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Related Party Transactions (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Related Party Transaction [Line Items]      
Processing, administrative, and other fees $ 4,883 $ 4,547  
Amounts due from unconsolidated merchant alliances 3,574   $ 3,582
Affiliated entities      
Related Party Transaction [Line Items]      
Processing, administrative, and other fees 40 $ 46  
Amounts due from unconsolidated merchant alliances $ 38   $ 38