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Revenue (Tables)
 12 Months Ended
Sep. 30, 2024
Revenue from Contract with Customer [Abstract]  
Schedule of Disaggregation of Revenues
The nature, amount, timing and uncertainty of the Company’s revenue and cash flows and how they are affected by economic factors are most appropriately depicted through the Company’s revenue categories and geographical markets. The following tables disaggregate the Company’s net revenue by revenue category and by geography:
For the Years Ended
September 30,
202420232022
(in millions)
Service revenue
$16,114 $14,826 $13,361 
Data processing revenue
17,714 16,007 14,438 
International transaction revenue
12,665 11,638 9,815 
Other revenue
3,197 2,479 1,991 
Client incentives(13,764)(12,297)(10,295)
Net revenue
$35,926 $32,653 $29,310 
For the Years Ended
September 30,
202420232022
(in millions)
U.S.$14,780 $14,138 $12,851 
International21,146 18,515 16,459 
Net revenue
$35,926 $32,653 $29,310