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Goodwill and Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Mar. 31, 2022 | Sep. 30, 2021
Finite Lived And Indefinite Lived Intangible Assets [Line Items] |  |
Total gross intangible asset subject to amortization | $ 4,596 | $ 4,125
Accumulated amortization | (2,185) | (2,108)
Total net intangible assets subject to amortization | 2,411 | 2,017
Intangible assets not subject to amortization: |  |
Trademarks and tradenames | 152 | 154
Total net intangible assets | 2,563 | 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 | $ 1,344 | 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 | $ 1,988 | 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 | $ 1,064 | 997
Trademarks |  |
Finite Lived And Indefinite Lived Intangible Assets [Line Items] |  |
Weighted-Average Useful Life | 15 years |
Total gross intangible asset subject to amortization | $ 105 | 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 | $ 95 | $ 96

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