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Goodwill and Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Sep. 30, 2021
Finite Lived And Indefinite Lived Intangible Assets [Line Items] |  |
Total gross intangible asset subject to amortization | $ 4,613 | $ 4,125
Accumulated amortization | (2,141) | (2,108)
Total net intangible assets subject to amortization | 2,472 | 2,017
Intangible assets not subject to amortization: |  |
Trademarks and tradenames | 152 | 154
Total net intangible assets | 2,624 | 2,171
Trademarks and tradenames |  |
Intangible assets not subject to amortization: |  |
Trademarks and tradenames | $ 152 | 154
Recorded music catalog |  |
Finite Lived And Indefinite Lived Intangible Assets [Line Items] |  |
Weighted-Average Useful Life | 12 years |
Total gross intangible asset subject to amortization | $ 1,338 | 1,206
Music publishing copyrights |  |
Finite Lived And Indefinite Lived Intangible Assets [Line Items] |  |
Weighted-Average Useful Life | 25 years |
Total gross intangible asset subject to amortization | $ 2,005 | 1,730
Artist and songwriter contracts |  |
Finite Lived And Indefinite Lived Intangible Assets [Line Items] |  |
Weighted-Average Useful Life | 13 years |
Total gross intangible asset subject to amortization | $ 1,068 | 997
Trademarks |  |
Finite Lived And Indefinite Lived Intangible Assets [Line Items] |  |
Weighted-Average Useful Life | 14 years |
Total gross intangible asset subject to amortization | $ 106 | 96
Other intangible assets |  |
Finite Lived And Indefinite Lived Intangible Assets [Line Items] |  |
Weighted-Average Useful Life | 6 years |
Total gross intangible asset subject to amortization | $ 96 | $ 96

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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