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v3.20.2

Asset Quality (Financial Impact and TDRs by Concession Type) (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 USD ($) loans | Dec. 31, 2018 USD ($) loans | Dec. 31, 2017 USD ($) loans
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number of Loans | loans | 14,623 | 12,181 | 12,113
Pre-TDR Recorded Investment | $ 450 | $ 435 | $ 541
Post-TDR Recorded Investment | 413 | 398 | 495
Principal Forgiveness |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-TDR Recorded Investment |  | 3 | 18
Rate Reduction |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-TDR Recorded Investment | 108 | 153 | 153
Other |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-TDR Recorded Investment | $ 305 | $ 242 | $ 324
Total commercial lending |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number of Loans | loans | 75 | 85 | 120
Pre-TDR Recorded Investment | $ 278 | $ 272 | $ 293
Post-TDR Recorded Investment | 252 | 248 | 252
Total commercial lending | Principal Forgiveness |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-TDR Recorded Investment |  | 2 | 18
Total commercial lending | Rate Reduction |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-TDR Recorded Investment | 11 | 67 | 7
Total commercial lending | Other |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-TDR Recorded Investment | $ 241 | $ 179 | $ 227
Total consumer lending |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number of Loans | loans | 14,548 | 12,096 | 11,993
Pre-TDR Recorded Investment | $ 172 | $ 163 | $ 248
Post-TDR Recorded Investment | 161 | 150 | 243
Total consumer lending | Principal Forgiveness |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-TDR Recorded Investment |  | 1 |
Total consumer lending | Rate Reduction |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-TDR Recorded Investment | 97 | 86 | 146
Total consumer lending | Other |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-TDR Recorded Investment | $ 64 | $ 63 | $ 97

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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 + Details
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