Annual report pursuant to Section 13 and 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
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Financing Receivable, Modifications [Line Items]      
Unpaid Principal Balance $ 240 $ 250 $ 298
Carrying Value $ 235 $ 260 $ 316
Pre- Modification Interest Rate 17.17% 18.73% 18.58%
Post- Modification Interest Rate 5.22% 3.93% 3.84%
Net charge-offs $ 52 $ 74 $ 98
Direct/Indirect Consumer      
Financing Receivable, Modifications [Line Items]      
Unpaid Principal Balance 37 21 19
Carrying Value $ 22 $ 13 $ 12
Pre- Modification Interest Rate 4.81% 3.44% 5.95%
Post- Modification Interest Rate 4.30% 3.29% 5.19%
United States | Credit Card Receivable      
Financing Receivable, Modifications [Line Items]      
Unpaid Principal Balance $ 203 $ 163 $ 205
Carrying Value $ 213 $ 172 $ 218
Pre- Modification Interest Rate 18.47% 17.54% 17.07%
Post- Modification Interest Rate 5.32% 5.47% 5.08%
Non United States | Credit Card Receivable      
Financing Receivable, Modifications [Line Items]      
Unpaid Principal Balance   $ 66 $ 74
Carrying Value   $ 75 $ 86
Pre- Modification Interest Rate   23.99% 24.05%
Post- Modification Interest Rate   0.52% 0.53%