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Intangible Assets - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]        
Intangible amortization expense $ 362 $ 367 $ 1,092 $ 1,098