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Loans - 90+ Day Delinquent Loans Accruing Interest and Nonperforming Loans (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Financing Receivable, Past Due [Line Items] |  |
90 Days Past Due and Accruing | $ 1,195 | $ 1,302
Nonperforming Loans | 1,100 | 995
Nonperforming Loans Without an Allowance | $ 529 | $ 449
Percentage, 90 Days Past Due and Accruing | 0.43% | 0.52%
Percentage, Nonperforming Loans | 0.40% | 0.40%
Percentage, Nonperforming Loans Without an Allowance | 0.19% | 0.18%
Interest income for loans classified as nonperforming | $ 43 | $ 39
Credit Card |  |
Financing Receivable, Past Due [Line Items] |  |
90 Days Past Due and Accruing | 1,192 | 1,251
Nonperforming Loans | 10 | 21
Nonperforming Loans Without an Allowance | 0 | 0
Credit Card | Domestic credit card: |  |
Financing Receivable, Past Due [Line Items] |  |
90 Days Past Due and Accruing | 1,110 | 1,169
Nonperforming Loans Without an Allowance | 0 | 0
Credit Card | International card businesses: |  |
Financing Receivable, Past Due [Line Items] |  |
90 Days Past Due and Accruing | 82 | 82
Nonperforming Loans | 10 | 21
Nonperforming Loans Without an Allowance | 0 | 0
Consumer Banking |  |
Financing Receivable, Past Due [Line Items] |  |
90 Days Past Due and Accruing | 0 | 0
Nonperforming Loans | 391 | 324
Nonperforming Loans Without an Allowance | 4 | 0
Consumer Banking | Auto |  |
Financing Receivable, Past Due [Line Items] |  |
90 Days Past Due and Accruing | 0 | 0
Nonperforming Loans | 344 | 294
Nonperforming Loans Without an Allowance | 0 | 0
Consumer Banking | Retail banking |  |
Financing Receivable, Past Due [Line Items] |  |
90 Days Past Due and Accruing | 0 | 0
Nonperforming Loans | 47 | 30
Nonperforming Loans Without an Allowance | 4 | 0
Commercial Banking |  |
Financing Receivable, Past Due [Line Items] |  |
90 Days Past Due and Accruing | 3 | 51
Nonperforming Loans | 699 | 650
Nonperforming Loans Without an Allowance | 525 | 449
Commercial Banking | Commercial and multifamily real estate |  |
Financing Receivable, Past Due [Line Items] |  |
90 Days Past Due and Accruing | 3 | 51
Nonperforming Loans | 383 | 200
Nonperforming Loans Without an Allowance | 268 | 184
Commercial Banking | Commercial And Industrial [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
90 Days Past Due and Accruing | 0 | 0
Nonperforming Loans | 316 | 450
Nonperforming Loans Without an Allowance | $ 257 | $ 265

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