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Loans and asset quality - Allowance for Credit Losses Activity (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Jun. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Beginning balance | $ 345 | $ 370 | $ 359 | $ 366 | $ 390 |
Charge-offs | (5) | (10) | (10) | (25) | (54) |
Recoveries | 1 | 5 | 0 | 7 | 0 |
Net (charge-offs) recoveries | (4) | (5) | (10) | (18) | (54) |
Provision | (6) | (20) | 22 | (13) | 35 |
Ending balance | 335 | 345 | 371 | 335 | 371 |
Allowance for loan losses | 272 | 275 | 296 | 272 | 296 | $ 294
Allowance for lending-related commitments | 63 | 70 | 75 | 63 | 75 | $ 72
Individually evaluated for impairment: |  |  |  |  |  |
Loan balance | 323 | 199 | 286 | 323 | 286 |
Allowance for loan losses | 42 | 52 | 64 | 42 | 64 |
Provision (benefit) for other credit losses | (1) | 3 | 1 | 7 | 15 |
Fair value of collateral | 350 | 169 | 291 | 350 | 291 |
Asset Pledged as Collateral |  |  |  |  |  |
Individually evaluated for impairment: |  |  |  |  |  |
Loan balance | 323 | 199 | 286 | 323 | 286 |
Commercial |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Beginning balance | 13 | 15 | 27 | 20 | 27 |
Charge-offs | 0 | 0 | 0 | 0 | 0 |
Recoveries | 0 | 0 | 0 | 0 | 0 |
Net (charge-offs) recoveries | 0 | 0 | 0 | 0 | 0 |
Provision | (6) | (2) | 3 | (13) | 3 |
Ending balance | 7 | 13 | 30 | 7 | 30 |
Allowance for loan losses | 1 | 2 | 16 | 1 | 16 |
Allowance for lending-related commitments | 6 | 11 | 14 | 6 | 14 |
Individually evaluated for impairment: |  |  |  |  |  |
Loan balance | 0 | 0 | 0 | 0 | 0 |
Allowance for loan losses | 0 | 0 | 0 | 0 | 0 |
Commercial real estate |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Beginning balance | 291 | 326 | 298 | 315 | 325 |
Charge-offs | (5) | (10) | (10) | (25) | (53) |
Recoveries | 0 | 5 | 0 | 5 | 0 |
Net (charge-offs) recoveries | (5) | (5) | (10) | (20) | (53) |
Provision | 4 | (30) | 20 | (5) | 36 |
Ending balance | 290 | 291 | 308 | 290 | 308 |
Allowance for loan losses | 247 | 245 | 258 | 247 | 258 |
Allowance for lending-related commitments | 43 | 46 | 50 | 43 | 50 |
Individually evaluated for impairment: |  |  |  |  |  |
Loan balance | 315 | 198 | 273 | 315 | 273 |
Allowance for loan losses | 42 | 52 | 64 | 42 | 64 |
Financial institutions |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Beginning balance | 25 | 16 | 21 | 19 | 19 |
Charge-offs | 0 | 0 | 0 | 0 | 0 |
Recoveries | 0 | 0 | 0 | 0 | 0 |
Net (charge-offs) recoveries | 0 | 0 | 0 | 0 | 0 |
Provision | (3) | 9 | 0 | 3 | 2 |
Ending balance | 22 | 25 | 21 | 22 | 21 |
Allowance for loan losses | 10 | 13 | 12 | 10 | 12 |
Allowance for lending-related commitments | 12 | 12 | 9 | 12 | 9 |
Individually evaluated for impairment: |  |  |  |  |  |
Loan balance | 0 | 0 | 0 | 0 | 0 |
Allowance for loan losses | 0 | 0 | 0 | 0 | 0 |
Lease financings |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  |  |  | 1 |
Charge-offs |  |  |  |  | 0 |
Recoveries |  |  |  |  | 0 |
Net (charge-offs) recoveries |  |  |  |  | 0 |
Provision |  |  |  |  | (1) |
Ending balance |  |  | 0 |  | 0 |
Wealth management loans |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Beginning balance | 1 | 1 | 1 | 1 | 1 |
Charge-offs | 0 | 0 | 0 | 0 | 0 |
Recoveries | 0 | 0 | 0 | 0 | 0 |
Net (charge-offs) recoveries | 0 | 0 | 0 | 0 | 0 |
Provision | 0 | 0 | 0 | 0 | 0 |
Ending balance | 1 | 1 | 1 | 1 | 1 |
Allowance for loan losses | 1 | 1 | 1 | 1 | 1 |
Allowance for lending-related commitments | 0 | 0 | 0 | 0 | 0 |
Individually evaluated for impairment: |  |  |  |  |  |
Loan balance | 0 | 0 | 0 | 0 | 0 |
Allowance for loan losses | 0 | 0 | 0 | 0 | 0 |
Wealth management mortgages |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Beginning balance | 6 | 6 | 6 | 6 | 9 |
Charge-offs | 0 | 0 | 0 | 0 | (1) |
Recoveries | 0 | 0 | 0 | 0 | 0 |
Net (charge-offs) recoveries | 0 | 0 | 0 | 0 | (1) |
Provision | 0 | 0 | 0 | 0 | (2) |
Ending balance | 6 | 6 | 6 | 6 | 6 |
Allowance for loan losses | 6 | 6 | 5 | 6 | 5 |
Allowance for lending-related commitments | 0 | 0 | 1 | 0 | 1 |
Individually evaluated for impairment: |  |  |  |  |  |
Loan balance | 8 | 1 | 13 | 8 | 13 |
Allowance for loan losses | 0 | 0 | 0 | 0 | 0 |
Other residential mortgages |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Beginning balance | 2 | 2 | 3 | 2 | 4 |
Charge-offs | 0 | 0 | 0 | 0 | 0 |
Recoveries | 1 | 0 | 0 | 2 | 0 |
Net (charge-offs) recoveries | 1 | 0 | 0 | 2 | 0 |
Provision | (1) | 0 | (1) | (2) | (2) |
Ending balance | 2 | 2 | 2 | 2 | 2 |
Allowance for loan losses | 2 | 2 | 2 | 2 | 2 |
Allowance for lending-related commitments | 0 | 0 | 0 | 0 | 0 |
Individually evaluated for impairment: |  |  |  |  |  |
Loan balance | 0 | 0 | 0 | 0 | 0 |
Allowance for loan losses | 0 | 0 | 0 | 0 | 0 |
Capital call financing |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |
Beginning balance | 7 | 4 | 3 | 3 | 4 |
Charge-offs | 0 | 0 | 0 | 0 | 0 |
Recoveries | 0 | 0 | 0 | 0 | 0 |
Net (charge-offs) recoveries | 0 | 0 | 0 | 0 | 0 |
Provision | 0 | 3 | 0 | 4 | (1) |
Ending balance | 7 | 7 | 3 | 7 | 3 |
Allowance for loan losses | 5 | 6 | 2 | 5 | 2 |
Allowance for lending-related commitments | 2 | 1 | 1 | 2 | 1 |
Individually evaluated for impairment: |  |  |  |  |  |
Loan balance | 0 | 0 | 0 | 0 | 0 |
Allowance for loan losses | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 |

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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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