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Loans - Trouble Debt Restructurings (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans Modified | $ 505 | $ 262
Credit Card |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans Modified | 96 | 83
Consumer Banking |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans Modified | 240 | 115
Consumer Banking | Auto |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans Modified | 239 | 115
Consumer Banking | Retail banking |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans Modified | 1 |
Commercial Banking |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans Modified | 169 | 64
Commercial Banking | Commercial And Industrial [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans Modified | 38 | 44
Commercial Banking | Commercial and multifamily real estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans Modified | $ 131 | $ 20
Reduced Interest Rate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
% of TDR Activity | 47.00% | 47.00%
Average Rate Reduction | 17.98% | 33.62%
Reduced Interest Rate | Credit Card |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
% of TDR Activity | 100.00% | 100.00%
Average Rate Reduction | 19.40% | 21.58%
Reduced Interest Rate | Consumer Banking |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
% of TDR Activity | 55.00% | 35.00%
Average Rate Reduction | 8.80% | 9.02%
Reduced Interest Rate | Consumer Banking | Auto |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
% of TDR Activity | 55.00% | 35.00%
Average Rate Reduction | 8.80% | 9.02%
Reduced Interest Rate | Consumer Banking | Retail banking |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
% of TDR Activity | 0.00% |
Average Rate Reduction | 0.00% |
Reduced Interest Rate | Commercial Banking |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
% of TDR Activity | 6.00% | 0.00%
Average Rate Reduction | 0.59% | 0.00%
Reduced Interest Rate | Commercial Banking | Commercial And Industrial [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
% of TDR Activity | 0.00% | 0.00%
Average Rate Reduction | 0.00% | 0.00%
Reduced Interest Rate | Commercial Banking | Commercial and multifamily real estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
% of TDR Activity | 7.00% | 0.00%
Average Rate Reduction | 0.59% | 0.00%
Term Extension |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
% of TDR Activity | 69.00% | 54.00%
Average Term Extension (Months) | 7 months | 5 months
Term Extension | Credit Card |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
% of TDR Activity | 0.00% | 0.00%
Average Term Extension (Months) | 0 months | 0 months
Term Extension | Consumer Banking |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
% of TDR Activity | 97.00% | 95.00%
Average Term Extension (Months) | 4 months | 3 months
Term Extension | Consumer Banking | Auto |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
% of TDR Activity | 97.00% | 95.00%
Average Term Extension (Months) | 4 months | 3 months
Term Extension | Consumer Banking | Retail banking |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
% of TDR Activity | 100.00% |
Average Term Extension (Months) | 6 months |
Term Extension | Commercial Banking |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
% of TDR Activity | 68.00% | 48.00%
Average Term Extension (Months) | 11 months | 10 months
Term Extension | Commercial Banking | Commercial And Industrial [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
% of TDR Activity | 86.00% | 25.00%
Average Term Extension (Months) | 10 months | 2 months
Term Extension | Commercial Banking | Commercial and multifamily real estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
% of TDR Activity | 62.00% | 100.00%
Average Term Extension (Months) | 12 months | 14 months
Domestic credit card: | Credit Card |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans Modified | $ 62 | $ 44
Domestic credit card: | Reduced Interest Rate | Credit Card |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
% of TDR Activity | 100.00% | 100.00%
Average Rate Reduction | 14.67% | 16.12%
Domestic credit card: | Term Extension | Credit Card |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
% of TDR Activity | 0.00% | 0.00%
Average Term Extension (Months) | 0 months | 0 months
International card businesses: | Credit Card |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans Modified | $ 34 | $ 39
International card businesses: | Reduced Interest Rate | Credit Card |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
% of TDR Activity | 100.00% | 100.00%
Average Rate Reduction | 28.00% | 27.74%
International card businesses: | Term Extension | Credit Card |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
% of TDR Activity | 0.00% | 0.00%
Average Term Extension (Months) | 0 months | 0 months

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