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Property, Equipment and Technology, Net - Summary of Property, Equipment and Technology, Net (Detail) - USD ($)
$ in Millions
Sep. 30, 2023
Sep. 30, 2022
Property, Plant and Equipment [Line Items]    
Total property, equipment and technology $ 8,780 $ 8,881
Accumulated depreciation and amortization (5,355) (5,658)
Property, equipment and technology, net 3,425 3,223
Land    
Property, Plant and Equipment [Line Items]    
Total property, equipment and technology 71 72
Buildings and building improvements    
Property, Plant and Equipment [Line Items]    
Total property, equipment and technology 1,022 1,003
Furniture, equipment and leasehold improvements    
Property, Plant and Equipment [Line Items]    
Total property, equipment and technology 2,146 2,230
Construction-in-progress    
Property, Plant and Equipment [Line Items]    
Total property, equipment and technology 344 285
Technology    
Property, Plant and Equipment [Line Items]    
Total property, equipment and technology $ 5,197 $ 5,291