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)

v3.10.0.1
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 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Financing Receivable, Modifications [Line Items]        
Unpaid Principal Balance $ 102 $ 82 $ 245 $ 181
Carrying Value $ 101 $ 78 $ 243 $ 179
Pre-Modification Interest Rate 17.94% 15.64% 18.16% 16.57%
Post-Modification Interest Rate 5.12% 5.25% 5.19% 5.37%
Net charge-offs $ 16 $ 14 $ 38 $ 33
Direct/Indirect Consumer        
Financing Receivable, Modifications [Line Items]        
Unpaid Principal Balance 18 22 33 29
Carrying Value $ 10 $ 14 $ 19 $ 18
Pre-Modification Interest Rate 4.61% 4.92% 4.77% 4.99%
Post-Modification Interest Rate 4.50% 4.53% 4.58% 4.37%
United States | Credit Card Receivable        
Financing Receivable, Modifications [Line Items]        
Unpaid Principal Balance $ 84 $ 60 $ 212 $ 152
Carrying Value $ 91 $ 64 $ 224 $ 161
Pre-Modification Interest Rate 19.45% 17.96% 19.30% 17.88%
Post-Modification Interest Rate 5.19% 5.40% 5.24% 5.49%