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Derivatives - Derivatives Not Designated as Hedging Instruments (Details) MMBTU in Thousands, Boe in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2023 USD ($) Boe MMBTU | Dec. 31, 2022 USD ($) MMBTU Boe
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 610,920 | $ 755,328
Derivative liabilities - Fair Value | $ 613,314 | $ 887,264
Crude Oil |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, energy measure | Boe | 18,631 | 12,005
Natural Gas |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, energy measure | MMBTU | 328,844 | 247,704
Customer-related positions: |  |
Derivative [Line Items] |  |
Notional amount | $ 11,362,194 | $ 10,158,784
Derivative assets - Fair value | 43,195 | 27,146
Derivative liabilities - Fair Value | 419,499 | 592,060
Other economic hedges: |  |
Derivative [Line Items] |  |
Notional amount | 11,852,864 | 9,756,521
Derivative assets - Fair value | 433,969 | 447,201
Derivative liabilities - Fair Value | 43,877 | 16,886
Derivatives not designated as hedging instruments: |  |
Derivative [Line Items] |  |
Notional amount | 23,333,449 | 20,056,255
Derivative assets - Fair value | 557,105 | 736,283
Derivative liabilities - Fair Value | 600,190 | 867,577
Interest rate contracts | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional amount | 8,681,085 | 8,420,422
Derivative assets - Fair value | 26,089 | 1,438
Derivative liabilities - Fair Value | 394,625 | 561,547
Interest rate contracts | Other economic hedges: |  |
Derivative [Line Items] |  |
Notional amount | 8,706,824 | 8,511,992
Derivative assets - Fair value | 397,397 | 425,390
Derivative liabilities - Fair Value | 26,187 | 3,282
Interest rate contracts | Derivatives not designated as hedging instruments: |  |
Derivative [Line Items] |  |
Notional amount | 17,387,909 | 16,932,414
Derivative assets - Fair value | 423,486 | 426,828
Derivative liabilities - Fair Value | 420,812 | 564,829
Interest rate contracts | Swaps | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional amount | 6,835,822 | 6,656,491
Derivative assets - Fair value | 25,649 | 1,438
Derivative liabilities - Fair Value | 377,388 | 521,719
Interest rate contracts | Swaps | Other economic hedges: |  |
Derivative [Line Items] |  |
Notional amount | 6,861,561 | 6,683,828
Derivative assets - Fair value | 380,123 | 384,201
Derivative liabilities - Fair Value | 25,731 | 2,047
Interest rate contracts | Written options | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional amount | 1,522,531 | 1,548,158
Derivative assets - Fair value | 0 | 0
Derivative liabilities - Fair Value | 12,756 | 30,904
Interest rate contracts | Written options | Other economic hedges: |  |
Derivative [Line Items] |  |
Notional amount | 0 | 32,117
Derivative assets - Fair value | 0 | 0
Derivative liabilities - Fair Value | 0 | 1,235
Interest rate contracts | Collars and corridors | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional amount | 322,732 | 215,773
Derivative assets - Fair value | 440 | 0
Derivative liabilities - Fair Value | 4,481 | 8,924
Interest rate contracts | Collars and corridors | Other economic hedges: |  |
Derivative [Line Items] |  |
Notional amount | 322,732 | 215,772
Derivative assets - Fair value | 4,491 | 8,956
Derivative liabilities - Fair Value | 456 | 0
Interest rate contracts | Purchased options | Other economic hedges: |  |
Derivative [Line Items] |  |
Notional amount | 1,522,531 | 1,580,275
Derivative assets - Fair value | 12,783 | 32,233
Derivative liabilities - Fair Value | 0 | 0
Commodity contracts | Customer-related positions: |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | 6,014 | 171,082
Derivative liabilities - Fair Value | 114,974 | 100,333
Commodity contracts | Customer-related positions: | Crude Oil |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | 5,555 | 56,551
Derivative liabilities - Fair Value | $ 20,548 | $ 8,808
Derivative, nonmonetary notional amount, energy measure | Boe | 9,243 | 5,476
Commodity contracts | Customer-related positions: | Natural Gas |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 459 | $ 114,531
Derivative liabilities - Fair Value | $ 94,426 | $ 91,525
Derivative, nonmonetary notional amount, energy measure | MMBTU | 166,053 | 124,662
Commodity contracts | Other economic hedges: |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 73,590 | $ 90,531
Derivative liabilities - Fair Value | 6,696 | 158,275
Commodity contracts | Other economic hedges: | Crude Oil |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | 10,851 | 8,313
Derivative liabilities - Fair Value | $ 6,391 | $ 49,432
Derivative, nonmonetary notional amount, energy measure | Boe | 9,388 | 6,529
Commodity contracts | Other economic hedges: | Natural Gas |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 62,739 | $ 82,218
Derivative liabilities - Fair Value | $ 305 | $ 108,843
Derivative, nonmonetary notional amount, energy measure | MMBTU | 162,791 | 123,042
Commodity contracts | Derivatives not designated as hedging instruments: |  |
Derivative [Line Items] |  |
Notional amount | $ 0 | $ 0
Derivative assets - Fair value | 79,604 | 261,613
Derivative liabilities - Fair Value | 121,670 | 258,608
Commodity contracts | Swaps | Customer-related positions: | Crude Oil |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | 3,735 | 39,955
Derivative liabilities - Fair Value | $ 15,445 | $ 6,178
Derivative, nonmonetary notional amount, energy measure | Boe | 3,277 | 2,465
Commodity contracts | Swaps | Customer-related positions: | Natural Gas |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 438 | $ 112,314
Derivative liabilities - Fair Value | $ 73,793 | $ 73,208
Derivative, nonmonetary notional amount, energy measure | MMBTU | 118,325 | 92,590
Commodity contracts | Swaps | Other economic hedges: | Crude Oil |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 9,166 | $ 6,935
Derivative liabilities - Fair Value | $ 4,924 | $ 36,060
Derivative, nonmonetary notional amount, energy measure | Boe | 3,422 | 2,587
Commodity contracts | Swaps | Other economic hedges: | Natural Gas |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 49,941 | $ 69,767
Derivative liabilities - Fair Value | $ 305 | $ 106,883
Derivative, nonmonetary notional amount, energy measure | MMBTU | 116,463 | 91,900
Commodity contracts | Collars | Customer-related positions: | Crude Oil |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 1,820 | $ 16,038
Derivative liabilities - Fair Value | $ 5,103 | $ 2,630
Derivative, nonmonetary notional amount, energy measure | Boe | 5,966 | 3,011
Commodity contracts | Collars | Customer-related positions: | Natural Gas |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 21 | $ 2,217
Derivative liabilities - Fair Value | $ 20,400 | $ 18,317
Derivative, nonmonetary notional amount, energy measure | MMBTU | 45,854 | 32,072
Commodity contracts | Collars | Other economic hedges: | Crude Oil |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 1,685 | $ 1,378
Derivative liabilities - Fair Value | $ 1,467 | $ 12,856
Derivative, nonmonetary notional amount, energy measure | Boe | 5,966 | 3,942
Commodity contracts | Collars | Other economic hedges: | Natural Gas |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 12,565 | $ 12,451
Derivative liabilities - Fair Value | $ 0 | $ 1,960
Derivative, nonmonetary notional amount, energy measure | MMBTU | 44,454 | 31,142
Commodity contracts | Written options | Customer-related positions: | Crude Oil |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 0 | $ 558
Derivative liabilities - Fair Value | $ 0 | $ 0
Derivative, nonmonetary notional amount, energy measure | Boe | 0 | 0
Commodity contracts | Written options | Customer-related positions: | Natural Gas |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 0 | $ 0
Derivative liabilities - Fair Value | $ 233 | $ 0
Derivative, nonmonetary notional amount, energy measure | MMBTU | 1,874 | 0
Commodity contracts | Purchased options | Other economic hedges: | Crude Oil |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 0 | $ 0
Derivative liabilities - Fair Value | $ 0 | $ 516
Derivative, nonmonetary notional amount, energy measure | Boe | 0 | 0
Commodity contracts | Purchased options | Other economic hedges: | Natural Gas |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 233 | $ 0
Derivative liabilities - Fair Value | $ 0 | $ 0
Derivative, nonmonetary notional amount, energy measure | MMBTU | 1,874 | 0
Foreign exchange contracts | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional amount | $ 2,681,109 | $ 1,738,362
Derivative assets - Fair value | 17,106 | 25,708
Derivative liabilities - Fair Value | 24,874 | 30,513
Foreign exchange contracts | Other economic hedges: |  |
Derivative [Line Items] |  |
Notional amount | 3,146,040 | 1,244,529
Derivative assets - Fair value | 36,572 | 21,811
Derivative liabilities - Fair Value | 17,690 | 13,604
Foreign exchange contracts | Derivatives not designated as hedging instruments: |  |
Derivative [Line Items] |  |
Notional amount | 5,827,149 | 2,982,891
Derivative assets - Fair value | 53,678 | 47,519
Derivative liabilities - Fair Value | 42,564 | 44,117
Foreign exchange contracts | Swaps | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional amount | 1,588,491 | 623,143
Derivative assets - Fair value | 5,801 | 6,629
Derivative liabilities - Fair Value | 18,118 | 12,178
Foreign exchange contracts | Swaps | Other economic hedges: |  |
Derivative [Line Items] |  |
Notional amount | 2,862,037 | 1,044,900
Derivative assets - Fair value | 36,280 | 18,516
Derivative liabilities - Fair Value | 15,757 | 11,447
Foreign exchange contracts | Forwards and spot | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional amount | 956,618 | 993,588
Derivative assets - Fair value | 9,466 | 17,009
Derivative liabilities - Fair Value | 6,756 | 18,090
Foreign exchange contracts | Forwards and spot | Other economic hedges: |  |
Derivative [Line Items] |  |
Notional amount | 148,003 | 77,998
Derivative assets - Fair value | 292 | 3,050
Derivative liabilities - Fair Value | 94 | 87
Foreign exchange contracts | Other | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional amount | 136,000 | 121,631
Derivative assets - Fair value | 1,839 | 2,070
Derivative liabilities - Fair Value | 0 | 245
Foreign exchange contracts | Other | Other economic hedges: |  |
Derivative [Line Items] |  |
Notional amount | 136,000 | 121,631
Derivative assets - Fair value | 0 | 245
Derivative liabilities - Fair Value | 1,839 | 2,070
Credit Risk Contract | Derivatives not designated as hedging instruments: |  |
Derivative [Line Items] |  |
Notional amount | 118,391 | 140,950
Derivative assets - Fair value | 1 | 0
Derivative liabilities - Fair Value | 25 | 23
Credit Risk Contract | Derivatives not designated as hedging instruments: | RPAs - protection sold |  |
Derivative [Line Items] |  |
Notional amount | $ 25,000 | $ 0

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