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Loans - 90+ Day Delinquent Loans Accruing Interest and Nonperforming Loans (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
90 Days Past Due and Accruing | $ 2,407 | $ 2,233
Nonperforming Loans | $ 983 | $ 813
Percentage, 90 Days Past Due and Accruing | 0.90% | 0.90%
Percentage, Nonperforming Loans | 0.40% | 0.30%
Credit Card |  |
Financing Receivable, Past Due [Line Items] |  |
90 Days Past Due and Accruing | $ 2,407 | $ 2,233
Nonperforming Loans | 25 | 22
Credit Card | Domestic credit card |  |
Financing Receivable, Past Due [Line Items] |  |
90 Days Past Due and Accruing | 2,277 | 2,111
Credit Card | International card business |  |
Financing Receivable, Past Due [Line Items] |  |
90 Days Past Due and Accruing | 130 | 122
Nonperforming Loans | 25 | 22
Consumer Banking |  |
Financing Receivable, Past Due [Line Items] |  |
90 Days Past Due and Accruing | 0 | 0
Nonperforming Loans | 510 | 479
Consumer Banking | Auto |  |
Financing Receivable, Past Due [Line Items] |  |
90 Days Past Due and Accruing | 0 | 0
Nonperforming Loans | 487 | 449
Consumer Banking | Retail banking |  |
Financing Receivable, Past Due [Line Items] |  |
90 Days Past Due and Accruing | 0 | 0
Nonperforming Loans | 23 | 30
Commercial Banking |  |
Financing Receivable, Past Due [Line Items] |  |
90 Days Past Due and Accruing | 0 | 0
Nonperforming Loans | 448 | 312
Commercial Banking | Total commercial lending |  |
Financing Receivable, Past Due [Line Items] |  |
90 Days Past Due and Accruing | 0 | 0
Nonperforming Loans | 448 | 306
Commercial Banking | Commercial and multifamily real estate |  |
Financing Receivable, Past Due [Line Items] |  |
90 Days Past Due and Accruing | 0 | 0
Nonperforming Loans | 38 | 83
Commercial Banking | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
90 Days Past Due and Accruing | 0 | 0
Nonperforming Loans | 410 | 223
Commercial Banking | Small-ticket commercial real estate |  |
Financing Receivable, Past Due [Line Items] |  |
90 Days Past Due and Accruing | 0 | 0
Nonperforming Loans | $ 0 | $ 6

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