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Loans and Related Allowance for Credit Losses (Rollforward of Allowance for Credit Losses of Loans and Leases) (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | $ 2,742 | $ 2,629 |
Charge-offs | (618) | (442) |
Recoveries | 170 | 164 |
Net (charge-offs) | (448) | (278) |
Provision for credit losses | 3,172 | 369 |
Other | (1) |  |
Ending balance | 5,928 | 2,721 |
Off-Balance Sheet, Credit Loss, Liability [Roll Forward] |  |  |
Beginning balance | 318 |  |
Provision for (recapture of) credit losses | 165 |  |
Ending balance | 662 |  |
Allowance for credit loss | 6,590 |  |
Total commercial |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 1,812 | 1,663 |
Charge-offs | (205) | (84) |
Recoveries | 39 | 40 |
Net (charge-offs) | (166) | (44) |
Provision for credit losses | 2,039 | 187 |
Other | (1) |  |
Ending balance | 3,380 | 1,799 |
Off-Balance Sheet, Credit Loss, Liability [Roll Forward] |  |  |
Beginning balance | 316 |  |
Provision for (recapture of) credit losses | 179 |  |
Ending balance | 548 |  |
Allowance for credit loss | 3,928 |  |
Total consumer |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 930 | 966 |
Charge-offs | (413) | (358) |
Recoveries | 131 | 124 |
Net (charge-offs) | (282) | (234) |
Provision for credit losses | 1,133 | 182 |
Ending balance | 2,548 | $ 922 |
Off-Balance Sheet, Credit Loss, Liability [Roll Forward] |  |  |
Beginning balance | 2 |  |
Provision for (recapture of) credit losses | (14) |  |
Ending balance | 114 |  |
Allowance for credit loss | 2,662 |  |
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13 |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 463 |  |
Off-Balance Sheet, Credit Loss, Liability [Roll Forward] |  |  |
Beginning balance | 179 |  |
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13 | Total commercial |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | (304) |  |
Off-Balance Sheet, Credit Loss, Liability [Roll Forward] |  |  |
Beginning balance | 53 |  |
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13 | Total consumer |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 767 |  |
Off-Balance Sheet, Credit Loss, Liability [Roll Forward] |  |  |
Beginning balance | 126 |  |
Cumulative Effect, Period of Adoption, Adjusted Balance |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 3,205 |  |
Off-Balance Sheet, Credit Loss, Liability [Roll Forward] |  |  |
Beginning balance | 497 |  |
Allowance for credit loss | 6,590 |  | $ 3,702
Cumulative Effect, Period of Adoption, Adjusted Balance | Total commercial |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 1,508 |  |
Off-Balance Sheet, Credit Loss, Liability [Roll Forward] |  |  |
Beginning balance | 369 |  |
Cumulative Effect, Period of Adoption, Adjusted Balance | Total consumer |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 1,697 |  |
Off-Balance Sheet, Credit Loss, Liability [Roll Forward] |  |  |
Beginning balance | $ 128 |  |

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- Definition Amount, after recovery, of writeoff of financing receivable, charged against allowance for credit loss. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=118955255&loc=SL82922352-210448 + Details
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