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Allowance for Credit Losses (Allowance for Credit Losses Methodology) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended | 36 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024 | Dec. 31, 2024
Allowance for credit losses on loans and leases |  |  |  |  |  |
Balance, beginning of period | $ 421 | $ 419 | $ 425 | $ 441 | $ 441 |
PCD ACL at acquisition | 5 |  | 5 |  |  |
Provision (recapture) for credit losses on loans and leases | 69 | 31 | 124 | 83 |  |
Charge-offs | (27) | (35) | (96) | (121) |  |
Recoveries | 5 | 5 | 15 | 17 |  |
Net charge-offs | (22) | (30) | (81) | (104) |  |
Balance, end of period | 473 | 420 | 473 | 420 | 425 | $ 425
Reserve for unfunded commitments |  |  |  |  |  |
Balance, beginning of period | 18 | 20 | 16 | 23 | 23 |
Recapture for credit losses on unfunded commitments | 1 | (2) | 3 | (5) |  |
Balance, end of period | 19 | 18 | 19 | 18 | 16 | 16
Total allowance for credit losses | 492 | 438 | 492 | 438 | 441 | 441
Commercial real estate |  |  |  |  |  |
Allowance for credit losses on loans and leases |  |  |  |  |  |
Balance, beginning of period | 160 | 143 | 154 | 126 | 126 |
PCD ACL at acquisition | 4 |  | 4 |  |  |
Provision (recapture) for credit losses on loans and leases | 44 | 15 | 50 | 32 |  |
Charge-offs | (3) | 0 | (3) | (1) |  |
Recoveries | 0 | 0 | 0 | 1 |  |
Net charge-offs | (3) | 0 | (3) | 0 |  |
Balance, end of period | 205 | 158 | 205 | 158 | 154 | 154
Reserve for unfunded commitments |  |  |  |  |  |
Balance, beginning of period | 8 | 10 | 6 | 11 | 11 |
Recapture for credit losses on unfunded commitments | 2 | (2) | 4 | (3) |  |
Balance, end of period | 10 | 8 | 10 | 8 | 6 | 6
Total allowance for credit losses | 215 | 166 | 215 | 166 |  |
Commercial |  |  |  |  |  |
Allowance for credit losses on loans and leases |  |  |  |  |  |
Balance, beginning of period | 220 | 220 | 219 | 245 | 245 |
PCD ACL at acquisition | 1 |  | 1 |  |  |
Provision (recapture) for credit losses on loans and leases | 22 | 17 | 80 | 63 |  |
Charge-offs | (22) | (33) | (88) | (113) |  |
Recoveries | 4 | 5 | 13 | 14 |  |
Net charge-offs | (18) | (28) | (75) | (99) |  |
Balance, end of period | 225 | 209 | 225 | 209 | 219 | 219
Reserve for unfunded commitments |  |  |  |  |  |
Balance, beginning of period | 8 | 7 | 7 | 8 | 8 |
Recapture for credit losses on unfunded commitments | (1) | 0 | 0 | (1) |  |
Balance, end of period | 7 | 7 | 7 | 7 | 7 | 7
Total allowance for credit losses | 232 | 216 | 232 | 216 |  |
Residential |  |  |  |  |  |
Allowance for credit losses on loans and leases |  |  |  |  |  |
Balance, beginning of period | 34 | 49 | 45 | 62 | 62 |
PCD ACL at acquisition | 0 |  | 0 |  |  |
Provision (recapture) for credit losses on loans and leases | 2 | (2) | (8) | (15) |  |
Charge-offs | 0 | (1) | (1) | (2) |  |
Recoveries | 0 | 0 | 0 | 1 |  |
Net charge-offs | 0 | (1) | (1) | (1) |  |
Balance, end of period | 36 | 46 | 36 | 46 | 45 | 45
Reserve for unfunded commitments |  |  |  |  |  |
Balance, beginning of period | 1 | 2 | 2 | 3 | 3 |
Recapture for credit losses on unfunded commitments | 0 | 0 | (1) | (1) |  |
Balance, end of period | 1 | 2 | 1 | 2 | 2 | 2
Total allowance for credit losses | 37 | 48 | 37 | 48 |  |
Consumer & other |  |  |  |  |  |
Allowance for credit losses on loans and leases |  |  |  |  |  |
Balance, beginning of period | 7 | 7 | 7 | 8 | 8 |
PCD ACL at acquisition | 0 |  | 0 |  |  |
Provision (recapture) for credit losses on loans and leases | 1 | 1 | 2 | 3 |  |
Charge-offs | (2) | (1) | (4) | (5) |  | (6)
Recoveries | 1 | 0 | 2 | 1 |  |
Net charge-offs | (1) | (1) | (2) | (4) |  |
Balance, end of period | 7 | 7 | 7 | 7 | 7 | 7
Reserve for unfunded commitments |  |  |  |  |  |
Balance, beginning of period | 1 | 1 | 1 | 1 | 1 |
Recapture for credit losses on unfunded commitments | 0 | 0 | 0 | 0 |  |
Balance, end of period | 1 | 1 | 1 | 1 | $ 1 | $ 1
Total allowance for credit losses | $ 8 | $ 8 | $ 8 | $ 8 |  |

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- Definition Financing Receivable, Allowance for Credit Loss and Unfunded Lending Commitments, Excluding Accrued Interest, Total + 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 -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-1 + 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 -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 + Details
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- Definition Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-6 + Details
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