v3.25.2
Revenue - Schedule of Disaggregation of Revenue (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Disaggregation of Revenue [Line Items]        
Net revenue $ 10,172 $ 8,900 $ 29,276 $ 26,309
U.S.        
Disaggregation of Revenue [Line Items]        
Net revenue 3,927 3,621 11,476 10,909
International        
Disaggregation of Revenue [Line Items]        
Net revenue 6,245 5,279 17,800 15,400
Service revenue        
Disaggregation of Revenue [Line Items]        
Net revenue 4,330 3,967 12,937 11,915
Data processing revenue        
Disaggregation of Revenue [Line Items]        
Net revenue 5,153 4,489 14,599 13,104
International transaction revenue        
Disaggregation of Revenue [Line Items]        
Net revenue 3,633 3,194 10,366 9,197
Other revenue        
Disaggregation of Revenue [Line Items]        
Net revenue 1,028 780 2,877 2,228
Client incentives        
Disaggregation of Revenue [Line Items]        
Net revenue $ (3,972) $ (3,530) $ (11,503) $ (10,135)