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Derivatives - Schedule of Derivatives Not Designated as Hedging Instruments (Details) MMBTU in Thousands, Boe in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2025 USD ($) MMBTU Boe | Dec. 31, 2024 USD ($) MMBTU Boe
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 409,467 | $ 523,133
Derivative liabilities - Fair value | 385,973 | 545,885
Customer-related positions: |  |
Derivative [Line Items] |  |
Notional Amount | 11,480,222 | 10,994,794
Derivative assets - Fair value | 84,692 | 39,718
Derivative liabilities - Fair value | 212,279 | 416,216
Economic hedges and other: |  |
Derivative [Line Items] |  |
Notional Amount | 12,057,156 | 11,212,047
Derivative assets - Fair value | 218,209 | 429,029
Derivative liabilities - Fair value | 87,612 | 33,999
Interest rate contracts | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional Amount | 9,474,603 | 8,493,839
Derivative assets - Fair value | 47,759 | 11,908
Derivative liabilities - Fair value | 208,714 | 366,649
Interest rate contracts | Economic hedges and other: |  |
Derivative [Line Items] |  |
Notional Amount | 9,512,674 | 8,511,542
Derivative assets - Fair value | 210,802 | 367,756
Derivative liabilities - Fair value | 48,017 | 12,312
Interest rate contracts | Swaps | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional Amount | 7,566,889 | 6,854,372
Derivative assets - Fair value | 47,448 | 11,828
Derivative liabilities - Fair value | 206,794 | 361,256
Interest rate contracts | Swaps | Economic hedges and other: |  |
Derivative [Line Items] |  |
Notional Amount | 7,604,959 | 6,872,075
Derivative assets - Fair value | 208,860 | 362,323
Derivative liabilities - Fair value | 47,682 | 12,228
Interest rate contracts | Written options | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional Amount | 1,463,110 | 1,458,428
Derivative assets - Fair value | 0 | 0
Derivative liabilities - Fair value | 1,900 | 4,953
Interest rate contracts | Collars and corridors | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional Amount | 444,604 | 181,039
Derivative assets - Fair value | 311 | 80
Derivative liabilities - Fair value | 20 | 440
Interest rate contracts | Collars and corridors | Economic hedges and other: |  |
Derivative [Line Items] |  |
Notional Amount | 444,605 | 181,039
Derivative assets - Fair value | 20 | 443
Derivative liabilities - Fair value | 335 | 84
Interest rate contracts | Purchased options | Economic hedges and other: |  |
Derivative [Line Items] |  |
Notional Amount | 1,463,110 | 1,458,428
Derivative assets - Fair value | 1,922 | 4,990
Derivative liabilities - Fair value | 0 | 0
Foreign exchange contracts | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional Amount | 2,005,619 | 2,500,955
Derivative assets - Fair value | 36,933 | 27,810
Derivative liabilities - Fair value | 3,565 | 49,567
Foreign exchange contracts | Economic hedges and other: |  |
Derivative [Line Items] |  |
Notional Amount | 2,544,482 | 2,700,505
Derivative assets - Fair value | 7,407 | 61,273
Derivative liabilities - Fair value | 39,595 | 21,687
Foreign exchange contracts | Forwards and spot | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional Amount | 1,156,203 | 996,486
Derivative assets - Fair value | 23,661 | 11,693
Derivative liabilities - Fair value | 2,831 | 24,201
Foreign exchange contracts | Forwards and spot | Economic hedges and other: |  |
Derivative [Line Items] |  |
Notional Amount | 234,278 | 86,750
Derivative assets - Fair value | 1,602 | 2,318
Derivative liabilities - Fair value | 3,498 | 1,738
Foreign exchange contracts | Swaps | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional Amount | 785,956 | 1,504,469
Derivative assets - Fair value | 13,272 | 16,117
Derivative liabilities - Fair value | 661 | 25,366
Foreign exchange contracts | Swaps | Economic hedges and other: |  |
Derivative [Line Items] |  |
Notional Amount | 2,246,744 | 2,613,755
Derivative assets - Fair value | 5,718 | 58,955
Derivative liabilities - Fair value | 36,083 | 19,949
Foreign exchange contracts | Written options | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional Amount | 63,460 | 0
Derivative assets - Fair value | 0 | 0
Derivative liabilities - Fair value | 73 | 0
Foreign exchange contracts | Purchased options | Economic hedges and other: |  |
Derivative [Line Items] |  |
Notional Amount | 63,460 | 0
Derivative assets - Fair value | 87 | 0
Derivative liabilities - Fair value | 14 | 0
Commodity contracts | Customer-related positions: |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | 7,919 | 25,609
Derivative liabilities - Fair value | 67,251 | 32,500
Commodity contracts | Customer-related positions: | Crude Oil |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | 226 | 6,286
Derivative liabilities - Fair value | $ 42,155 | $ 10,236
Derivative, nonmonetary notional amount, energy measure | Boe | 8,002 | 10,307
Commodity contracts | Customer-related positions: | Natural Gas |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 7,693 | $ 19,323
Derivative liabilities - Fair value | $ 25,096 | $ 22,264
Derivative, nonmonetary notional amount, energy measure | MMBTU | 184,544 | 205,015
Commodity contracts | Economic hedges and other: |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 58,103 | $ 22,890
Derivative liabilities - Fair value | 4,907 | 12,828
Commodity contracts | Economic hedges and other: | Crude Oil |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | 34,033 | 6,026
Derivative liabilities - Fair value | $ 32 | $ 3,969
Derivative, nonmonetary notional amount, energy measure | Boe | 8,002 | 10,307
Commodity contracts | Economic hedges and other: | Natural Gas |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 24,070 | $ 16,864
Derivative liabilities - Fair value | $ 4,875 | $ 8,859
Derivative, nonmonetary notional amount, energy measure | MMBTU | 179,471 | 201,711
Commodity contracts | Swaps | Customer-related positions: | Crude Oil |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 205 | $ 4,682
Derivative liabilities - Fair value | $ 28,533 | $ 6,874
Derivative, nonmonetary notional amount, energy measure | Boe | 4,255 | 4,830
Commodity contracts | Swaps | Customer-related positions: | Natural Gas |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 5,814 | $ 13,095
Derivative liabilities - Fair value | $ 18,403 | $ 17,708
Derivative, nonmonetary notional amount, energy measure | MMBTU | 112,599 | 141,736
Commodity contracts | Swaps | Economic hedges and other: | Crude Oil |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 25,309 | $ 4,479
Derivative liabilities - Fair value | $ 11 | $ 3,893
Derivative, nonmonetary notional amount, energy measure | Boe | 4,255 | 4,830
Commodity contracts | Swaps | Economic hedges and other: | Natural Gas |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 18,258 | $ 13,323
Derivative liabilities - Fair value | $ 3,963 | $ 5,056
Derivative, nonmonetary notional amount, energy measure | MMBTU | 110,506 | 139,136
Commodity contracts | Written options | Customer-related positions: | Natural Gas |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 0 | $ 167
Derivative liabilities - Fair value | $ 0 | $ 0
Derivative, nonmonetary notional amount, energy measure | MMBTU | 0 | 1,234
Commodity contracts | Collars | Customer-related positions: | Crude Oil |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 21 | $ 1,604
Derivative liabilities - Fair value | $ 13,622 | $ 3,362
Derivative, nonmonetary notional amount, energy measure | Boe | 3,747 | 5,477
Commodity contracts | Collars | Customer-related positions: | Natural Gas |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 1,879 | $ 6,061
Derivative liabilities - Fair value | $ 6,693 | $ 4,556
Derivative, nonmonetary notional amount, energy measure | MMBTU | 71,945 | 62,045
Commodity contracts | Collars | Economic hedges and other: | Crude Oil |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 8,724 | $ 1,547
Derivative liabilities - Fair value | $ 21 | $ 76
Derivative, nonmonetary notional amount, energy measure | Boe | 3,747 | 5,477
Commodity contracts | Collars | Economic hedges and other: | Natural Gas |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 5,812 | $ 3,541
Derivative liabilities - Fair value | $ 912 | $ 3,650
Derivative, nonmonetary notional amount, energy measure | MMBTU | 68,965 | 61,341
Commodity contracts | Purchased options | Economic hedges and other: | Natural Gas |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 0 | $ 0
Derivative liabilities - Fair value | $ 0 | $ 153
Derivative, nonmonetary notional amount, energy measure | MMBTU | 0 | 1,234

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