revolving Credit Facility	Term Loan Facility due 2020	Term Loan Facility due 2020	5.625% Senior Secured Notes	5.625% Senior Secured Notes	6.00% Senior Secured Notes	6.00% Senior Secured Notes	6.25% Senior Secured Notes	6.25% Senior Secured Notes	6.75% Senior Notes due 2022	6.75% Senior Notes due 2022	13.75% Holdings Notes due 2019	13.75% Holdings Notes due 2019
			USD ($)	USD ($)	USD ($)	USD ($)					EUR (€)	EUR (€)
Debt Instrument [Line Items]
Maturity date					2020	2020	2022	2022	2021	2021	2021	2021	2022	2022	2019	2019
Interest rate							5.63%	5.63%	6.00%	6.00%	6.25%	6.25%	6.75%	6.75%	13.75%	13.75%
Commitments under revolving credit facility			$150
Letters of credit outstanding			10	11
Revolving Credit Facility Outstanding			0	0
Face or principal amount of debt instrument					1,297	1,300					158	158
Unamortized discount					6	6
Current portion of long-term debt	$13	$13			$13	$13

Debt_Interest_Rates_Additional

Debt - Interest Rates - Additional Information (Detail)	3 Months Ended
	Dec. 31, 2014
Term Loan Facility
Debt Instrument [Line Items]
Interest rate applicable to overdue principal	2.00%
Description of variable rate basis	The loans under the Senior Term Loan Facility bear interest at Acquisition Corp.bs election at a rate equal to (i) the rate for deposits in U.S. dollars in the London interbank market (adjusted for maximum reserves) for the applicable interest period (bTerm Loan LIBORb), plus 2.75% per annum, or (ii) the base rate, which is the highest of (x) the corporate base rate established by the administrative agent as its prime rate in effect at its principal office in New York City from time to time, (y) 0.50% in excess of the overnight federal funds rate and (z) one-month Term Loan LIBOR, plus 1.00% per annum, plus, in each case, 1.75% per annum.
Term loan Base rate plus Election Rate	1.00%
Term Loan Facility | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument, marginal interest rate	2.75%
Term Loan Facility | Base Rate
Debt Instrument [Line Items]
Debt instrument, marginal interest rate	1.75%
Term Loan Facility | Federal Funds Effective Swap Rate
Debt Instrument [Line Items]
Debt instrument, marginal interest rate	0.50%
Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate applicable to overdue principal	2.00%
Description of variable rate basis	The loans under the Revolving Credit Facility bear interest at Acquisition Corp.bs election at a rate equal to (i) the rate for deposits in the borrowing currency in the London interbank market (adjusted for maximum reserves) for the applicable interest period (bRevolving LIBORb), plus 2.00% per annum, or (ii) the base rate, which is the highest of (x) the corporate base rate established by the administrative agent from time to time, (y) 0.50% in excess of the overnight federal funds rate and (z) the one-month Revolving LIBOR plus 1.0% per annum, plus, in each case, 1.00% per annum. If there is a payment default at any time, then the interest rate applicable to overdue principal will be the rate otherwise applicable to such loan plus 2.0% per annum.
Revolver Libor rate plus Election Rate	2.00%
Revolving Credit Facility | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument, marginal interest rate	2.00%
Revolving Credit Facility | Base Rate
Debt Instrument [Line Items]
Debt instrument, marginal interest rate	1.00%
Revolving Credit Facility | Federal Funds Effective Swap Rate
Debt Instrument [Line Items]
Debt instrument, marginal interest rate	0.50%
Term Loan Facility due 2020 | Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate applicable to overdue principal	2.00%
Interest Rate Floor | Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, marginal interest rate	1.00%

Debt_Additional_Information_De

Debt - Additional Information (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2014
Debt Instrument [Line Items]
Annual Amortization of original principal on term loan	1.00%
Annual amortization amount of original principal on term loan	$13
Total interest expense, net	-46	-55
Weighted-average interest rate of total debt	5.60%		5.60%
Senior Notes
Debt Instrument [Line Items]
Scheduled maturities of long-term debt in 2019	150
Scheduled to mature	$1,577
Term Loan Facility
Debt Instrument [Line Items]
Credit Facility maturity date	1-Jul-20
Revolving Credit Facility
Debt Instrument [Line Items]
Extended maturity date of credit facility	1-Apr-19

Restructuring_Additional_Infor

Restructuring - Additional Information (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Restructuring Cost And Reserve [Line Items]
Restructuring charges	$77
Restructuring expense	1	7
Restructuring cost incurred to date	73
Employee-Related Costs
Restructuring Cost And Reserve [Line Items]
Restructuring charges	69
Real Estate Costs
Restructuring Cost And Reserve [Line Items]
Restructuring charges	6
Restructuring expense	1
Other Costs
Restructuring Cost And Reserve [Line Items]
Restructuring charges	2
Cash Payments
Restructuring Cost And Reserve [Line Items]
Restructuring cost incurred to date	$68

Restructuring_Summary_of_Restr

Restructuring - Summary of Restructuring Activity (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Restructuring Cost And Reserve [Line Items]
Beginning balance	$13
Restructuring expense	1	7
Cash payments	-9
Ending balance	5
Employee-Related Costs
Restructuring Cost And Reserve [Line Items]
Beginning balance	12
Cash payments	-8
Ending balance	4
Real Estate Costs
Restructuring Cost And Reserve [Line Items]
Beginning balance	1
Restructuring expense	1
Cash payments	-1
Ending balance	$1

Restructuring_Summary_of_Charg

Restructuring - Summary of Charges in Consolidated Statement of Operations (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Restructuring Cost And Reserve [Line Items]
Total restructuring expense	$1	$7
Selling, General and Administrative Expenses
Restructuring Cost And Reserve [Line Items]
Total restructuring expense	$1	$7

Commitments_and_Contingencies_

Commitments and Contingencies - Additional Information (Detail) (USD $)	0 Months Ended
In Millions, unless otherwise specified	Jan. 23, 2014	Mar. 10, 2012
		Lawsuits
Commitments And Contingencies Disclosure [Abstract]
Number of putative class action lawsuits		5
Settlement amount	$11.50
Settlement agreement effective date	2/25/15

Segment_Information_Additional

Segment Information - Additional Information (Detail)	3 Months Ended
	Dec. 31, 2014
	Operations
Segment Reporting [Abstract]
Number of fundamental operations	2

Segment_Information_Schedule_o

Segment Information - Schedule of Segment Information (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenues	$829	$815
OIBDA	102	93
Depreciation of property, plant and equipment	-14	-12
Amortization expense	-65	-66
Operating income	23	15
Operating Segments | Recorded Music
Segment Reporting Information [Line Items]
Revenues	714	691
OIBDA	111	93
Depreciation of property, plant and equipment	-10	-8
Amortization expense	-49	-50
Operating income	52	35
Operating Segments | Music Publishing
Segment Reporting Information [Line Items]
Revenues	119	128
OIBDA	17	19
Depreciation of property, plant and equipment	-1	-1
Amortization expense	-16	-16
Operating income		2
Corporate Expenses and Eliminations
Segment Reporting Information [Line Items]
Revenues	-4	-4
OIBDA	-26	-19
Depreciation of property, plant and equipment	-3	-3
Amortization expense	0	0
Operating income	($29)	($22)

Additional_Financial_Informati1

Additional Financial Information - Additional Information (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Supplemental Cash Flow Information [Line Items]
Accrued interest paid	$56	$68
GERMANY
Supplemental Cash Flow Information [Line Items]
Income and withholding taxes, net of refunds		3
Cash tax paid	8
Tax refund	$9

Fair_Value_Measurements_Schedu

Fair Value Measurements - Schedule of Fair Value of Financial Instruments (Detail) (USD $)	Dec. 31, 2014		Sep. 30, 2014
In Millions, unless otherwise specified
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total	($3)		($3)
Contractual Obligations | Other Current Liabilities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Contractual Obligations	-2	[1]	-2	[1]
Contractual Obligations | Other Non-Current Liabilities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Contractual Obligations	-1	[1]	-1	[1]
Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total	-3		-3
Level 3 | Contractual Obligations | Other Current Liabilities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Contractual Obligations	-2	[1]	-2	[1]
Level 3 | Contractual Obligations | Other Non-Current Liabilities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Contractual Obligations	($1)	[1]	($1)	[1]
[1]	This represents purchase obligations and contingent consideration related to the Companybs various acquisitions. This is based on a discounted cash flow approach and it is adjusted to fair value on a recurring basis and any adjustments are included as a component of operating income in the statement of operations. These amounts were mainly calculated using unobservable inputs such as future earnings performance of the Companybs various acquisitions and the expected timing of the payment.

Fair_Value_Measurements_Reconc

Fair Value Measurements - Reconciliation of Net Liabilities Classified as Level 3 (Detail) (Level 3, USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
Level 3
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance at September 30, 2014	($3)
Additions	0
Reductions	0
Payments	0
Balance at December 31, 2014	($3)

Fair_Value_Measurements_Additi

Fair Value Measurements - Additional Information (Detail) (USD $)	Dec. 31, 2014	Sep. 30, 2014
In Millions, unless otherwise specified
Fair Value Disclosures [Abstract]
Debt Instrument, Fair Value Disclosure	$2,890	$3,026

Guarantor_and_NonGuarantor_Sub2

Guarantor and Non-Guarantor Subsidiaries Financial Information - Additional Information (Detail)	3 Months Ended	12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014
13.75% Holdings Notes due 2019
Parent Company Only Financial Information [Line Items]
Interest rate	13.75%	13.75%
Maturity date	2019	2019
5.625% Senior Secured Notes
Parent Company Only Financial Information [Line Items]
Interest rate	5.63%	5.63%
Maturity date	2022	2022
6.00% Senior Secured Notes due 2021
Parent Company Only Financial Information [Line Items]
Interest rate	6.00%	6.00%
Maturity date	2021	2021
6.25% Senior Secured Notes
Parent Company Only Financial Information [Line Items]
Interest rate	6.25%	6.25%
Maturity date	2021	2021
6.75% Senior Notes due 2022
Parent Company Only Financial Information [Line Items]
Interest rate	6.75%	6.75%
Maturity date	2022	2022

Guarantor_and_NonGuarantor_Sub3

Guarantor and Non-Guarantor Subsidiaries Financial Information - Consolidating Balance Sheet (Detail) (USD $)	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
In Millions, unless otherwise specified
Current assets:
Cash and equivalents	$145	$157	$129	$155
Accounts receivable, net	436	383
Inventories	39	39
Royalty advances expected to be recouped within one year	103	102
Deferred tax assets	46	46
Prepaid and other current assets	56	55
Total current assets	825	782
Due (to) from parent companies	0	0
Investments in and advances to (from) consolidated subsidiaries	0	0
Royalty advances expected to be recouped after one year	190	190
Property, plant and equipment, net	233	227
Goodwill	1,649	1,661
Intangible assets subject to amortization, net	2,755	2,884
Intangible assets not subject to amortization	119	120
Other assets	83	90
Total assets	5,854	5,954
Current liabilities:
Accounts payable	162	215
Accrued royalties	1,146	1,132
Accrued liabilities	250	243
Accrued interest	48	60
Deferred revenue	255	219
Current portion of long-term debt	13	13
Other current liabilities	30	3
Total current liabilities	1,904	1,885
Long-term debt	3,005	3,017
Deferred tax liabilities, net	375	383
Other noncurrent liabilities	256	279
Total liabilities	5,540	5,564
Total Warner Music Group Corp. equity (deficit)	295	371
Noncontrolling interest	19	19
Total equity	314	390
Total liabilities and equity	5,854	5,954
Eliminations
Current assets:
Cash and equivalents	0	0	0	0
Accounts receivable, net	0	0
Inventories	0	0
Royalty advances expected to be recouped within one year	0	0
Deferred tax assets	0	0
Prepaid and other current assets	0	0
Total current assets	0	0
Due (to) from parent companies	0	0
Investments in and advances to (from) consolidated subsidiaries	-3,622	-3,673
Royalty advances expected to be recouped after one year	0	0
Property, plant and equipment, net	0	0
Goodwill	0	0
Intangible assets subject to amortization, net	0	0
Intangible assets not subject to amortization	0	0
Other assets	0	0
Total assets	-3,622	-3,673
Current liabilities:
Accounts payable	0	0
Accrued royalties	0	0
Accrued liabilities	0	0
Accrued interest	0	0
Deferred revenue	0	0
Current portion of long-term debt	0	0
Other current liabilities	0	0
Total current liabilities	0	0
Long-term debt	0	0
Deferred tax liabilities, net	0	0
Other noncurrent liabilities	0	0
Total liabilities	0	0
Total Warner Music Group Corp. equity (deficit)	-3,622	-3,673
Noncontrolling interest	0	0
Total equity	-3,622	-3,673
Total liabilities and equity	-3,622	-3,673
Eliminations
Current assets:
Cash and equivalents	0	0	0	0
Accounts receivable, net	0	0
Inventories	0	0
Royalty advances expected to be recouped within one year	0	0
Deferred tax assets	0	0
Prepaid and other current assets	0	0
Total current assets	0	0
Due (to) from parent companies	0	0
Investments in and advances to (from) consolidated subsidiaries	-739	-896
Royalty advances expected to be recouped after one year	0	0
Property, plant and equipment, net	0	0
Goodwill	0	0
Intangible assets subject to amortization, net	0	0
Intangible assets not subject to amortization	0	0
Other assets	0	0
Total assets	-739	-896
Current liabilities:
Accounts payable	0	0
Accrued royalties	0	0
Accrued liabilities	0	0
Accrued interest	0	0
Deferred revenue	0	0
Current portion of long-term debt	0	0
Other current liabilities	0	0
Total current liabilities	0	0
Long-term debt	0	0
Deferred tax liabilities, net	0	0
Other noncurrent liabilities	0	0
Total liabilities	0	0
Total Warner Music Group Corp. equity (deficit)	-739	-896
Noncontrolling interest	0	0
Total equity	-739	-896
Total liabilities and equity	-739	-896
WMG Acquisition Corp. (issuer)
Current assets:
Cash and equivalents	0	0	0	0
Accounts receivable, net	0	0
Inventories	0	0
Royalty advances expected to be recouped within one year	0	0
Deferred tax assets	0	0
Prepaid and other current assets	5	5
Total current assets	5	5
Due (to) from parent companies	998	924
Investments in and advances to (from) consolidated subsidiaries	2,319	2,531
Royalty advances expected to be recouped after one year	0	0
Property, plant and equipment, net	0	0
Goodwill	0	0
Intangible assets subject to amortization, net	0	0
Intangible assets not subject to amortization	0	0
Other assets	44	46
Total assets	3,366	3,506
Current liabilities:
Accounts payable	0	38
Accrued royalties	0	0
Accrued liabilities	0	0
Accrued interest	43	50
Deferred revenue	0	0
Current portion of long-term debt	13	13
Other current liabilities	8	0
Total current liabilities	64	101
Long-term debt	2,855	2,867
Deferred tax liabilities, net	0	0
Other noncurrent liabilities	3	13
Total liabilities	2,922	2,981
Total Warner Music Group Corp. equity (deficit)	444	525
Noncontrolling interest	0	0
Total equity	444	525
Total liabilities and equity	3,366	3,506
Guarantor Subsidiaries
Current assets:
Cash and equivalents	22	26	10	16
Accounts receivable, net	137	174
Inventories	12	13
Royalty advances expected to be recouped within one year	61	62
Deferred tax assets	21	21
Prepaid and other current assets	7	10
Total current assets	260	306
Due (to) from parent companies	-347	-242
Investments in and advances to (from) consolidated subsidiaries	1,303	1,142
Royalty advances expected to be recouped after one year	113	115
Property, plant and equipment, net	151	143
Goodwill	1,378	1,379
Intangible assets subject to amortization, net	1,352	1,372
Intangible assets not subject to amortization	71	75
Other assets	14	10
Total assets	4,295	4,300
Current liabilities:
Accounts payable	75	91
Accrued royalties	494	531
Accrued liabilities	75	64
Accrued interest	0	0
Deferred revenue	186	167
Current portion of long-term debt	0	0
Other current liabilities	1	1
Total current liabilities	831	854
Long-term debt	0	0
Deferred tax liabilities, net	128	128
Other noncurrent liabilities	120	124
Total liabilities	1,079	1,106
Total Warner Music Group Corp. equity (deficit)	3,215	3,192
Noncontrolling interest	1	2
Total equity	3,216	3,194
Total liabilities and equity	4,295	4,300
Non-Guarantor Subsidiaries
Current assets:
Cash and equivalents	123	131	119	139
Accounts receivable, net	299	209
Inventories	27	26
Royalty advances expected to be recouped within one year	42	40
Deferred tax assets	25	25
Prepaid and other current assets	44	40
Total current assets	560	471
Due (to) from parent companies	-651	-682
Investments in and advances to (from) consolidated subsidiaries	0	0
Royalty advances expected to be recouped after one year	77	75
Property, plant and equipment, net	82	84
Goodwill	271	282
Intangible assets subject to amortization, net	1,403	1,512
Intangible assets not subject to amortization	48	45
Other assets	19	28
Total assets	1,809	1,815
Current liabilities:
Accounts payable	87	86
Accrued royalties	652	601
Accrued liabilities	175	179
Accrued interest	0	0
Deferred revenue	69	52
Current portion of long-term debt	0	0
Other current liabilities	21	2
Total current liabilities	1,004	920
Long-term debt	0	0
Deferred tax liabilities, net	247	255
Other noncurrent liabilities	133	142
Total liabilities	1,384	1,317
Total Warner Music Group Corp. equity (deficit)	407	481
Noncontrolling interest	18	17
Total equity	425	498
Total liabilities and equity	1,809	1,815
WMG Acquisition Corp. Consolidated
Current assets:
Cash and equivalents	145	157	129	155
Accounts receivable, net	436	383
Inventories	39	39
Royalty advances expected to be recouped within one year	103	102
Deferred tax assets	46	46
Prepaid and other current assets	56	55
Total current assets	825	782
Due (to) from parent companies	0	0
Investments in and advances to (from) consolidated subsidiaries	0	0
Royalty advances expected to be recouped after one year	190	190
Property, plant and equipment, net	233	227
Goodwill	1,649	1,661
Intangible assets subject to amortization, net	2,755	2,884
Intangible assets not subject to amortization	119	120
Other assets	77	84
Total assets	5,848	5,948
Current liabilities:
Accounts payable	162	215
Accrued royalties	1,146	1,132
Accrued liabilities	250	243
Accrued interest	43	50
Deferred revenue	255	219
Current portion of long-term debt	13	13
Other current liabilities	30	3
Total current liabilities	1,899	1,875
Long-term debt	2,855	2,867
Deferred tax liabilities, net	375	383
Other noncurrent liabilities	256	279
Total liabilities	5,385	5,404
Total Warner Music Group Corp. equity (deficit)	444	525
Noncontrolling interest	19	19
Total equity	463	544
Total liabilities and equity	5,848	5,948
WMG Holdings Corp. (issuer)
Current assets:
Cash and equivalents	0	0	0	0
Accounts receivable, net	0	0
Inventories	0	0
Royalty advances expected to be recouped within one year	0	0
Deferred tax assets	0	0
Prepaid and other current assets	0	0
Total current assets	0	0
Due (to) from parent companies	0	0
Investments in and advances to (from) consolidated subsidiaries	444	525
Royalty advances expected to be recouped after one year	0	0
Property, plant and equipment, net	0	0
Goodwill	0	0
Intangible assets subject to amortization, net	0	0
Intangible assets not subject to amortization	0	0
Other assets	6	6
Total assets	450	531
Current liabilities:
Accounts payable	0	0
Accrued royalties	0	0
Accrued liabilities	0	0
Accrued interest	5	10
Deferred revenue	0	0
Current portion of long-term debt	0	0
Other current liabilities	0	0
Total current liabilities	5	10
Long-term debt	150	150
Deferred tax liabilities, net	0	0
Other noncurrent liabilities	0	0
Total liabilities	155	160
Total Warner Music Group Corp. equity (deficit)	295	371
Noncontrolling interest	0	0
Total equity	295	371
Total liabilities and equity	450	531
Warner Music Group Corp.
Current assets:
Cash and equivalents	0	0	0	0
Accounts receivable, net	0	0
Inventories	0	0
Royalty advances expected to be recouped within one year	0	0
Deferred tax assets	0	0
Prepaid and other current assets	0	0
Total current assets	0	0
Due (to) from parent companies	0	0
Investments in and advances to (from) consolidated subsidiaries	295	371
Royalty advances expected to be recouped after one year	0	0
Property, plant and equipment, net	0	0
Goodwill	0	0
Intangible assets subject to amortization, net	0	0
Intangible assets not subject to amortization	0	0
Other assets	0	0
Total assets	295	371
Current liabilities:
Accounts payable	0	0
Accrued royalties	0	0
Accrued liabilities	0	0
Accrued interest	0	0
Deferred revenue	0	0
Current portion of long-term debt	0	0
Other current liabilities	0	0
Total current liabilities	0	0
Long-term debt	0	0
Deferred tax liabilities, net	0	0
Other noncurrent liabilities	0	0
Total liabilities	0	0
Total Warner Music Group Corp. equity (deficit)	295	371
Noncontrolling interest	0	0
Total equity	295	371
Total liabilities and equity	$295	$371

Guarantor_and_NonGuarantor_Sub4

Guarantor and Non-Guarantor Subsidiaries Financial Information - Consolidating Statement of Operations (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Condensed Income Statements Captions [Line Items]
Revenues	$829		$815
Costs and expenses:
Cost of revenue	-445		-441
Selling, general and administrative expenses	-296	[1]	-293	[1]
Amortization expense	-65		-66
Total costs and expenses	-806		-800
Operating income	23		15
Interest income (expense), net	-46		-55
Equity gains (losses) from consolidated subsidiaries	0		0
Other income (expense), net	-9		-4
Loss before income taxes	-32		-44
Income tax (expense) benefit	-9		8
Net loss	-41		-36
Less: Income attributable to noncontrolling interest	-1		-1
Net loss attributable to Warner Music Group Corp.	-42		-37
Eliminations
Condensed Income Statements Captions [Line Items]
Revenues	-45		-52
Costs and expenses:
Cost of revenue	40		49
Selling, general and administrative expenses	5		3
Amortization expense	0		0
Total costs and expenses	45		52
Operating income	0		0
Interest income (expense), net	0		0
Equity gains (losses) from consolidated subsidiaries	8		16
Other income (expense), net	0		0
Loss before income taxes	8		16
Income tax (expense) benefit	9		-3
Net loss	17		13
Less: Income attributable to noncontrolling interest	0		0
Net loss attributable to Warner Music Group Corp.	17		13
Eliminations
Condensed Income Statements Captions [Line Items]
Revenues	0		0
Costs and expenses:
Cost of revenue	0		0
Selling, general and administrative expenses	0		0
Amortization expense	0		0
Total costs and expenses	0		0
Operating income	0		0
Interest income (expense), net	0		0
Equity gains (losses) from consolidated subsidiaries	79		69
Other income (expense), net	0		0
Loss before income taxes	79		69
Income tax (expense) benefit	0		0
Net loss	79		69
Less: Income attributable to noncontrolling interest	0		0
Net loss attributable to Warner Music Group Corp.	79		69
WMG Acquisition Corp. (issuer)
Condensed Income Statements Captions [Line Items]
Revenues	0		0
Costs and expenses:
Cost of revenue	0		0
Selling, general and administrative expenses	1		0
Amortization expense	0		0
Total costs and expenses	1		0
Operating income	1		0
Interest income (expense), net	-21		-31
Equity gains (losses) from consolidated subsidiaries	-6		-21
Other income (expense), net	-2		12
Loss before income taxes	-28		-40
Income tax (expense) benefit	-9		8
Net loss	-37		-32
Less: Income attributable to noncontrolling interest	0		0
Net loss attributable to Warner Music Group Corp.	-37		-32
Guarantor Subsidiaries
Condensed Income Statements Captions [Line Items]
Revenues	361		356
Costs and expenses:
Cost of revenue	-167		-155
Selling, general and administrative expenses	-133		-115
Amortization expense	-30		-30
Total costs and expenses	-330		-300
Operating income	31		56
Interest income (expense), net	2		1
Equity gains (losses) from consolidated subsidiaries	-2		5
Other income (expense), net	0		-14
Loss before income taxes	31		48
Income tax (expense) benefit	-8		-4
Net loss	23		44
Less: Income attributable to noncontrolling interest	0		0
Net loss attributable to Warner Music Group Corp.	23		44
Non-Guarantor Subsidiaries
Condensed Income Statements Captions [Line Items]
Revenues	513		511
Costs and expenses:
Cost of revenue	-318		-335
Selling, general and administrative expenses	-169		-181
Amortization expense	-35		-36
Total costs and expenses	-522		-552
Operating income	-9		-41
Interest income (expense), net	-22		-20
Equity gains (losses) from consolidated subsidiaries	0		0
Other income (expense), net	-7		-2
Loss before income taxes	-38		-63
Income tax (expense) benefit	-1		7
Net loss	-39		-56
Less: Income attributable to noncontrolling interest	-1		-1
Net loss attributable to Warner Music Group Corp.	-40		-57
WMG Acquisition Corp. Consolidated
Condensed Income Statements Captions [Line Items]
Revenues	829		815
Costs and expenses:
Cost of revenue	-445		-441
Selling, general and administrative expenses	-296		-293
Amortization expense	-65		-66
Total costs and expenses	-806		-800
Operating income	23		15
Interest income (expense), net	-41		-50
Equity gains (losses) from consolidated subsidiaries	0		0
Other income (expense), net	-9		-4
Loss before income taxes	-27		-39
Income tax (expense) benefit	-9		8
Net loss	-36		-31
Less: Income attributable to noncontrolling interest	-1		-1
Net loss attributable to Warner Music Group Corp.	-37		-32
WMG Holdings Corp. (issuer)
Condensed Income Statements Captions [Line Items]
Revenues	0		0
Costs and expenses:
Cost of revenue	0		0
Selling, general and administrative expenses	0		0
Amortization expense	0		0
Total costs and expenses	0		0
Operating income	0		0
Interest income (expense), net	-5		-5
Equity gains (losses) from consolidated subsidiaries	-37		-32
Other income (expense), net	0		0
Loss before income taxes	-42		-37
Income tax (expense) benefit	0		0
Net loss	-42		-37
Less: Income attributable to noncontrolling interest	0		0
Net loss attributable to Warner Music Group Corp.	-42		-37
Warner Music Group Corp.
Condensed Income Statements Captions [Line Items]
Revenues	0		0
Costs and expenses:
Cost of revenue	0		0
Selling, general and administrative expenses	0		0
Amortization expense	0		0
Total costs and expenses	0		0
Operating income	0		0
Interest income (expense), net	0		0
Equity gains (losses) from consolidated subsidiaries	-42		-37
Other income (expense), net	0		0
Loss before income taxes	-42		-37
Income tax (expense) benefit	0		0
Net loss	-42		-37
Less: Income attributable to noncontrolling interest	0		0
Net loss attributable to Warner Music Group Corp.	($42)		($37)
[1]	(a) Includes depreciation expense of: $(14) $(12)

Guarantor_and_NonGuarantor_Sub5

Guarantor and Non-Guarantor Subsidiaries Financial Information - Consolidating Statement of Comprehensive Income (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Condensed Statement Of Income Captions [Line Items]
Net (loss) income	($41)		($36)
Other comprehensive income (loss), net of tax:
Foreign currency adjustment	-34		-8
Other comprehensive loss, net of tax	-34	[1]	-8
Total comprehensive loss	-75		-44
Less: Income attributable to noncontrolling interest	-1		-1
Comprehensive loss attributable to Warner Music Group Corp.	-76		-45
Eliminations
Condensed Statement Of Income Captions [Line Items]
Net (loss) income	17		13
Other comprehensive income (loss), net of tax:
Foreign currency adjustment	34		8
Other comprehensive loss, net of tax	34		8
Total comprehensive loss	51		21
Less: Income attributable to noncontrolling interest	0		0
Comprehensive loss attributable to Warner Music Group Corp.	51		21
Eliminations
Condensed Statement Of Income Captions [Line Items]
Net (loss) income	79		69
Other comprehensive income (loss), net of tax:
Foreign currency adjustment	68		16
Other comprehensive loss, net of tax	68		16
Total comprehensive loss	147		85
Less: Income attributable to noncontrolling interest	0		0
Comprehensive loss attributable to Warner Music Group Corp.	147		85
WMG Acquisition Corp. (issuer)
Condensed Statement Of Income Captions [Line Items]
Net (loss) income	-37		-32
Other comprehensive income (loss), net of tax:
Foreign currency adjustment	-34		-8
Other comprehensive loss, net of tax	-34		-8
Total comprehensive loss	-71		-40
Less: Income attributable to noncontrolling interest	0		0
Comprehensive loss attributable to Warner Music Group Corp.	-71		-40
Guarantor Subsidiaries
Condensed Statement Of Income Captions [Line Items]
Net (loss) income	23		44
Other comprehensive income (loss), net of tax:
Foreign currency adjustment	0		0
Other comprehensive loss, net of tax	0		0
Total comprehensive loss	23		44
Less: Income attributable to noncontrolling interest	0		0
Comprehensive loss attributable to Warner Music Group Corp.	23		44
Non-Guarantor Subsidiaries
Condensed Statement Of Income Captions [Line Items]
Net (loss) income	-39		-56
Other comprehensive income (loss), net of tax:
Foreign currency adjustment	-34		-8
Other comprehensive loss, net of tax	-34		-8
Total comprehensive loss	-73		-64
Less: Income attributable to noncontrolling interest	-1		-1
Comprehensive loss attributable to Warner Music Group Corp.	-74		-65
WMG Acquisition Corp. Consolidated
Condensed Statement Of Income Captions [Line Items]
Net (loss) income	-36		-31
Other comprehensive income (loss), net of tax:
Foreign currency adjustment	-34		-8
Other comprehensive loss, net of tax	-34		-8
Total comprehensive loss	-70		-39
Less: Income attributable to noncontrolling interest	-1		-1
Comprehensive loss attributable to Warner Music Group Corp.	-71		-40
WMG Holdings Corp. (issuer)
Condensed Statement Of Income Captions [Line Items]
Net (loss) income	-42		-37
Other comprehensive income (loss), net of tax:
Foreign currency adjustment	-34		-8
Other comprehensive loss, net of tax	-34		-8
Total comprehensive loss	-76		-45
Less: Income attributable to noncontrolling interest	0		0
Comprehensive loss attributable to Warner Music Group Corp.	-76		-45
Warner Music Group Corp.
Condensed Statement Of Income Captions [Line Items]
Net (loss) income	-42		-37
Other comprehensive income (loss), net of tax:
Foreign currency adjustment	-34		-8
Other comprehensive loss, net of tax	-34		-8
Total comprehensive loss	-76		-45
Less: Income attributable to noncontrolling interest	0		0
Comprehensive loss attributable to Warner Music Group Corp.	($76)		($45)
[1]	Foreign currency translation adjustments include intra-entity foreign currency transactions that are of a long-term investment nature of $38.9 million

Guarantor_and_NonGuarantor_Sub6

Guarantor and Non-Guarantor Subsidiaries Financial Information - Consolidating Statement of Cash Flows (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities
Net (loss) income	($41)	($36)
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	79	78
Unrealized gains/losses and remeasurement of foreign denominated loans	14	-20
Deferred income taxes	0	-16
Non-cash interest expense	2	4
Non-cash share-based compensation expense	0	3
Equity losses (gains), including distributions	0	0
Changes in operating assets and liabilities:
Accounts receivable	-67	-56
Inventories	-1	-1
Royalty advances	-7	-35
Accounts payable and accrued liabilities	-47	-79
Royalty payables	46	56
Accrued interest	-12	-17
Deferred revenue	39	60
Other balance sheet changes	30	7
Net cash provided by (used in) operating activities	35	-52
Cash flows from investing activities
Acquisition of music publishing rights, net	-5	-10
Capital expenditures	-24	-12
Investments and acquisitions of businesses, net	-8	-4
Advances to issuer	0	0
Net cash used in investing activities	-37	-26
Cash flows from financing activities
Dividend by Acquisition Corp. to Holdings Corp.	0	0
Proceeds from the Revolving Credit Facility	100	155
Repayment of the Revolving Credit Facility	-100	-100
Repayment of Acquisition Corp. Senior Term Loan Facility	-3	0
Distribution to noncontrolling interest holder	0	-1
Change in due to (from) issuer	0	0
Net cash (used in) provided by financing activities	-3	54
Effect of exchange rate changes on cash and equivalents	-7	-2
Net decrease in cash and equivalents	-12	-26
Cash and equivalents at beginning of period	157	155
Cash and equivalents at end of period	145	129
Eliminations
Cash flows from operating activities
Net (loss) income	17	13
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	0	0
Unrealized gains/losses and remeasurement of foreign denominated loans	0	0
Deferred income taxes	0	0
Non-cash interest expense	0	0
Non-cash share-based compensation expense	0	0
Equity losses (gains), including distributions	-8	-16
Changes in operating assets and liabilities:
Accounts receivable	0	0
Inventories	0	0
Royalty advances	0	0
Accounts payable and accrued liabilities	0	-21
Royalty payables	0	0
Accrued interest	0	0
Deferred revenue	0	0
Other balance sheet changes	-9	24
Net cash provided by (used in) operating activities	0	0
Cash flows from investing activities
Acquisition of music publishing rights, net	0	0
Capital expenditures	0	0
Investments and acquisitions of businesses, net	0	0
Advances to issuer	-59	29
Net cash used in investing activities	-59	29
Cash flows from financing activities
Dividend by Acquisition Corp. to Holdings Corp.	0	0
Proceeds from the Revolving Credit Facility	0	0
Repayment of the Revolving Credit Facility	0	0
Repayment of Acquisition Corp. Senior Term Loan Facility	0
Distribution to noncontrolling interest holder	0	0
Change in due to (from) issuer	59	-29
Net cash (used in) provided by financing activities	59	-29
Effect of exchange rate changes on cash and equivalents	0	0
Net decrease in cash and equivalents	0	0
Cash and equivalents at beginning of period	0	0
Cash and equivalents at end of period	0	0
Eliminations
Cash flows from operating activities
Net (loss) income	79	69
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	0	0
Unrealized gains/losses and remeasurement of foreign denominated loans	0	0
Deferred income taxes	0	0
Non-cash interest expense	0	0
Non-cash share-based compensation expense	0	0
Equity losses (gains), including distributions	-79	-69
Changes in operating assets and liabilities:
Accounts receivable	0	0
Inventories	0	0
Royalty advances	0	0
Accounts payable and accrued liabilities	0	0
Royalty payables	0	0
Accrued interest	0	0
Deferred revenue	0	0
Other balance sheet changes	0	0
Net cash provided by (used in) operating activities	0	0
Cash flows from investing activities
Acquisition of music publishing rights, net	0	0
Capital expenditures	0	0
Investments and acquisitions of businesses, net	0	0
Advances to issuer	0	0
Net cash used in investing activities	0	0
Cash flows from financing activities
Dividend by Acquisition Corp. to Holdings Corp.	0	0
Proceeds from the Revolving Credit Facility	0	0
Repayment of the Revolving Credit Facility	0	0
Repayment of Acquisition Corp. Senior Term Loan Facility	0
Distribution to noncontrolling interest holder	0	0
Change in due to (from) issuer	0	0
Net cash (used in) provided by financing activities	0	0
Effect of exchange rate changes on cash and equivalents	0	0
Net decrease in cash and equivalents	0	0
Cash and equivalents at beginning of period	0	0
Cash and equivalents at end of period	0	0
WMG Acquisition Corp. (issuer)
Cash flows from operating activities
Net (loss) income	-37	-32
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	0	0
Unrealized gains/losses and remeasurement of foreign denominated loans	-9	3
Deferred income taxes	0	0
Non-cash interest expense	2	4
Non-cash share-based compensation expense	0	0
Equity losses (gains), including distributions	6	21
Changes in operating assets and liabilities:
Accounts receivable	0	0
Inventories	0	0
Royalty advances	0	0
Accounts payable and accrued liabilities	0	0
Royalty payables	0	0
Accrued interest	-7	-12
Deferred revenue	0	0
Other balance sheet changes	-1	0
Net cash provided by (used in) operating activities	-46	-16
Cash flows from investing activities
Acquisition of music publishing rights, net	0	0
Capital expenditures	0	0
Investments and acquisitions of businesses, net	0	0
Advances to issuer	59	-29
Net cash used in investing activities	59	-29
Cash flows from financing activities
Dividend by Acquisition Corp. to Holdings Corp.	-10	-10
Proceeds from the Revolving Credit Facility	100	155
Repayment of the Revolving Credit Facility	-100	-100
Repayment of Acquisition Corp. Senior Term Loan Facility	-3
Distribution to noncontrolling interest holder	0	0
Change in due to (from) issuer	0	0
Net cash (used in) provided by financing activities	-13	45
Effect of exchange rate changes on cash and equivalents	0	0
Net decrease in cash and equivalents	0	0
Cash and equivalents at beginning of period	0	0
Cash and equivalents at end of period	0	0
Guarantor Subsidiaries
Cash flows from operating activities
Net (loss) income	23	44
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	41	38
Unrealized gains/losses and remeasurement of foreign denominated loans	0	-8
Deferred income taxes	0	0
Non-cash interest expense	0	0
Non-cash share-based compensation expense	0	3
Equity losses (gains), including distributions	2	-5
Changes in operating assets and liabilities:
Accounts receivable	38	2
Inventories	1	1
Royalty advances	2	2
Accounts payable and accrued liabilities	-10	-109
Royalty payables	-37	-56
Accrued interest	0	0
Deferred revenue	19	60
Other balance sheet changes	4	9
Net cash provided by (used in) operating activities	83	-19
Cash flows from investing activities
Acquisition of music publishing rights, net	-4	-6
Capital expenditures	-18	-9
Investments and acquisitions of businesses, net	-6	-1
Advances to issuer	0	0
Net cash used in investing activities	-28	-16
Cash flows from financing activities
Dividend by Acquisition Corp. to Holdings Corp.	0	0
Proceeds from the Revolving Credit Facility	0	0
Repayment of the Revolving Credit Facility	0	0
Repayment of Acquisition Corp. Senior Term Loan Facility	0
Distribution to noncontrolling interest holder	0	0
Change in due to (from) issuer	-59	29
Net cash (used in) provided by financing activities	-59	29
Effect of exchange rate changes on cash and equivalents	0	0
Net decrease in cash and equivalents	-4	-6
Cash and equivalents at beginning of period	26	16
Cash and equivalents at end of period	22	10
Non-Guarantor Subsidiaries
Cash flows from operating activities
Net (loss) income	-39	-56
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	38	40
Unrealized gains/losses and remeasurement of foreign denominated loans	23	-15
Deferred income taxes	0	-16
Non-cash interest expense	0	0
Non-cash share-based compensation expense	0	0
Equity losses (gains), including distributions	0	0
Changes in operating assets and liabilities:
Accounts receivable	-105	-58
Inventories	-2	-2
Royalty advances	-9	-37
Accounts payable and accrued liabilities	-37	51
Royalty payables	83	112
Accrued interest	0	0
Deferred revenue	20	0
Other balance sheet changes	36	-26
Net cash provided by (used in) operating activities	8	-7
Cash flows from investing activities
Acquisition of music publishing rights, net	-1	-4
Capital expenditures	-6	-3
Investments and acquisitions of businesses, net	-2	-3
Advances to issuer	0	0
Net cash used in investing activities	-9	-10
Cash flows from financing activities
Dividend by Acquisition Corp. to Holdings Corp.	0	0
Proceeds from the Revolving Credit Facility	0	0
Repayment of the Revolving Credit Facility	0	0
Repayment of Acquisition Corp. Senior Term Loan Facility	0
Distribution to noncontrolling interest holder	0	-1
Change in due to (from) issuer	0	0
Net cash (used in) provided by financing activities	0	-1
Effect of exchange rate changes on cash and equivalents	-7	-2
Net decrease in cash and equivalents	-8	-20
Cash and equivalents at beginning of period	131	139
Cash and equivalents at end of period	123	119
WMG Acquisition Corp. Consolidated
Cash flows from operating activities
Net (loss) income	-36	-31
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	79	78
Unrealized gains/losses and remeasurement of foreign denominated loans	14	-20
Deferred income taxes	0	-16
Non-cash interest expense	2	4
Non-cash share-based compensation expense	0	3
Equity losses (gains), including distributions	0	0
Changes in operating assets and liabilities:
Accounts receivable	-67	-56
Inventories	-1	-1
Royalty advances	-7	-35
Accounts payable and accrued liabilities	-47	-79
Royalty payables	46	56
Accrued interest	-7	-12
Deferred revenue	39	60
Other balance sheet changes	30	7
Net cash provided by (used in) operating activities	45	-42
Cash flows from investing activities
Acquisition of music publishing rights, net	-5	-10
Capital expenditures	-24	-12
Investments and acquisitions of businesses, net	-8	-4
Advances to issuer	0	0
Net cash used in investing activities	-37	-26
Cash flows from financing activities
Dividend by Acquisition Corp. to Holdings Corp.	-10	-10
Proceeds from the Revolving Credit Facility	100	155
Repayment of the Revolving Credit Facility	-100	-100
Repayment of Acquisition Corp. Senior Term Loan Facility	-3
Distribution to noncontrolling interest holder	0	-1
Change in due to (from) issuer	0	0
Net cash (used in) provided by financing activities	-13	44
Effect of exchange rate changes on cash and equivalents	-7	-2
Net decrease in cash and equivalents	-12	-26
Cash and equivalents at beginning of period	157	155
Cash and equivalents at end of period	145	129
WMG Holdings Corp. (issuer)
Cash flows from operating activities
Net (loss) income	-42	-37
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	0	0
Unrealized gains/losses and remeasurement of foreign denominated loans	0	0
Deferred income taxes	0	0
Non-cash interest expense	0	0
Non-cash share-based compensation expense	0	0
Equity losses (gains), including distributions	37	32
Changes in operating assets and liabilities:
Accounts receivable	0	0
Inventories	0	0
Royalty advances	0	0
Accounts payable and accrued liabilities	0	0
Royalty payables	0	0
Accrued interest	-5	-5
Deferred revenue	0	0
Other balance sheet changes	0	0
Net cash provided by (used in) operating activities	-10	-10
Cash flows from investing activities
Acquisition of music publishing rights, net	0	0
Capital expenditures	0	0
Investments and acquisitions of businesses, net	0	0
Advances to issuer	0	0
Net cash used in investing activities	0	0
Cash flows from financing activities
Dividend by Acquisition Corp. to Holdings Corp.	10	10
Proceeds from the Revolving Credit Facility	0	0
Repayment of the Revolving Credit Facility	0	0
Repayment of Acquisition Corp. Senior Term Loan Facility	0
Distribution to noncontrolling interest holder	0	0
Change in due to (from) issuer	0	0
Net cash (used in) provided by financing activities	10	10
Effect of exchange rate changes on cash and equivalents	0	0
Net decrease in cash and equivalents	0	0
Cash and equivalents at beginning of period	0	0
Cash and equivalents at end of period	0	0
Warner Music Group Corp.
Cash flows from operating activities
Net (loss) income	-42	-37
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	0	0
Unrealized gains/losses and remeasurement of foreign denominated loans	0	0
Deferred income taxes	0	0
Non-cash interest expense	0	0
Non-cash share-based compensation expense	0	0
Equity losses (gains), including distributions	42	37
Changes in operating assets and liabilities:
Accounts receivable	0	0
Inventories	0	0
Royalty advances	0	0
Accounts payable and accrued liabilities	0	0
Royalty payables	0	0
Accrued interest	0	0
Deferred revenue	0	0
Other balance sheet changes	0	0
Net cash provided by (used in) operating activities	0	0
Cash flows from investing activities
Acquisition of music publishing rights, net	0	0
Capital expenditures	0	0
Investments and acquisitions of businesses, net	0	0
Advances to issuer	0	0
Net cash used in investing activities	0	0
Cash flows from financing activities
Dividend by Acquisition Corp. to Holdings Corp.	0	0
Proceeds from the Revolving Credit Facility	0	0
Repayment of the Revolving Credit Facility	0	0
Repayment of Acquisition Corp. Senior Term Loan Facility	0
Distribution to noncontrolling interest holder	0	0
Change in due to (from) issuer	0	0
Net cash (used in) provided by financing activities	0	0
Effect of exchange rate changes on cash and equivalents	0	0
Net decrease in cash and equivalents	0	0
Cash and equivalents at beginning of period	0	0
Cash and equivalents at end of period	$0	$0