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Allowance for Credit Losses - Schedule of Allowance for Credit Losses (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Jan. 02, 2022 | Dec. 31, 2022 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Allowance for credit losses, beginning balance |  |  | $ 178 | $ 225 | $ 225
Initial PCD ACL |  | $ 272 |  |  | 2
Day 2 provision for loans and leases |  | 454 |  |  |
Provision for credit losses - loans and leases |  |  | 97 |  |
Total provision for credit losses- loans and leases |  |  | 551 | (37) | 58
Charge-offs |  |  | (146) | (36) | (45)
Recoveries |  |  | 67 | 26 | 23
Allowance for credit losses, ending balance |  | 922 | 922 | 178 | 225
Allowance for credit loss prior to acquisition date | $ 243 |  |  |  |
Adoption of ASC 326 |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Allowance for credit losses, beginning balance |  |  |  |  | (38)
Balance after adoption of ASC 326 |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Allowance for credit losses, beginning balance |  |  |  |  | 187
Commercial |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Allowance for credit losses, beginning balance |  |  | 80 | 92 | 150
Initial PCD ACL |  | 258 |  |  | 1
Day 2 provision for loans and leases |  | 432 |  |  |
Provision for credit losses - loans and leases |  |  | 101 |  |
Total provision for credit losses- loans and leases |  |  | 533 | (7) | 34
Charge-offs |  |  | (126) | (18) | (20)
Recoveries |  |  | 44 | 13 | 11
Allowance for credit losses, ending balance |  | 789 | 789 | 80 | 92
Commercial | Adoption of ASC 326 |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Allowance for credit losses, beginning balance |  |  |  |  | (84)
Commercial | Balance after adoption of ASC 326 |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Allowance for credit losses, beginning balance |  |  |  |  | 66
Consumer |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Allowance for credit losses, beginning balance |  |  | 98 | 133 | 75
Initial PCD ACL |  | 14 |  |  | 1
Day 2 provision for loans and leases |  | 22 |  |  |
(Benefit) for credit losses - loans and leases |  |  | (4) |  |
Total provision for credit losses- loans and leases |  |  | 18 | (30) | 24
Charge-offs |  |  | (20) | (18) | (25)
Recoveries |  |  | 23 | 13 | 12
Allowance for credit losses, ending balance |  | $ 133 | $ 133 | $ 98 | 133
Consumer | Adoption of ASC 326 |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Allowance for credit losses, beginning balance |  |  |  |  | 46
Consumer | Balance after adoption of ASC 326 |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Allowance for credit losses, beginning balance |  |  |  |  | $ 121

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- Definition Financing Receivable, Credit Loss, Expense + References No definition available. + Details
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- Definition Financing Receivable, Credit Loss, Reversal + References No definition available. + Details
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- Definition Financing Receivable, Excluding Accrued Interest, Purchased without Credit Deterioration, Allowance for Credit Loss at Acquisition Date + References No definition available. + Details
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- Definition Financing Receivable, Purchased with Credit Deterioration, Allowance for Credit Loss Prior Acquisition Date + References No definition available. + Details
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- Definition Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 + Details
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- Definition Amount, excluding accrued interest, of increase in allowance for credit loss on financing receivable from recovery. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 + Details
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- Definition Amount, excluding accrued interest, of allowance for credit loss at acquisition date of financing receivable purchased with credit deterioration. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 19 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919265-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 + Details
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- Definition Amount of credit loss expense (reversal of expense) for financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(11)) -URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
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