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Loans and asset quality - Credit Risk Profile by Grade (Details) - USD ($) $ in Millions | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 | Dec. 31, 2024
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated, at amortized cost, current fiscal year | $ 12,569 | $ 9,744
Originated, at amortized cost, fiscal year before current fiscal year | 1,980 | 2,325
Originated, at amortized cost, two years before current fiscal year | 1,946 | 3,710
Originated, at amortized cost, three years before current fiscal year | 3,475 | 2,957
Originated, at amortized cost, four years before current fiscal year | 2,649 | 1,603
Originated, at amortized cost, more than five years before current fiscal year | 6,742 | 6,398
Amortized cost | 42,989 | 41,196
Converted to term loans – Amortized cost | 193 | 118
Total | 72,543 | 68,051
Accrued interest receivable | 297 | 336
Loans | 75,195 | 71,570
Total wealth management loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated, at amortized cost, current fiscal year | 11 | 3
Originated, at amortized cost, fiscal year before current fiscal year | 0 | 29
Originated, at amortized cost, two years before current fiscal year | 29 | 33
Originated, at amortized cost, three years before current fiscal year | 26 | 110
Originated, at amortized cost, four years before current fiscal year | 51 | 33
Originated, at amortized cost, more than five years before current fiscal year | 91 | 109
Amortized cost | 8,797 | 8,281
Converted to term loans – Amortized cost | 175 | 100
Total | 9,180 | 8,698
Accrued interest receivable | 57 | 50
Total wealth management loans | Wealth management mortgages |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated, at amortized cost, current fiscal year | 462 | 495
Originated, at amortized cost, fiscal year before current fiscal year | 276 | 798
Originated, at amortized cost, two years before current fiscal year | 766 | 1,585
Originated, at amortized cost, three years before current fiscal year | 1,514 | 1,812
Originated, at amortized cost, four years before current fiscal year | 1,747 | 818
Originated, at amortized cost, more than five years before current fiscal year | 3,927 | 3,423
Amortized cost | 15 | 19
Converted to term loans – Amortized cost | 0 | 0
Total | 8,707 | 8,950
Accrued interest receivable | 24 | 23
Writeoff | 1 |
Other residential mortgages |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated, at amortized cost, current fiscal year | 389 | 15
Originated, at amortized cost, fiscal year before current fiscal year | 357 | 148
Originated, at amortized cost, two years before current fiscal year | 173 | 529
Originated, at amortized cost, three years before current fiscal year | 501 | 184
Originated, at amortized cost, four years before current fiscal year | 175 | 5
Originated, at amortized cost, more than five years before current fiscal year | 172 | 187
Amortized cost | 0 | 0
Converted to term loans – Amortized cost | 0 | 0
Total | 1,767 | 1,068
Accrued interest receivable | 6 | 4
Loans | 1,767 | 1,068
Writeoff | 1 | 1
Capital call financing |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated, at amortized cost, current fiscal year | 230 | 91
Originated, at amortized cost, fiscal year before current fiscal year | 130 | 0
Originated, at amortized cost, two years before current fiscal year | 0 | 0
Originated, at amortized cost, three years before current fiscal year | 0 | 0
Originated, at amortized cost, four years before current fiscal year | 0 | 0
Originated, at amortized cost, more than five years before current fiscal year | 0 | 0
Amortized cost | 4,630 | 5,072
Converted to term loans – Amortized cost | 0 | 0
Total | 4,990 | 5,163
Accrued interest receivable | 24 | 28
Loans | 4,990 | 5,163
Other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated, at amortized cost, current fiscal year | 0 | 0
Originated, at amortized cost, fiscal year before current fiscal year | 0 | 0
Originated, at amortized cost, two years before current fiscal year | 0 | 0
Originated, at amortized cost, three years before current fiscal year | 0 | 0
Originated, at amortized cost, four years before current fiscal year | 0 | 0
Originated, at amortized cost, more than five years before current fiscal year | 0 | 0
Amortized cost | 3,584 | 3,063
Converted to term loans – Amortized cost | 0 | 0
Total | 3,584 | 3,063
Accrued interest receivable | 6 | 6
Loans | 3,584 | 3,063
Margin loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated, at amortized cost, current fiscal year | 10,452 | 7,732
Originated, at amortized cost, fiscal year before current fiscal year | 0 | 0
Originated, at amortized cost, two years before current fiscal year | 0 | 0
Originated, at amortized cost, three years before current fiscal year | 0 | 0
Originated, at amortized cost, four years before current fiscal year | 0 | 0
Originated, at amortized cost, more than five years before current fiscal year | 0 | 0
Amortized cost | 12,632 | 11,405
Converted to term loans – Amortized cost | 0 | 0
Total | 23,084 | 19,137
Accrued interest receivable | 35 | 38
Loans | 23,084 | 19,137
Overdrafts |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | $ 2,652 | $ 3,519
Overdraft repayment period | 2 days | 2 days
Overdrafts | Overdrafts |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | $ 2,652 | $ 3,519
Commercial Real Estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Writeoff |  | 82
Wealth management mortgages |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Writeoff |  | 1
Investment grade | Total wealth management loans | Loans receivable |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated, at amortized cost, current fiscal year | 11 | 3
Originated, at amortized cost, fiscal year before current fiscal year | 0 | 29
Originated, at amortized cost, two years before current fiscal year | 29 | 33
Originated, at amortized cost, three years before current fiscal year | 26 | 110
Originated, at amortized cost, four years before current fiscal year | 51 | 33
Originated, at amortized cost, more than five years before current fiscal year | 91 | 109
Amortized cost | 8,773 | 8,261
Converted to term loans – Amortized cost | 175 | 100
Total | 9,156 | 8,678
Non-investment grade | Total wealth management loans | Loans receivable |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated, at amortized cost, current fiscal year | 0 | 0
Originated, at amortized cost, fiscal year before current fiscal year | 0 | 0
Originated, at amortized cost, two years before current fiscal year | 0 | 0
Originated, at amortized cost, three years before current fiscal year | 0 | 0
Originated, at amortized cost, four years before current fiscal year | 0 | 0
Originated, at amortized cost, more than five years before current fiscal year | 0 | 0
Amortized cost | 24 | 20
Converted to term loans – Amortized cost | 0 | 0
Total | 24 | 20
Commercial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated, at amortized cost, current fiscal year | 25 | 55
Originated, at amortized cost, fiscal year before current fiscal year | 35 | 98
Originated, at amortized cost, two years before current fiscal year | 68 | 20
Originated, at amortized cost, three years before current fiscal year | 16 | 72
Originated, at amortized cost, four years before current fiscal year | 51 | 0
Originated, at amortized cost, more than five years before current fiscal year | 115 | 116
Amortized cost | 1,023 | 1,059
Converted to term loans – Amortized cost | 0 | 0
Total | 1,333 | 1,420
Accrued interest receivable | 1 | 2
Commercial | Investment grade |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated, at amortized cost, current fiscal year | 11 | 41
Originated, at amortized cost, fiscal year before current fiscal year | 24 | 69
Originated, at amortized cost, two years before current fiscal year | 54 | 20
Originated, at amortized cost, three years before current fiscal year | 16 | 55
Originated, at amortized cost, four years before current fiscal year | 51 | 0
Originated, at amortized cost, more than five years before current fiscal year | 115 | 116
Amortized cost | 998 | 1,010
Converted to term loans – Amortized cost | 0 | 0
Total | 1,269 | 1,311
Commercial | Non-investment grade |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated, at amortized cost, current fiscal year | 14 | 14
Originated, at amortized cost, fiscal year before current fiscal year | 11 | 29
Originated, at amortized cost, two years before current fiscal year | 14 | 0
Originated, at amortized cost, three years before current fiscal year | 0 | 17
Originated, at amortized cost, four years before current fiscal year | 0 | 0
Originated, at amortized cost, more than five years before current fiscal year | 0 | 0
Amortized cost | 25 | 49
Converted to term loans – Amortized cost | 0 | 0
Total | 64 | 109
Commercial real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated, at amortized cost, current fiscal year | 652 | 731
Originated, at amortized cost, fiscal year before current fiscal year | 759 | 882
Originated, at amortized cost, two years before current fiscal year | 835 | 1,513
Originated, at amortized cost, three years before current fiscal year | 1,408 | 743
Originated, at amortized cost, four years before current fiscal year | 593 | 674
Originated, at amortized cost, more than five years before current fiscal year | 2,309 | 2,001
Amortized cost | 193 | 220
Converted to term loans – Amortized cost | 18 | 18
Total | 6,767 | 6,782
Accrued interest receivable | 25 | 28
Writeoff | 25 |
Commercial real estate | Investment grade |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated, at amortized cost, current fiscal year | 503 | 396
Originated, at amortized cost, fiscal year before current fiscal year | 461 | 567
Originated, at amortized cost, two years before current fiscal year | 616 | 762
Originated, at amortized cost, three years before current fiscal year | 748 | 392
Originated, at amortized cost, four years before current fiscal year | 301 | 460
Originated, at amortized cost, more than five years before current fiscal year | 1,455 | 1,384
Amortized cost | 146 | 126
Converted to term loans – Amortized cost | 0 | 0
Total | 4,230 | 4,087
Commercial real estate | Non-investment grade |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated, at amortized cost, current fiscal year | 149 | 335
Originated, at amortized cost, fiscal year before current fiscal year | 298 | 315
Originated, at amortized cost, two years before current fiscal year | 219 | 751
Originated, at amortized cost, three years before current fiscal year | 660 | 351
Originated, at amortized cost, four years before current fiscal year | 292 | 214
Originated, at amortized cost, more than five years before current fiscal year | 854 | 617
Amortized cost | 47 | 94
Converted to term loans – Amortized cost | 18 | 18
Total | 2,537 | 2,695
Financial institutions |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated, at amortized cost, current fiscal year | 348 | 622
Originated, at amortized cost, fiscal year before current fiscal year | 423 | 370
Originated, at amortized cost, two years before current fiscal year | 75 | 30
Originated, at amortized cost, three years before current fiscal year | 10 | 26
Originated, at amortized cost, four years before current fiscal year | 25 | 42
Originated, at amortized cost, more than five years before current fiscal year | 42 | 0
Amortized cost | 12,115 | 12,077
Converted to term loans – Amortized cost | 0 | 0
Total | 13,038 | 13,167
Accrued interest receivable | 119 | 157
Financial institutions | Investment grade |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated, at amortized cost, current fiscal year | 295 | 491
Originated, at amortized cost, fiscal year before current fiscal year | 373 | 370
Originated, at amortized cost, two years before current fiscal year | 75 | 20
Originated, at amortized cost, three years before current fiscal year | 10 | 26
Originated, at amortized cost, four years before current fiscal year | 25 | 42
Originated, at amortized cost, more than five years before current fiscal year | 42 | 0
Amortized cost | 10,404 | 10,363
Converted to term loans – Amortized cost | 0 | 0
Total | 11,224 | 11,312
Financial institutions | Non-investment grade |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated, at amortized cost, current fiscal year | 53 | 131
Originated, at amortized cost, fiscal year before current fiscal year | 50 | 0
Originated, at amortized cost, two years before current fiscal year | 0 | 10
Originated, at amortized cost, three years before current fiscal year | 0 | 0
Originated, at amortized cost, four years before current fiscal year | 0 | 0
Originated, at amortized cost, more than five years before current fiscal year | 0 | 0
Amortized cost | 1,711 | 1,714
Converted to term loans – Amortized cost | 0 | 0
Total | 1,814 | 1,855
Lease financings |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated, at amortized cost, current fiscal year | 0 | 0
Originated, at amortized cost, fiscal year before current fiscal year | 0 | 0
Originated, at amortized cost, two years before current fiscal year | 0 | 0
Originated, at amortized cost, three years before current fiscal year | 0 | 10
Originated, at amortized cost, four years before current fiscal year | 7 | 31
Originated, at amortized cost, more than five years before current fiscal year | 86 | 562
Amortized cost | 0 | 0
Converted to term loans – Amortized cost | 0 | 0
Total | 93 | 603
Accrued interest receivable | $ 0 | $ 0

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