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Derivatives, Fair Value of Derivatives Contracts (Details) - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Derivative Assets, Fair Value, Net [Abstract]    
Derviative contracts, net of cash collateral, Assets, Fair value $ 225,076 $ 410,304
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Fair Value, Net of Cash Collateral 287,509 587,473
Not Designated as Hedging Instrument [Member]    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 36,170,030 [1] 27,348,813 [2]
Derivative Liabilities, Notional 35,270,873 [1] 31,712,601 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 866,846 1,125,034
Derivative Assets, Netting Adjustments (497,665) (443,069)
Derivative Assets, Net Fair Value Before Cash Collateral 369,181 681,965
Derivative Assets, Cash Collateral (144,105) (271,661)
Derviative contracts, net of cash collateral, Assets, Fair value 225,076 410,304
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 849,760 1,218,900
Derivative Liabilities, Netting Adjustments (497,665) (443,069)
Derivative Liabilities, Net Fair Value Before Cash Collateral 352,095 775,831
Derivative Liabilities, Cash Collateral (64,586) (188,358)
Derivative Liabilities, Fair Value, Net of Cash Collateral 287,509 587,473
Not Designated as Hedging Instrument [Member] | Total customer risk management programs    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 10,474,223 [1] 10,658,981 [2]
Derivative Liabilities, Notional 10,853,848 [1] 11,066,201 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 776,586 998,792
Derivative Assets, Netting Adjustments (437,927) (405,958)
Derivative Assets, Net Fair Value Before Cash Collateral 338,659 592,834
Derivative Assets, Cash Collateral (142,585) (264,665)
Derviative contracts, net of cash collateral, Assets, Fair value 196,074 328,169
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 765,071 992,988
Derivative Liabilities, Netting Adjustments (437,927) (405,958)
Derivative Liabilities, Net Fair Value Before Cash Collateral 327,144 587,030
Derivative Liabilities, Cash Collateral (54,041) (6,441)
Derivative Liabilities, Fair Value, Net of Cash Collateral 273,103 580,589
Not Designated as Hedging Instrument [Member] | Interest rate contracts [Member]    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 2,964,667 [1] 2,754,476 [2]
Derivative Liabilities, Notional 2,964,667 [1] 2,754,476 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 109,692 108,450
Derivative Assets, Netting Adjustments (2,691) (6,810)
Derivative Assets, Net Fair Value Before Cash Collateral 107,001 101,640
Derivative Assets, Cash Collateral (103,743) (94,608)
Derviative contracts, net of cash collateral, Assets, Fair value 3,258 7,032
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 109,685 108,402
Derivative Liabilities, Netting Adjustments (2,691) (6,810)
Derivative Liabilities, Net Fair Value Before Cash Collateral 106,994 101,592
Derivative Liabilities, Cash Collateral 0 0
Derivative Liabilities, Fair Value, Net of Cash Collateral 106,994 101,592
Not Designated as Hedging Instrument [Member] | Energy contracts [Member]    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 7,472,357 [1] 7,846,190 [2]
Derivative Liabilities, Notional 7,851,998 [1] 8,254,004 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 631,285 836,425
Derivative Assets, Netting Adjustments (435,236) (399,148)
Derivative Assets, Net Fair Value Before Cash Collateral 196,049 437,277
Derivative Assets, Cash Collateral (38,770) (169,141)
Derviative contracts, net of cash collateral, Assets, Fair value 157,279 268,136
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 619,809 831,467
Derivative Liabilities, Netting Adjustments (435,236) (399,148)
Derivative Liabilities, Net Fair Value Before Cash Collateral 184,573 432,319
Derivative Liabilities, Cash Collateral (54,007) (6,441)
Derivative Liabilities, Fair Value, Net of Cash Collateral 130,566 425,878
Not Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member]    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 35,606 [1] 54,999 [2]
Derivative Liabilities, Notional 35,590 [1] 54,405 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 35,451 53,863
Derivative Assets, Netting Adjustments 0 0
Derivative Assets, Net Fair Value Before Cash Collateral 35,451 53,863
Derivative Assets, Cash Collateral (22) (872)
Derviative contracts, net of cash collateral, Assets, Fair value 35,429 52,991
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 35,419 53,065
Derivative Liabilities, Netting Adjustments 0 0
Derivative Liabilities, Net Fair Value Before Cash Collateral 35,419 53,065
Derivative Liabilities, Cash Collateral (34) 0
Derivative Liabilities, Fair Value, Net of Cash Collateral 35,385 53,065
Not Designated as Hedging Instrument [Member] | Equity option contracts [Member]    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 1,593 [1] 3,316 [2]
Derivative Liabilities, Notional 1,593 [1] 3,316 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 158 54
Derivative Assets, Netting Adjustments 0 0
Derivative Assets, Net Fair Value Before Cash Collateral 158 54
Derivative Assets, Cash Collateral (50) (44)
Derviative contracts, net of cash collateral, Assets, Fair value 108 10
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 158 54
Derivative Liabilities, Netting Adjustments 0 0
Derivative Liabilities, Net Fair Value Before Cash Collateral 158 54
Derivative Liabilities, Cash Collateral 0 0
Derivative Liabilities, Fair Value, Net of Cash Collateral 158 54
Not Designated as Hedging Instrument [Member] | Trading [Member]    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 25,238,831 [1] 16,264,818 [2]
Derivative Liabilities, Notional 24,337,408 [1] 20,644,156 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 82,976 118,545
Derivative Assets, Netting Adjustments (59,454) (37,111)
Derivative Assets, Net Fair Value Before Cash Collateral 23,522 81,434
Derivative Assets, Cash Collateral (1,520) (6,996)
Derviative contracts, net of cash collateral, Assets, Fair value 22,002 74,438
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 83,121 224,648
Derivative Liabilities, Netting Adjustments (59,454) (37,111)
Derivative Liabilities, Net Fair Value Before Cash Collateral 23,667 187,537
Derivative Liabilities, Cash Collateral (10,545) (181,917)
Derivative Liabilities, Fair Value, Net of Cash Collateral 13,122 5,620
Not Designated as Hedging Instrument [Member] | Internal risk management programs [Member]    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 456,976 [1] 425,014 [2]
Derivative Liabilities, Notional 79,617 [1] 2,244 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 7,284 7,697
Derivative Assets, Netting Adjustments (284) 0
Derivative Assets, Net Fair Value Before Cash Collateral 7,000 7,697
Derivative Assets, Cash Collateral 0 0
Derviative contracts, net of cash collateral, Assets, Fair value 7,000 7,697
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 1,568 1,264
Derivative Liabilities, Netting Adjustments (284) 0
Derivative Liabilities, Net Fair Value Before Cash Collateral 1,284 1,264
Derivative Liabilities, Cash Collateral 0 0
Derivative Liabilities, Fair Value, Net of Cash Collateral $ 1,284 $ 1,264
[1] Notional amounts for commodity contracts are converted into dollar-equivalent amounts based on dollar prices at the inception of the contract.
[2] Notional amounts for commodity contracts are converted into dollar-equivalent amounts based on dollar prices at the inception of the contract.