Quarterly report pursuant to Section 13 or 15(d)

Outstanding Loans and Leases - Credit Card and Other Consumer - TDRs Entered into During the Period (Details)

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Outstanding Loans and Leases - Credit Card and Other Consumer - TDRs Entered into During the Period (Details) - Credit card and other consumer - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Financing Receivable, Modifications [Line Items]    
Unpaid Principal Balance $ 116 $ 91
Carrying Value $ 115 $ 90
Pre-Modification Interest Rate 18.56% 17.24%
Post-Modification Interest Rate 5.19% 5.14%
Direct/Indirect Consumer    
Financing Receivable, Modifications [Line Items]    
Unpaid Principal Balance $ 18 $ 17
Carrying Value $ 10 $ 10
Pre-Modification Interest Rate 4.96% 4.98%
Post-Modification Interest Rate 4.96% 4.67%
United States | Credit Card Receivable    
Financing Receivable, Modifications [Line Items]    
Unpaid Principal Balance $ 98 $ 74
Carrying Value $ 105 $ 80
Pre-Modification Interest Rate 19.86% 18.83%
Post-Modification Interest Rate 5.21% 5.20%