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Related Party Transactions (Details)
$ in Millions
3 Months Ended
Mar. 31, 2020
USD ($)
affiliate
Mar. 31, 2019
USD ($)
Dec. 31, 2019
USD ($)
Related Party Transaction [Line Items]      
Number of affiliates | affiliate 17    
Equity investments      
Related Party Transaction [Line Items]      
Amounts due from unconsolidated merchant alliances $ 29   $ 35
Related Party Fees | Equity investments      
Related Party Transaction [Line Items]      
Processing, administrative, and other fees $ 57 $ 9  
Banc of America Merchant Services | Corporate joint venture      
Related Party Transaction [Line Items]      
Percentage of interest in joint venture 51.00%    
Merchant Alliances | Related Party Fees | Equity investments      
Related Party Transaction [Line Items]      
Processing, administrative, and other fees $ 46    
Lending Solutions Business and Investment Services Business | Related Party Fees | Affiliated entities      
Related Party Transaction [Line Items]      
Processing, administrative, and other fees $ 11 $ 9