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Goodwill and Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($)
$ in Millions
Jun. 30, 2023
Sep. 30, 2022
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