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Derivative Instruments and Hedging Activities - Derivative Assets and Liabilities at Fair Value (Details) - USD ($) $ in Millions | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Notional or contractual amount | $ 249,275 | $ 213,069
Derivative assets, gross amount | 4,807 | 2,690
Derivative liabilities, gross amount | 6,175 | 1,868
Derivative asset, netting adjustments | (1,645) | (542)
Derivative liability, netting adjustments | (1,580) | (544)
Total derivative assets | 3,162 | 2,148
Total derivative liabilities | 4,595 | 1,324
Net valuation allowance on derivative assets and liabilities for non-performance risk | 6 | 11
Derivatives designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
Notional or contractual amount | 116,424 | 111,618
Derivative assets, gross amount | 589 | 326
Derivative liabilities, gross amount | 1,001 | 39
Derivatives designated as accounting hedges | Interest rate contracts |  |
Derivatives, Fair Value [Line Items] |  |
Notional or contractual amount | 109,216 | 102,059
Derivative assets, gross amount | 9 | 246
Derivative liabilities, gross amount | 687 | 19
Derivatives designated as accounting hedges | Interest rate contracts | Fair value hedges |  |
Derivatives, Fair Value [Line Items] |  |
Notional or contractual amount | 58,616 | 49,659
Derivative assets, gross amount | 8 | 2
Derivative liabilities, gross amount | 136 | 3
Derivatives designated as accounting hedges | Interest rate contracts | Cash flow hedges |  |
Derivatives, Fair Value [Line Items] |  |
Notional or contractual amount | 50,600 | 52,400
Derivative assets, gross amount | 1 | 244
Derivative liabilities, gross amount | 551 | 16
Derivatives designated as accounting hedges | Foreign exchange contracts |  |
Derivatives, Fair Value [Line Items] |  |
Notional or contractual amount | 7,208 | 9,559
Derivative assets, gross amount | 580 | 80
Derivative liabilities, gross amount | 314 | 20
Derivatives designated as accounting hedges | Foreign exchange contracts | Fair value hedges |  |
Derivatives, Fair Value [Line Items] |  |
Notional or contractual amount | 1,225 | 1,421
Derivative assets, gross amount | 0 | 13
Derivative liabilities, gross amount | 314 | 0
Derivatives designated as accounting hedges | Foreign exchange contracts | Cash flow hedges |  |
Derivatives, Fair Value [Line Items] |  |
Notional or contractual amount | 2,088 | 4,679
Derivative assets, gross amount | 102 | 24
Derivative liabilities, gross amount | 0 | 20
Derivatives designated as accounting hedges | Foreign exchange contracts | Net investment hedges |  |
Derivatives, Fair Value [Line Items] |  |
Notional or contractual amount | 3,895 | 3,459
Derivative assets, gross amount | 478 | 43
Derivative liabilities, gross amount | 0 | 0
Derivatives not designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
Notional or contractual amount | 132,851 | 101,451
Derivative assets, gross amount | 4,218 | 2,364
Derivative liabilities, gross amount | 5,174 | 1,829
Derivatives not designated as accounting hedges | Customer accommodation |  |
Derivatives, Fair Value [Line Items] |  |
Notional or contractual amount | 128,604 | 97,524
Derivative assets, gross amount | 4,171 | 2,329
Derivative liabilities, gross amount | 5,118 | 1,797
Derivatives not designated as accounting hedges | Interest rate contracts | Customer accommodation |  |
Derivatives, Fair Value [Line Items] |  |
Notional or contractual amount | 88,875 | 71,724
Derivative assets, gross amount | 879 | 620
Derivative liabilities, gross amount | 2,015 | 194
Derivatives not designated as accounting hedges | Interest rate contracts | Other interest rate exposures |  |
Derivatives, Fair Value [Line Items] |  |
Notional or contractual amount | 2,258 | 1,899
Derivative assets, gross amount | 38 | 33
Derivative liabilities, gross amount | 44 | 25
Derivatives not designated as accounting hedges | Foreign exchange contracts | Customer accommodation |  |
Derivatives, Fair Value [Line Items] |  |
Notional or contractual amount | 4,253 | 3,779
Derivative assets, gross amount | 141 | 40
Derivative liabilities, gross amount | 114 | 42
Derivatives not designated as accounting hedges | Commodity contracts | Customer accommodation |  |
Derivatives, Fair Value [Line Items] |  |
Notional or contractual amount | 35,476 | 22,021
Derivative assets, gross amount | 3,151 | 1,669
Derivative liabilities, gross amount | 2,989 | 1,561
Derivatives not designated as accounting hedges | Other contracts |  |
Derivatives, Fair Value [Line Items] |  |
Notional or contractual amount | 1,989 | 2,028
Derivative assets, gross amount | 9 | 2
Derivative liabilities, gross amount | $ 12 | $ 7

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