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 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Financing Receivable, Modifications [Line Items]        
Unpaid Principal Balance $ 114 $ 91 $ 211 $ 168
Carrying Value $ 113 $ 89 $ 210 $ 165
Pre-Modification Interest Rate 18.45% 17.29% 18.80% 17.63%
Post-Modification Interest Rate 5.36% 5.18% 5.30% 5.19%
Direct/Indirect Consumer        
Financing Receivable, Modifications [Line Items]        
Unpaid Principal Balance $ 19 $ 19 $ 27 $ 28
Carrying Value $ 11 $ 11 $ 15 $ 16
Pre-Modification Interest Rate 5.19% 4.43% 5.18% 4.73%
Post-Modification Interest Rate 5.16% 4.43% 5.16% 4.56%
United States | Credit Card Receivable        
Financing Receivable, Modifications [Line Items]        
Unpaid Principal Balance $ 95 $ 72 $ 184 $ 140
Carrying Value $ 102 $ 78 $ 195 $ 149
Pre-Modification Interest Rate 19.84% 19.18% 19.82% 19.06%
Post-Modification Interest Rate 5.38% 5.29% 5.32% 5.26%