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Related Party Transactions (Details)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
USD ($)
affiliate
Jun. 30, 2019
USD ($)
Jun. 30, 2020
USD ($)
affiliate
Jun. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
Related Party Transaction [Line Items]          
Number of affiliates | affiliate 16   16    
Equity investments          
Related Party Transaction [Line Items]          
Amounts due from unconsolidated merchant alliances $ 37   $ 37   $ 35
Related Party Fees | Equity investments          
Related Party Transaction [Line Items]          
Processing, administrative, and other fees $ 55 $ 9 $ 112 $ 18  
Banc of America Merchant Services | Corporate joint venture          
Related Party Transaction [Line Items]          
Percentage of interest in joint venture 51.00%   51.00%    
Banc of America Merchant Services | Corporate joint venture | Bank of America          
Related Party Transaction [Line Items]          
Percentage of interest in joint venture 49.00%   49.00%    
Merchant Alliances | Related Party Fees | Equity investments          
Related Party Transaction [Line Items]          
Processing, administrative, and other fees $ 41   $ 87    
Lending Solutions Business and Investment Services Business | Related Party Fees | Affiliated entities          
Related Party Transaction [Line Items]          
Processing, administrative, and other fees $ 16 $ 9 $ 27 $ 18