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Loans - Trouble Debt Restructurings (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Total Loans Modified | $ 2,252 | $ 812 | $ 1,489
Credit Card |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Total Loans Modified | $ 433 | $ 277 | $ 411
Credit Card | Reduced Interest Rate |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity | 100.00% | 100.00% | 100.00%
Average Rate Reduction | 19.73% | 21.15% | 20.61%
Consumer Banking |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Total Loans Modified | $ 1,077 | $ 374 | $ 541
Consumer Banking | Reduced Interest Rate |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity | 57.00% | 42.00% | 11.00%
Average Rate Reduction | 8.53% | 8.70% | 5.73%
Consumer Banking | Term Extension |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity | 97.00% | 93.00% | 94.00%
Average Term Extension (Months) | 4 months | 4 months | 3 months
Consumer Banking | Principal Forgiveness |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Financing Receivables, Impaired, Write-down Percentage of Troubled Debt Restructuring Activity |  | 0.00% | 0.00%
Gross Balance Reduction |  | $ 1 | $ 1
Consumer Banking | Auto |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Total Loans Modified | $ 1,070 | $ 371 | $ 536
Consumer Banking | Auto | Reduced Interest Rate |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity | 57.00% | 43.00% | 11.00%
Average Rate Reduction | 8.53% | 8.72% | 5.68%
Consumer Banking | Auto | Term Extension |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity | 97.00% | 93.00% | 95.00%
Average Term Extension (Months) | 4 months | 4 months | 3 months
Consumer Banking | Auto | Principal Forgiveness |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Financing Receivables, Impaired, Write-down Percentage of Troubled Debt Restructuring Activity |  | 0.00% | 0.00%
Gross Balance Reduction |  | $ 1 | $ 1
Consumer Banking | Retail banking |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Total Loans Modified | $ 7 | $ 3 | $ 5
Consumer Banking | Retail banking | Reduced Interest Rate |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity |  | 13.00% | 11.00%
Average Rate Reduction |  | 2.94% | 10.86%
Consumer Banking | Retail banking | Term Extension |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity | 92.00% | 30.00% | 20.00%
Average Term Extension (Months) | 13 months | 42 months | 8 months
Commercial Banking |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Total Loans Modified | $ 742 | $ 161 | $ 537
Commercial Banking | Reduced Interest Rate |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity | 4.00% | 6.00% | 3.00%
Average Rate Reduction | 0.28% | 1.19% | 0.14%
Commercial Banking | Term Extension |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity | 74.00% | 46.00% | 58.00%
Average Term Extension (Months) | 13 months | 9 months | 17 months
Commercial Banking | Principal Forgiveness |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity |  |  | 3.00%
Gross Balance Reduction |  |  | $ 7
Commercial Banking | Commercial and multifamily real estate |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Total Loans Modified | $ 385 | $ 49 | $ 98
Commercial Banking | Commercial and multifamily real estate | Reduced Interest Rate |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity | 8.00% | 21.00% |
Average Rate Reduction | 0.28% | 1.19% |
Commercial Banking | Commercial and multifamily real estate | Term Extension |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity | 84.00% | 85.00% | 86.00%
Average Term Extension (Months) | 13 months | 11 months | 5 months
Commercial Banking | Commercial And Industrial [Member] |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Total Loans Modified | $ 357 | $ 112 | $ 439
Commercial Banking | Commercial And Industrial [Member] | Reduced Interest Rate |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity |  |  | 4.00%
Average Rate Reduction |  |  | 0.14%
Commercial Banking | Commercial And Industrial [Member] | Term Extension |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity | 64.00% | 30.00% | 52.00%
Average Term Extension (Months) | 13 months | 6 months | 21 months
Commercial Banking | Commercial And Industrial [Member] | Principal Forgiveness |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity |  |  | 4.00%
Gross Balance Reduction |  |  | $ 7
Domestic credit card: | Credit Card |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Total Loans Modified | $ 306 | $ 154 | $ 243
Domestic credit card: | Credit Card | Reduced Interest Rate |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity | 100.00% | 100.00% | 100.00%
Average Rate Reduction | 16.54% | 15.90% | 15.94%
International card businesses: | Credit Card |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Total Loans Modified | $ 127 | $ 123 | $ 168
International card businesses: | Credit Card | Reduced Interest Rate |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
% of TDR Activity | 100.00% | 100.00% | 100.00%
Average Rate Reduction | 27.42% | 27.70% | 27.38%

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