XML 56 R121.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Related Party Transactions (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Merchant Alliances      
Related Party Transaction [Line Items]      
Amounts due from unconsolidated merchant alliances $ 35    
Merchant Alliances | Related Party Fees      
Related Party Transaction [Line Items]      
Processing, administrative service, and other fees $ 112 $ 28 $ 0
Banc of America Merchant Services | Joint Venture      
Related Party Transaction [Line Items]      
Percentage of interest in joint venture 51.00%