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Related Party Transactions (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Related Party Transaction [Line Items]      
Processing, administrative, and other fees $ 5,130 $ 4,883  
Amounts due from unconsolidated merchant alliances 3,935   $ 3,725
Affiliated entities      
Related Party Transaction [Line Items]      
Processing, administrative, and other fees 32 $ 40  
Amounts due from unconsolidated merchant alliances $ 28   $ 21