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Goodwill and Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($) $ in Millions | Jun. 30, 2023 | Sep. 30, 2022
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Finite Lived And Indefinite Lived Intangible Assets [Line Items] |  |
Total gross intangible assets subject to amortization | $ 4,660 | $ 4,411
Accumulated amortization | (2,465) | (2,172)
Total net intangible assets subject to amortization | 2,195 | 2,239
Intangible assets not subject to amortization: |  |
Trademarks and tradenames | 150 | 145
Total net intangible assets | 2,345 | 2,384
Trademarks and tradenames |  |
Intangible assets not subject to amortization: |  |
Trademarks and tradenames | $ 150 | 145
Recorded music catalog |  |
Finite Lived And Indefinite Lived Intangible Assets [Line Items] |  |
Weighted-Average Useful Life | 12 years |
Total gross intangible assets subject to amortization | $ 1,397 | 1,316
Music publishing copyrights |  |
Finite Lived And Indefinite Lived Intangible Assets [Line Items] |  |
Weighted-Average Useful Life | 25 years |
Total gross intangible assets subject to amortization | $ 1,995 | 1,889
Artist and songwriter contracts |  |
Finite Lived And Indefinite Lived Intangible Assets [Line Items] |  |
Weighted-Average Useful Life | 13 years |
Total gross intangible assets subject to amortization | $ 1,056 | 1,014
Trademarks |  |
Finite Lived And Indefinite Lived Intangible Assets [Line Items] |  |
Weighted-Average Useful Life | 14 years |
Total gross intangible assets subject to amortization | $ 109 | 103
Other intangible assets |  |
Finite Lived And Indefinite Lived Intangible Assets [Line Items] |  |
Weighted-Average Useful Life | 6 years |
Total gross intangible assets subject to amortization | $ 103 | $ 89

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