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Derivatives - Derivatives Not Designated as Hedging Instruments (Details) MMBTU in Thousands, Boe in Thousands, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 USD ($) MMBTU Boe | Dec. 31, 2023 USD ($) Boe MMBTU
Derivative [Line Items] |  |
Gross amounts recognized | $ 622,238 | $ 610,920
Derivative liabilities - Fair value | $ 693,548 | $ 613,314
Crude oil |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, energy measure | Boe | 18,468 | 18,631
Natural gas |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, energy measure | MMBTU | 350,942 | 328,844
Customer-related positions: |  |
Derivative [Line Items] |  |
Notional amount | $ 10,791,750 | $ 11,362,194
Gross amounts recognized | 35,375 | 43,195
Derivative liabilities - Fair value | 490,627 | 419,499
Other economic hedges: |  |
Derivative [Line Items] |  |
Notional amount | 11,017,141 | 11,852,864
Gross amounts recognized | 494,211 | 433,969
Derivative liabilities - Fair value | 31,240 | 43,877
Interest rate contracts | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional amount | 8,442,370 | 8,681,085
Gross amounts recognized | 9,651 | 26,089
Derivative liabilities - Fair value | 458,240 | 394,625
Interest rate contracts | Other economic hedges: |  |
Derivative [Line Items] |  |
Notional amount | 8,468,092 | 8,706,824
Gross amounts recognized | 459,436 | 397,397
Derivative liabilities - Fair value | 10,474 | 26,187
Interest rate contracts | Swaps | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional amount | 6,874,132 | 6,835,822
Gross amounts recognized | 9,521 | 25,649
Derivative liabilities - Fair value | 442,960 | 377,388
Interest rate contracts | Swaps | Other economic hedges: |  |
Derivative [Line Items] |  |
Notional amount | 6,899,692 | 6,861,561
Gross amounts recognized | 444,094 | 380,123
Derivative liabilities - Fair value | 10,337 | 25,731
Interest rate contracts | Written options | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional amount | 1,287,121 | 1,522,531
Gross amounts recognized | 0 | 0
Derivative liabilities - Fair value | 11,909 | 12,756
Interest rate contracts | Collars and corridors | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional amount | 281,117 | 322,732
Gross amounts recognized | 130 | 440
Derivative liabilities - Fair value | 3,371 | 4,481
Interest rate contracts | Collars and corridors | Other economic hedges: |  |
Derivative [Line Items] |  |
Notional amount | 281,117 | 322,732
Gross amounts recognized | 3,380 | 4,491
Derivative liabilities - Fair value | 137 | 456
Interest rate contracts | Purchased options | Other economic hedges: |  |
Derivative [Line Items] |  |
Notional amount | 1,287,283 | 1,522,531
Gross amounts recognized | 11,962 | 12,783
Derivative liabilities - Fair value | 0 | 0
Foreign exchange contracts | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional amount | 2,349,380 | 2,681,109
Gross amounts recognized | 25,724 | 17,106
Derivative liabilities - Fair value | 32,387 | 24,874
Foreign exchange contracts | Other economic hedges: |  |
Derivative [Line Items] |  |
Notional amount | 2,549,049 | 3,146,040
Gross amounts recognized | 34,775 | 36,572
Derivative liabilities - Fair value | 20,766 | 17,690
Foreign exchange contracts | Swaps | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional amount | 1,577,082 | 1,588,491
Gross amounts recognized | 19,020 | 5,801
Derivative liabilities - Fair value | 24,839 | 18,118
Foreign exchange contracts | Swaps | Other economic hedges: |  |
Derivative [Line Items] |  |
Notional amount | 2,387,046 | 2,862,037
Gross amounts recognized | 34,733 | 36,280
Derivative liabilities - Fair value | 18,168 | 15,757
Foreign exchange contracts | Written options | Other economic hedges: |  |
Derivative [Line Items] |  |
Notional amount | 129,000 | 136,000
Gross amounts recognized | 0 | 0
Derivative liabilities - Fair value | 2,580 | 1,839
Foreign exchange contracts | Forwards and spot | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional amount | 643,298 | 956,618
Gross amounts recognized | 4,124 | 9,466
Derivative liabilities - Fair value | 7,548 | 6,756
Foreign exchange contracts | Forwards and spot | Other economic hedges: |  |
Derivative [Line Items] |  |
Notional amount | 33,003 | 148,003
Gross amounts recognized | 42 | 292
Derivative liabilities - Fair value | 18 | 94
Foreign exchange contracts | Purchased options | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional amount | 129,000 | 136,000
Gross amounts recognized | 2,580 | 1,839
Derivative liabilities - Fair value | 0 | 0
Commodity contracts | Customer-related positions: |  |
Derivative [Line Items] |  |
Gross amounts recognized | 29,495 | 6,014
Derivative liabilities - Fair value | 87,968 | 114,974
Commodity contracts | Customer-related positions: | Crude oil |  |
Derivative [Line Items] |  |
Gross amounts recognized | 27,271 | 5,555
Derivative liabilities - Fair value | $ 800 | $ 20,548
Derivative, nonmonetary notional amount, energy measure | Boe | 9,184 | 9,243
Commodity contracts | Customer-related positions: | Natural gas |  |
Derivative [Line Items] |  |
Gross amounts recognized | $ 2,224 | $ 459
Derivative liabilities - Fair value | $ 87,168 | $ 94,426
Derivative, nonmonetary notional amount, energy measure | MMBTU | 177,031 | 166,053
Commodity contracts | Other economic hedges: |  |
Derivative [Line Items] |  |
Gross amounts recognized | $ 47,120 | $ 73,590
Derivative liabilities - Fair value | 18,962 | 6,696
Commodity contracts | Other economic hedges: | Crude oil |  |
Derivative [Line Items] |  |
Gross amounts recognized | 1,789 | 10,851
Derivative liabilities - Fair value | $ 17,899 | $ 6,391
Derivative, nonmonetary notional amount, energy measure | Boe | 9,284 | 9,388
Commodity contracts | Other economic hedges: | Natural gas |  |
Derivative [Line Items] |  |
Gross amounts recognized | $ 45,331 | $ 62,739
Derivative liabilities - Fair value | $ 1,063 | $ 305
Derivative, nonmonetary notional amount, energy measure | MMBTU | 173,911 | 162,791
Commodity contracts | Swaps | Customer-related positions: | Crude oil |  |
Derivative [Line Items] |  |
Gross amounts recognized | $ 15,370 | $ 3,735
Derivative liabilities - Fair value | $ 685 | $ 15,445
Derivative, nonmonetary notional amount, energy measure | Boe | 3,608 | 3,277
Commodity contracts | Swaps | Customer-related positions: | Natural gas |  |
Derivative [Line Items] |  |
Gross amounts recognized | $ 1,420 | $ 438
Derivative liabilities - Fair value | $ 70,028 | $ 73,793
Derivative, nonmonetary notional amount, energy measure | MMBTU | 127,102 | 118,325
Commodity contracts | Swaps | Other economic hedges: | Crude oil |  |
Derivative [Line Items] |  |
Gross amounts recognized | $ 1,788 | $ 9,166
Derivative liabilities - Fair value | $ 12,997 | $ 4,924
Derivative, nonmonetary notional amount, energy measure | Boe | 3,708 | 3,422
Commodity contracts | Swaps | Other economic hedges: | Natural gas |  |
Derivative [Line Items] |  |
Gross amounts recognized | $ 37,170 | $ 49,941
Derivative liabilities - Fair value | $ 629 | $ 305
Derivative, nonmonetary notional amount, energy measure | MMBTU | 124,582 | 116,463
Commodity contracts | Written options | Customer-related positions: | Natural gas |  |
Derivative [Line Items] |  |
Gross amounts recognized | $ 132 | $ 0
Derivative liabilities - Fair value | $ 33 | $ 233
Derivative, nonmonetary notional amount, energy measure | MMBTU | 1,976 | 1,874
Commodity contracts | Purchased options | Other economic hedges: | Natural gas |  |
Derivative [Line Items] |  |
Gross amounts recognized | $ 41 | $ 233
Derivative liabilities - Fair value | $ 116 | $ 0
Derivative, nonmonetary notional amount, energy measure | MMBTU | 1,976 | 1,874
Commodity contracts | Collars | Customer-related positions: | Crude oil |  |
Derivative [Line Items] |  |
Gross amounts recognized | $ 11,901 | $ 1,820
Derivative liabilities - Fair value | $ 115 | $ 5,103
Derivative, nonmonetary notional amount, energy measure | Boe | 5,576 | 5,966
Commodity contracts | Collars | Customer-related positions: | Natural gas |  |
Derivative [Line Items] |  |
Gross amounts recognized | $ 672 | $ 21
Derivative liabilities - Fair value | $ 17,107 | $ 20,400
Derivative, nonmonetary notional amount, energy measure | MMBTU | 47,953 | 45,854
Commodity contracts | Collars | Other economic hedges: | Crude oil |  |
Derivative [Line Items] |  |
Gross amounts recognized | $ 1 | $ 1,685
Derivative liabilities - Fair value | $ 4,902 | $ 1,467
Derivative, nonmonetary notional amount, energy measure | Boe | 5,576 | 5,966
Commodity contracts | Collars | Other economic hedges: | Natural gas |  |
Derivative [Line Items] |  |
Gross amounts recognized | $ 8,120 | $ 12,565
Derivative liabilities - Fair value | $ 318 | $ 0
Derivative, nonmonetary notional amount, energy measure | MMBTU | 47,353 | 44,454

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