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Derivatives, Fair Value of Derivatives Contracts (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Derivative Assets, Fair Value, Net [Abstract]    
Derviative contracts, net of cash collateral, Assets, Fair value $ 334,382 $ 410,304
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Fair Value, Net of Cash Collateral 402,559 587,473
Not Designated as Hedging Instrument [Member]    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 33,192,701 [1] 27,348,813 [2]
Derivative Liabilities, Notional 33,302,224 [1] 31,712,601 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 817,361 1,125,034
Derivative Assets, Netting Adjustments (371,292) (443,069)
Derivative Assets, Net Fair Value Before Cash Collateral 446,069 681,965
Derivative Assets, Cash Collateral (111,687) (271,661)
Derviative contracts, net of cash collateral, Assets, Fair value 334,382 410,304
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 789,500 1,218,900
Derivative Liabilities, Netting Adjustments (371,292) (443,069)
Derivative Liabilities, Net Fair Value Before Cash Collateral 418,208 775,831
Derivative Liabilities, Cash Collateral (15,649) (188,358)
Derivative Liabilities, Fair Value, Net of Cash Collateral 402,559 587,473
Not Designated as Hedging Instrument [Member] | Total customer risk management programs    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 10,141,048 [1] 10,658,981 [2]
Derivative Liabilities, Notional 10,093,831 [1] 11,066,201 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 734,458 998,792
Derivative Assets, Netting Adjustments (319,622) (405,958)
Derivative Assets, Net Fair Value Before Cash Collateral 414,836 592,834
Derivative Assets, Cash Collateral (108,582) (264,665)
Derviative contracts, net of cash collateral, Assets, Fair value 306,254 328,169
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 712,457 992,988
Derivative Liabilities, Netting Adjustments (319,622) (405,958)
Derivative Liabilities, Net Fair Value Before Cash Collateral 392,835 587,030
Derivative Liabilities, Cash Collateral (118) (6,441)
Derivative Liabilities, Fair Value, Net of Cash Collateral 392,717 580,589
Not Designated as Hedging Instrument [Member] | Interest rate contracts [Member]    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 3,044,422 [1] 2,754,476 [2]
Derivative Liabilities, Notional 3,044,422 [1] 2,754,476 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 78,868 108,450
Derivative Assets, Netting Adjustments (21,609) (6,810)
Derivative Assets, Net Fair Value Before Cash Collateral 57,259 101,640
Derivative Assets, Cash Collateral (34,677) (94,608)
Derviative contracts, net of cash collateral, Assets, Fair value 22,582 7,032
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 78,694 108,402
Derivative Liabilities, Netting Adjustments (21,609) (6,810)
Derivative Liabilities, Net Fair Value Before Cash Collateral 57,085 101,592
Derivative Liabilities, Cash Collateral 0 0
Derivative Liabilities, Fair Value, Net of Cash Collateral 57,085 101,592
Not Designated as Hedging Instrument [Member] | Energy contracts [Member]    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 7,026,833 [1] 7,846,190 [2]
Derivative Liabilities, Notional 6,979,686 [1] 8,254,004 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 587,825 836,425
Derivative Assets, Netting Adjustments (298,013) (399,148)
Derivative Assets, Net Fair Value Before Cash Collateral 289,812 437,277
Derivative Assets, Cash Collateral (73,855) (169,141)
Derviative contracts, net of cash collateral, Assets, Fair value 215,957 268,136
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 566,078 831,467
Derivative Liabilities, Netting Adjustments (298,013) (399,148)
Derivative Liabilities, Net Fair Value Before Cash Collateral 268,065 432,319
Derivative Liabilities, Cash Collateral (53) (6,441)
Derivative Liabilities, Fair Value, Net of Cash Collateral 268,012 425,878
Not Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member]    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 68,200 [1] 54,999 [2]
Derivative Liabilities, Notional 68,130 [1] 54,405 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 67,590 53,863
Derivative Assets, Netting Adjustments 0 0
Derivative Assets, Net Fair Value Before Cash Collateral 67,590 53,863
Derivative Assets, Cash Collateral 0 (872)
Derviative contracts, net of cash collateral, Assets, Fair value 67,590 52,991
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 67,510 53,065
Derivative Liabilities, Netting Adjustments 0 0
Derivative Liabilities, Net Fair Value Before Cash Collateral 67,510 53,065
Derivative Liabilities, Cash Collateral (65) 0
Derivative Liabilities, Fair Value, Net of Cash Collateral 67,445 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 175 54
Derivative Assets, Netting Adjustments 0 0
Derivative Assets, Net Fair Value Before Cash Collateral 175 54
Derivative Assets, Cash Collateral (50) (44)
Derviative contracts, net of cash collateral, Assets, Fair value 125 10
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 175 54
Derivative Liabilities, Netting Adjustments 0 0
Derivative Liabilities, Net Fair Value Before Cash Collateral 175 54
Derivative Liabilities, Cash Collateral 0 0
Derivative Liabilities, Fair Value, Net of Cash Collateral 175 54
Not Designated as Hedging Instrument [Member] | Trading [Member]    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 22,535,789 [1] 16,264,818 [2]
Derivative Liabilities, Notional 23,129,139 [1] 20,644,156 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 80,994 118,545
Derivative Assets, Netting Adjustments (51,194) (37,111)
Derivative Assets, Net Fair Value Before Cash Collateral 29,800 81,434
Derivative Assets, Cash Collateral (3,105) (6,996)
Derviative contracts, net of cash collateral, Assets, Fair value 26,695 74,438
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 75,225 224,648
Derivative Liabilities, Netting Adjustments (51,194) (37,111)
Derivative Liabilities, Net Fair Value Before Cash Collateral 24,031 187,537
Derivative Liabilities, Cash Collateral (15,531) (181,917)
Derivative Liabilities, Fair Value, Net of Cash Collateral 8,500 5,620
Not Designated as Hedging Instrument [Member] | Internal risk management programs [Member]    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 515,864 [1] 425,014 [2]
Derivative Liabilities, Notional 79,254 [1] 2,244 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 1,909 7,697
Derivative Assets, Netting Adjustments (476) 0
Derivative Assets, Net Fair Value Before Cash Collateral 1,433 7,697
Derivative Assets, Cash Collateral 0 0
Derviative contracts, net of cash collateral, Assets, Fair value 1,433 7,697
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 1,818 1,264
Derivative Liabilities, Netting Adjustments (476) 0
Derivative Liabilities, Net Fair Value Before Cash Collateral 1,342 1,264
Derivative Liabilities, Cash Collateral 0 0
Derivative Liabilities, Fair Value, Net of Cash Collateral $ 1,342 $ 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.