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Loans and Related Allowance for Credit Losses (Financial Impact and TDRs by Concession Type) (Details) $ in Millions | 3 Months Ended
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Mar. 31, 2022 USD ($) customer
Financing Receivable [Line Items] |
Number of Loans | customer | 2,907
Pre-TDR Amortized Cost Basis | $ 89
Post-TDR Amortized Cost Basis | 79
Principal Forgiveness |
Financing Receivable [Line Items] |
Post-TDR Amortized Cost Basis |
Rate Reduction |
Financing Receivable [Line Items] |
Post-TDR Amortized Cost Basis | 26
Other |
Financing Receivable [Line Items] |
Post-TDR Amortized Cost Basis | $ 53
Total commercial |
Financing Receivable [Line Items] |
Number of Loans | customer | 12
Pre-TDR Amortized Cost Basis | $ 53
Post-TDR Amortized Cost Basis | 46
Total commercial | Principal Forgiveness |
Financing Receivable [Line Items] |
Post-TDR Amortized Cost Basis |
Total commercial | Rate Reduction |
Financing Receivable [Line Items] |
Post-TDR Amortized Cost Basis |
Total commercial | Other |
Financing Receivable [Line Items] |
Post-TDR Amortized Cost Basis | $ 46
Total consumer |
Financing Receivable [Line Items] |
Number of Loans | customer | 2,895
Pre-TDR Amortized Cost Basis | $ 36
Post-TDR Amortized Cost Basis | 33
Total consumer | Principal Forgiveness |
Financing Receivable [Line Items] |
Post-TDR Amortized Cost Basis |
Total consumer | Rate Reduction |
Financing Receivable [Line Items] |
Post-TDR Amortized Cost Basis | 26
Total consumer | Other |
Financing Receivable [Line Items] |
Post-TDR Amortized Cost Basis | $ 7

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- Definition Financing Receivable, Troubled Debt Restructuring, Premodification, Amortized Cost + References No definition available. + Details
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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 https://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524 + Details
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