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Fair value measurement - Assets and Liabilities on Recurring Basis (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Trading assets: |  |
Total derivatives fair value | $ 5,271 | $ 12,318
Effect of master netting agreements | (3,524) | (8,612)
Total derivative assets | 1,747 | 3,706
Trading assets | 13,625 | 13,981
Other assets | 1,608 | 2,151
Trading liabilities: |  |
Total derivatives fair value | 5,520 | 11,909
Effect of master netting agreements | (4,278) | (9,033)
Derivative liabilities | 1,242 | 2,876
Other liabilities | 872 | 422
Interest rate contracts |  |
Trading assets: |  |
Effect of master netting agreements | (675) | (835)
Trading liabilities: |  |
Effect of master netting agreements | (470) | (475)
Foreign exchange contracts |  |
Trading assets: |  |
Effect of master netting agreements | (2,836) | (7,698)
Trading liabilities: |  |
Effect of master netting agreements | (3,659) | (8,533)
Equity contracts |  |
Trading assets: |  |
Effect of master netting agreements | (13) | (79)
Trading liabilities: |  |
Effect of master netting agreements | (149) | (25)
Not designated as hedging |  |
Trading assets: |  |
Total derivatives fair value | 4,943 | 11,537
Trading liabilities: |  |
Total derivatives fair value | 5,163 | 11,897
Not designated as hedging | Interest rate contracts |  |
Trading assets: |  |
Total derivatives fair value | 759 | 835
Trading liabilities: |  |
Total derivatives fair value | 962 | 1,210
Not designated as hedging | Foreign exchange contracts |  |
Trading assets: |  |
Total derivatives fair value | 4,171 | 10,559
Trading liabilities: |  |
Total derivatives fair value | 4,015 | 10,636
Not designated as hedging | Equity contracts |  |
Trading assets: |  |
Total derivatives fair value | 13 | 143
Trading liabilities: |  |
Total derivatives fair value | 173 | 34
Designated as hedging |  |
Trading assets: |  |
Total derivatives fair value | 328 | 781
Trading liabilities: |  |
Total derivatives fair value | 357 | 12
Designated as hedging | Interest rate contracts |  |
Trading assets: |  |
Total derivatives fair value | 280 | 326
Trading liabilities: |  |
Total derivatives fair value | 0 | 0
Designated as hedging | Foreign exchange contracts |  |
Trading assets: |  |
Total derivatives fair value | 48 | 455
Trading liabilities: |  |
Total derivatives fair value | 357 | 12
Measured at fair value on a recurring basis | Operating segments |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 99,989 | 88,031
Trading assets: |  |
Debt instruments | 5,021 | 5,275
Equity instruments | 7,185 | 5,781
Effect of master netting agreements | (3,524) | (8,612)
Trading assets | 13,625 | 13,981
Other assets | 1,126 | 1,218
Total other assets | 1,454 | 1,999
Total assets | 115,222 | 104,163
Trading liabilities: |  |
Total trading liabilities | 3,499 | 4,865
Effect of master netting agreements | (4,278) | (9,033)
Derivative liabilities | 357 |
Other liabilities | 515 | 410
Total other liabilities | 872 | 422
Total liabilities | 4,371 | 5,287
Measured at fair value on a recurring basis | Operating segments | Non-U.S. government |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 28,495 | 24,747
Measured at fair value on a recurring basis | Operating segments | U.S. Treasury |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 24,226 | 16,403
Measured at fair value on a recurring basis | Operating segments | Agency residential mortgage-backed securities (“RMBS”) |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 21,017 | 19,900
Measured at fair value on a recurring basis | Operating segments | Foreign covered bonds |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 7,762 | 7,068
Measured at fair value on a recurring basis | Operating segments | Agency commercial mortgage-backed securities (“MBS”) |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 6,785 | 7,225
Measured at fair value on a recurring basis | Operating segments | Collateralized loan obligations (“CLOs”) |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 6,125 | 5,819
Measured at fair value on a recurring basis | Operating segments | Non-agency commercial MBS |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 2,210 | 2,487
Measured at fair value on a recurring basis | Operating segments | U.S. government agencies |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 1,560 | 2,289
Measured at fair value on a recurring basis | Operating segments | Non-agency RMBS |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 1,407 | 1,478
Measured at fair value on a recurring basis | Operating segments | Other asset-backed securities (“ABS”) |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 402 | 615
Measured at fair value on a recurring basis | Operating segments | Not designated as hedging |  |
Trading assets: |  |
Total derivative assets | 1,419 | 2,925
Trading liabilities: |  |
Derivative liabilities | 885 | 2,864
Measured at fair value on a recurring basis | Operating segments | Not designated as hedging | Interest rate contracts |  |
Trading assets: |  |
Total derivative assets | 759 | 835
Trading liabilities: |  |
Derivative liabilities | 962 | 1,210
Measured at fair value on a recurring basis | Operating segments | Not designated as hedging | Foreign exchange contracts |  |
Trading assets: |  |
Total derivative assets | 4,171 | 10,559
Trading liabilities: |  |
Derivative liabilities | 4,015 | 10,636
Measured at fair value on a recurring basis | Operating segments | Not designated as hedging | Equity contracts |  |
Trading assets: |  |
Total derivative assets | 13 | 143
Trading liabilities: |  |
Derivative liabilities | 186 | 51
Measured at fair value on a recurring basis | Operating segments | Designated as hedging |  |
Trading assets: |  |
Total derivative assets | 328 | 781
Trading liabilities: |  |
Derivative liabilities |  | 12
Measured at fair value on a recurring basis | Operating segments | Designated as hedging | Interest rate contracts |  |
Trading assets: |  |
Total derivative assets | 280 | 326
Measured at fair value on a recurring basis | Operating segments | Designated as hedging | Foreign exchange contracts |  |
Trading assets: |  |
Total derivative assets | 48 | 455
Trading liabilities: |  |
Derivative liabilities | 357 | 12
Measured at fair value on a recurring basis | Operating segments | Debt instruments |  |
Trading liabilities: |  |
Total trading liabilities | 2,538 | 1,949
Measured at fair value on a recurring basis | Operating segments | Equity instruments |  |
Trading liabilities: |  |
Total trading liabilities | 76 | 52
Measured at fair value on a recurring basis | Operating segments | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 31,261 | 21,183
Trading assets: |  |
Debt instruments | 1,914 | 2,268
Equity instruments | 7,185 | 5,781
Trading assets | 9,104 | 8,057
Other assets | 541 | 532
Total other assets | 541 | 532
Total assets | $ 40,906 | $ 29,772
Percentage of total assets prior to netting | 34.00% | 26.00%
Trading liabilities: |  |
Total trading liabilities | $ 2,535 | $ 1,992
Total derivatives fair value | 0 |
Other liabilities | 506 | 400
Total other liabilities | 506 | 400
Total liabilities | $ 3,041 | $ 2,392
Percentage of total liabilities prior to netting | 35.00% | 17.00%
Measured at fair value on a recurring basis | Operating segments | Level 1 | Non-U.S. government |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | $ 7,035 | $ 4,780
Measured at fair value on a recurring basis | Operating segments | Level 1 | U.S. Treasury |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 24,226 | 16,403
Measured at fair value on a recurring basis | Operating segments | Level 1 | Agency residential mortgage-backed securities (“RMBS”) |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 0 | 0
Measured at fair value on a recurring basis | Operating segments | Level 1 | Foreign covered bonds |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 0 | 0
Measured at fair value on a recurring basis | Operating segments | Level 1 | Agency commercial mortgage-backed securities (“MBS”) |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 0 | 0
Measured at fair value on a recurring basis | Operating segments | Level 1 | Collateralized loan obligations (“CLOs”) |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 0 | 0
Measured at fair value on a recurring basis | Operating segments | Level 1 | Non-agency commercial MBS |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 0 | 0
Measured at fair value on a recurring basis | Operating segments | Level 1 | U.S. government agencies |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 0 | 0
Measured at fair value on a recurring basis | Operating segments | Level 1 | Non-agency RMBS |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 0 | 0
Measured at fair value on a recurring basis | Operating segments | Level 1 | Other asset-backed securities (“ABS”) |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 0 | 0
Measured at fair value on a recurring basis | Operating segments | Level 1 | Not designated as hedging |  |
Trading assets: |  |
Total derivatives fair value | 5 | 8
Trading liabilities: |  |
Total derivatives fair value | 3 | 9
Measured at fair value on a recurring basis | Operating segments | Level 1 | Not designated as hedging | Interest rate contracts |  |
Trading assets: |  |
Total derivatives fair value | 5 | 2
Trading liabilities: |  |
Total derivatives fair value | 2 | 9
Measured at fair value on a recurring basis | Operating segments | Level 1 | Not designated as hedging | Foreign exchange contracts |  |
Trading assets: |  |
Total derivatives fair value | 0 | 0
Trading liabilities: |  |
Total derivatives fair value | 0 | 0
Measured at fair value on a recurring basis | Operating segments | Level 1 | Not designated as hedging | Equity contracts |  |
Trading assets: |  |
Total derivatives fair value | 0 | 6
Trading liabilities: |  |
Total derivatives fair value | 1 | 0
Measured at fair value on a recurring basis | Operating segments | Level 1 | Designated as hedging |  |
Trading assets: |  |
Total derivatives fair value | 0 | 0
Trading liabilities: |  |
Total derivatives fair value |  | 0
Measured at fair value on a recurring basis | Operating segments | Level 1 | Designated as hedging | Interest rate contracts |  |
Trading assets: |  |
Total derivatives fair value | 0 | 0
Measured at fair value on a recurring basis | Operating segments | Level 1 | Designated as hedging | Foreign exchange contracts |  |
Trading assets: |  |
Total derivatives fair value | 0 | 0
Trading liabilities: |  |
Total derivatives fair value | 0 | 0
Measured at fair value on a recurring basis | Operating segments | Level 1 | Debt instruments |  |
Trading liabilities: |  |
Total trading liabilities | 2,456 | 1,931
Measured at fair value on a recurring basis | Operating segments | Level 1 | Equity instruments |  |
Trading liabilities: |  |
Total trading liabilities | 76 | 52
Measured at fair value on a recurring basis | Operating segments | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 68,728 | 66,848
Trading assets: |  |
Debt instruments | 3,107 | 3,007
Equity instruments | 0 | 0
Trading assets | 8,045 | 14,536
Other assets | 585 | 686
Total other assets | 913 | 1,467
Total assets | $ 77,686 | $ 82,851
Percentage of total assets prior to netting | 66.00% | 74.00%
Trading liabilities: |  |
Total trading liabilities | $ 5,242 | $ 11,906
Total derivatives fair value | 357 |
Other liabilities | 9 | 10
Total other liabilities | 366 | 22
Total liabilities | $ 5,608 | $ 11,928
Percentage of total liabilities prior to netting | 65.00% | 83.00%
Measured at fair value on a recurring basis | Operating segments | Level 2 | Non-U.S. government |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | $ 21,460 | $ 19,967
Measured at fair value on a recurring basis | Operating segments | Level 2 | U.S. Treasury |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 0 | 0
Measured at fair value on a recurring basis | Operating segments | Level 2 | Agency residential mortgage-backed securities (“RMBS”) |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 21,017 | 19,900
Measured at fair value on a recurring basis | Operating segments | Level 2 | Foreign covered bonds |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 7,762 | 7,068
Measured at fair value on a recurring basis | Operating segments | Level 2 | Agency commercial mortgage-backed securities (“MBS”) |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 6,785 | 7,225
Measured at fair value on a recurring basis | Operating segments | Level 2 | Collateralized loan obligations (“CLOs”) |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 6,125 | 5,819
Measured at fair value on a recurring basis | Operating segments | Level 2 | Non-agency commercial MBS |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 2,210 | 2,487
Measured at fair value on a recurring basis | Operating segments | Level 2 | U.S. government agencies |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 1,560 | 2,289
Measured at fair value on a recurring basis | Operating segments | Level 2 | Non-agency RMBS |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 1,407 | 1,478
Measured at fair value on a recurring basis | Operating segments | Level 2 | Other asset-backed securities (“ABS”) |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 402 | 615
Measured at fair value on a recurring basis | Operating segments | Level 2 | Not designated as hedging |  |
Trading assets: |  |
Total derivatives fair value | 4,938 | 11,529
Trading liabilities: |  |
Total derivatives fair value | 5,160 | 11,888
Measured at fair value on a recurring basis | Operating segments | Level 2 | Not designated as hedging | Interest rate contracts |  |
Trading assets: |  |
Total derivatives fair value | 754 | 833
Trading liabilities: |  |
Total derivatives fair value | 960 | 1,201
Measured at fair value on a recurring basis | Operating segments | Level 2 | Not designated as hedging | Foreign exchange contracts |  |
Trading assets: |  |
Total derivatives fair value | 4,171 | 10,559
Trading liabilities: |  |
Total derivatives fair value | 4,015 | 10,636
Measured at fair value on a recurring basis | Operating segments | Level 2 | Not designated as hedging | Equity contracts |  |
Trading assets: |  |
Total derivatives fair value | 13 | 137
Trading liabilities: |  |
Total derivatives fair value | 185 | 51
Measured at fair value on a recurring basis | Operating segments | Level 2 | Designated as hedging |  |
Trading assets: |  |
Total derivatives fair value | 328 | 781
Trading liabilities: |  |
Total derivatives fair value |  | 12
Measured at fair value on a recurring basis | Operating segments | Level 2 | Designated as hedging | Interest rate contracts |  |
Trading assets: |  |
Total derivatives fair value | 280 | 326
Measured at fair value on a recurring basis | Operating segments | Level 2 | Designated as hedging | Foreign exchange contracts |  |
Trading assets: |  |
Total derivatives fair value | 48 | 455
Trading liabilities: |  |
Total derivatives fair value | 357 | 12
Measured at fair value on a recurring basis | Operating segments | Level 2 | Debt instruments |  |
Trading liabilities: |  |
Total trading liabilities | 82 | 18
Measured at fair value on a recurring basis | Operating segments | Level 2 | Equity instruments |  |
Trading liabilities: |  |
Total trading liabilities | 0 | 0
Measured at fair value on a recurring basis | Operating segments | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 0 | 0
Trading assets: |  |
Debt instruments | 0 | 0
Equity instruments | 0 | 0
Trading assets | 0 | 0
Other assets | 0 | 0
Total other assets | 0 | 0
Total assets | $ 0 | $ 0
Percentage of total assets prior to netting | 0.00% | 0.00%
Trading liabilities: |  |
Total trading liabilities | $ 0 | $ 0
Total derivatives fair value | 0 |
Other liabilities | 0 | 0
Total other liabilities | 0 | 0
Total liabilities | $ 0 | $ 0
Percentage of total liabilities prior to netting | 0.00% | 0.00%
Measured at fair value on a recurring basis | Operating segments | Level 3 | Non-U.S. government |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | $ 0 | $ 0
Measured at fair value on a recurring basis | Operating segments | Level 3 | U.S. Treasury |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 0 | 0
Measured at fair value on a recurring basis | Operating segments | Level 3 | Agency residential mortgage-backed securities (“RMBS”) |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 0 | 0
Measured at fair value on a recurring basis | Operating segments | Level 3 | Foreign covered bonds |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 0 | 0
Measured at fair value on a recurring basis | Operating segments | Level 3 | Agency commercial mortgage-backed securities (“MBS”) |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 0 | 0
Measured at fair value on a recurring basis | Operating segments | Level 3 | Collateralized loan obligations (“CLOs”) |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 0 | 0
Measured at fair value on a recurring basis | Operating segments | Level 3 | Non-agency commercial MBS |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 0 | 0
Measured at fair value on a recurring basis | Operating segments | Level 3 | U.S. government agencies |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 0 | 0
Measured at fair value on a recurring basis | Operating segments | Level 3 | Non-agency RMBS |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 0 | 0
Measured at fair value on a recurring basis | Operating segments | Level 3 | Other asset-backed securities (“ABS”) |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Fair value | 0 | 0
Measured at fair value on a recurring basis | Operating segments | Level 3 | Not designated as hedging |  |
Trading assets: |  |
Total derivatives fair value | 0 | 0
Trading liabilities: |  |
Total derivatives fair value | 0 | 0
Measured at fair value on a recurring basis | Operating segments | Level 3 | Not designated as hedging | Interest rate contracts |  |
Trading assets: |  |
Total derivatives fair value | 0 | 0
Trading liabilities: |  |
Total derivatives fair value | 0 | 0
Measured at fair value on a recurring basis | Operating segments | Level 3 | Not designated as hedging | Foreign exchange contracts |  |
Trading assets: |  |
Total derivatives fair value | 0 | 0
Trading liabilities: |  |
Total derivatives fair value | 0 | 0
Measured at fair value on a recurring basis | Operating segments | Level 3 | Not designated as hedging | Equity contracts |  |
Trading assets: |  |
Total derivatives fair value | 0 | 0
Trading liabilities: |  |
Total derivatives fair value | 0 | 0
Measured at fair value on a recurring basis | Operating segments | Level 3 | Designated as hedging |  |
Trading assets: |  |
Total derivatives fair value | 0 | 0
Trading liabilities: |  |
Total derivatives fair value |  | 0
Measured at fair value on a recurring basis | Operating segments | Level 3 | Designated as hedging | Interest rate contracts |  |
Trading assets: |  |
Total derivatives fair value | 0 | 0
Measured at fair value on a recurring basis | Operating segments | Level 3 | Designated as hedging | Foreign exchange contracts |  |
Trading assets: |  |
Total derivatives fair value | 0 | 0
Trading liabilities: |  |
Total derivatives fair value | 0 | 0
Measured at fair value on a recurring basis | Operating segments | Level 3 | Debt instruments |  |
Trading liabilities: |  |
Total trading liabilities | 0 | 0
Measured at fair value on a recurring basis | Operating segments | Level 3 | Equity instruments |  |
Trading liabilities: |  |
Total trading liabilities | 0 | 0
Measured at fair value on a recurring basis | Operating segments | NAV |  |
Trading assets: |  |
Assets measured at NAV | $ 154 | $ 152

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