Description of Business	6 Months Ended
Mar. 31, 2017
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 New York Stock Exchange (“NYSE”). The Company continues to voluntarily 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”), as provided for in 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 marketing 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 Atlantic Records. 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. The Company also conducts its Recorded Music operations through a collection of additional record labels, including Asylum, Big Beat, Canvasback, Eastwest, Elektra, Erato, FFRR, Fueled by Ramen, Nonesuch, Parlophone, Reprise, Roadrunner, Sire, Warner Classics and Warner Music Nashville. Outside the United States, Recorded Music activities are conducted in more than 50 countries 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 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 guide artists with respect to their careers. 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; and various distribution centers and ventures operated internationally. 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 offered by digital streaming services such as Apple Music, Deezer, Napster, Spotify and YouTube, including digital radio services such as iHeart Radio, Pandora and Sirius XM. The Company has integrated the exploitation 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 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 has diversified 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 such as touring, merchandising and sponsorships. The Company has built artist services capabilities and platforms for exploiting this broader set of music-related rights and participating more widely in the monetization of the artist brands it helps create. The Company believes that entering into expanded-rights deals and enhancing its artist services capabilities in areas such as concert promotion and management have permitted it to diversify revenue streams and capitalize on other revenue opportunities. This provides for improved long-term relationships with artists and allows 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 are conducted principally through 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 70,000 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 Hallmark Entertainment and Disney Music Publishing. The Company has an extensive production music library collectively branded as Warner/Chappell Production Music.

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 New York Stock Exchange (“NYSE”). The Company continues to voluntarily 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”), as provided for in 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 marketing 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 Atlantic Records. 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. The Company also conducts its Recorded Music operations through a collection of additional record labels, including Asylum, Big Beat, Canvasback, Eastwest, Elektra, Erato, FFRR, Fueled by Ramen, Nonesuch, Parlophone, Reprise, Roadrunner, Sire, Warner Classics and Warner Music Nashville.

Outside the United States, Recorded Music activities are conducted in more than 50 countries 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 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 guide artists with respect to their careers.

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; and various distribution centers and ventures operated internationally.

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 offered by digital streaming services such as Apple Music, Deezer, Napster, Spotify and YouTube, including digital radio services such as iHeart Radio, Pandora and Sirius XM.

The Company has integrated the exploitation 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 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 has diversified 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 such as touring, merchandising and sponsorships. The Company has built artist services capabilities and platforms for exploiting this broader set of music-related rights and participating more widely in the monetization of the artist brands it helps create.

The Company believes that entering into expanded-rights deals and enhancing its artist services capabilities in areas such as concert promotion and management have permitted it to diversify revenue streams and capitalize on other revenue opportunities. This provides for improved long-term relationships with artists and allows 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 are conducted principally through 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 70,000 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 Hallmark Entertainment and Disney Music Publishing. The Company has an extensive production music library collectively branded as Warner/Chappell Production Music.