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, 2019
Dec. 31, 2018
Dec. 31, 2017
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Unpaid Principal Balance $ 380 $ 320 $ 240
Carrying Value $ 376 $ 315 $ 235
Pre-Modification Interest Rate 18.42% 18.45% 17.17%
Post-Modification Interest Rate 5.34% 5.22% 5.22%
Direct/Indirect Consumer      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Unpaid Principal Balance $ 40 $ 42  
Carrying Value $ 21 $ 23  
Pre-Modification Interest Rate 5.23% 5.10%  
Post-Modification Interest Rate 5.21% 4.95%  
United States | Credit Card Receivable      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Unpaid Principal Balance $ 340 $ 278 $ 203
Carrying Value $ 355 $ 292 $ 213
Pre-Modification Interest Rate 19.18% 19.49% 18.47%
Post-Modification Interest Rate 5.35% 5.24% 5.32%
Non United States | Credit Card Receivable      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Unpaid Principal Balance     $ 37
Carrying Value     $ 22
Pre-Modification Interest Rate     4.81%
Post-Modification Interest Rate     4.30%