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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 |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jun. 01, 2021 | Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Beginning balance |  | $ 4,714 | $ 3,944 | $ 5,361 | $ 2,742
Acquisition PCD reserves |  | 1,115 |  | 1,115 |
Charge-offs |  | (428) | (314) | (671) | (618)
Recoveries |  | 122 | 78 | 219 | 170
Net (charge-offs) |  | (306) | (236) | (452) | (448)
Provision for (recapture of) credit losses |  | 206 | 2,220 | (296) | 3,172
Other |  | 1 |  | 2 | (1)
Ending balance |  | 5,730 | 5,928 | 5,730 | 5,928
Off-Balance Sheet, Credit Loss, Liability [Roll Forward] |  |  |  |  |
Beginning balance |  | 507 | 450 | 584 | 318
Acquisition PCD reserves |  | 46 |  | 46 |
Provision for (recapture of) credit losses |  | 92 | 212 | 15 | 165
Ending balance |  | 645 | 662 | 645 | 662
Allowance for credit loss |  | 6,375 | 6,590 | 6,375 | 6,590
Allowances for investment securities and other financial assets |  | 138 | 51 | 138 | 51
BBVA USA Bancshares, Inc. |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Acquisition PCD reserves | $ 1,161 |  |  |  |
Net (charge-offs) |  | (248) |  | (248) |
Total commercial |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Beginning balance |  | 3,083 | 1,979 | 3,337 | 1,812
Acquisition PCD reserves |  | 828 |  | 828 |
Charge-offs |  | (274) | (122) | (343) | (205)
Recoveries |  | 34 | 15 | 52 | 39
Net (charge-offs) |  | (240) | (107) | (291) | (166)
Provision for (recapture of) credit losses |  | 140 | 1,508 | (64) | 2,039
Other |  | 1 |  | 2 | (1)
Ending balance |  | 3,812 | 3,380 | 3,812 | 3,380
Off-Balance Sheet, Credit Loss, Liability [Roll Forward] |  |  |  |  |
Beginning balance |  | 403 | 344 | 485 | 316
Acquisition PCD reserves |  | 43 |  | 43 |
Provision for (recapture of) credit losses |  | 87 | 204 | 5 | 179
Ending balance |  | 533 | 548 | 533 | 548
Allowance for credit loss |  | 4,345 | 3,928 | 4,345 | 3,928
Total consumer |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Beginning balance |  | 1,631 | 1,965 | 2,024 | 930
Acquisition PCD reserves |  | 287 |  | 287 |
Charge-offs |  | (154) | (192) | (328) | (413)
Recoveries |  | 88 | 63 | 167 | 131
Net (charge-offs) |  | (66) | (129) | (161) | (282)
Provision for (recapture of) credit losses |  | 66 | 712 | (232) | 1,133
Ending balance |  | 1,918 | 2,548 | 1,918 | 2,548
Off-Balance Sheet, Credit Loss, Liability [Roll Forward] |  |  |  |  |
Beginning balance |  | 104 | 106 | 99 | 2
Acquisition PCD reserves |  | 3 |  | 3 |
Provision for (recapture of) credit losses |  | 5 | 8 | 10 | (14)
Ending balance |  | 112 | 114 | 112 | 114
Allowance for credit loss |  | 2,030 | 2,662 | 2,030 | 2,662
Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |
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 | 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 | 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 |  | 4,714 | 3,944 | 5,361 | 3,205
Off-Balance Sheet, Credit Loss, Liability [Roll Forward] |  |  |  |  |
Beginning balance |  | 507 | 450 | 584 | 497
Cumulative Effect, Period of Adoption, Adjusted Balance | Total commercial |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Beginning balance |  | 3,083 | 1,979 | 3,337 | 1,508
Off-Balance Sheet, Credit Loss, Liability [Roll Forward] |  |  |  |  |
Beginning balance |  | 403 | 344 | 485 | 369
Cumulative Effect, Period of Adoption, Adjusted Balance | Total consumer |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Beginning balance |  | 1,631 | 1,965 | 2,024 | 1,697
Off-Balance Sheet, Credit Loss, Liability [Roll Forward] |  |  |  |  |
Beginning balance |  | $ 104 | $ 106 | $ 99 | $ 128

X
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- Definition Total allowance for credit losses related to loans, including the allowance for loan and lease losses and allowance for unfunded lending related commitments + References No definition available. + Details
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