Derivatives, Fair Value of Derivatives Contracts (Details) - USD ($) $ in Thousands	Dec. 31, 2024		Dec. 31, 2023
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Fair Value, Net of Cash Collateral	$ 242,809		$ 410,304
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Fair Value, Net of Cash Collateral	237,582		587,473
Not Designated as Hedging Instrument [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	29,893,977	[1]	27,348,813	[2]
Derivative Liabilities, Notional	25,018,428	[1]	31,712,601	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	779,821		1,125,034
Derivative Assets, Netting Adjustments	(460,985)		(443,069)
Derivative Assets, Net Fair Value Before Cash Collateral	318,836		681,965
Derivative Assets, Cash Collateral	(76,027)		(271,661)
Derivative Assets, Fair Value, Net of Cash Collateral	242,809		410,304
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	701,259		1,218,900
Derivative Liabilities, Netting Adjustments	(460,985)		(443,069)
Derivative Liabilities, Net Fair Value Before Cash Collateral	240,274		775,831
Derivative Liabilities, Cash Collateral	(2,692)		(188,358)
Derivative Liabilities, Fair Value, Net of Cash Collateral	237,582		587,473
Not Designated as Hedging Instrument [Member] | Total customer risk management programs [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	10,316,447	[1]	10,658,981	[2]
Derivative Liabilities, Notional	10,219,846	[1]	11,066,201	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	646,223		998,792
Derivative Assets, Netting Adjustments	(404,221)		(405,958)
Derivative Assets, Net Fair Value Before Cash Collateral	242,002		592,834
Derivative Assets, Cash Collateral	(75,785)		(264,665)
Derivative Assets, Fair Value, Net of Cash Collateral	166,217		328,169
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	609,715		992,988
Derivative Liabilities, Netting Adjustments	(404,221)		(405,958)
Derivative Liabilities, Net Fair Value Before Cash Collateral	205,494		587,030
Derivative Liabilities, Cash Collateral	(1,400)		(6,441)
Derivative Liabilities, Fair Value, Net of Cash Collateral	204,094		580,589
Not Designated as Hedging Instrument [Member] | Interest rate contracts [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	3,064,418	[1]	2,754,476	[2]
Derivative Liabilities, Notional	3,064,418	[1]	2,754,476	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	82,191		108,450
Derivative Assets, Netting Adjustments	(5,369)		(6,810)
Derivative Assets, Net Fair Value Before Cash Collateral	76,822		101,640
Derivative Assets, Cash Collateral	(71,485)		(94,608)
Derivative Assets, Fair Value, Net of Cash Collateral	5,337		7,032
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	82,141		108,402
Derivative Liabilities, Netting Adjustments	(5,369)		(6,810)
Derivative Liabilities, Net Fair Value Before Cash Collateral	76,772		101,592
Derivative Liabilities, Cash Collateral	0		0
Derivative Liabilities, Fair Value, Net of Cash Collateral	76,772		101,592
Not Designated as Hedging Instrument [Member] | Energy contracts [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	7,169,926	[1]	7,846,190	[2]
Derivative Liabilities, Notional	7,076,929	[1]	8,254,004	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	521,032		836,425
Derivative Assets, Netting Adjustments	(398,457)		(399,148)
Derivative Assets, Net Fair Value Before Cash Collateral	122,575		437,277
Derivative Assets, Cash Collateral	(3,816)		(169,141)
Derivative Assets, Fair Value, Net of Cash Collateral	118,759		268,136
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	488,113		831,467
Derivative Liabilities, Netting Adjustments	(398,457)		(399,148)
Derivative Liabilities, Net Fair Value Before Cash Collateral	89,656		432,319
Derivative Liabilities, Cash Collateral	(1,020)		(6,441)
Derivative Liabilities, Fair Value, Net of Cash Collateral	88,636		425,878
Not Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	80,510	[1]	54,999	[2]
Derivative Liabilities, Notional	76,906	[1]	54,405	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	42,792		53,863
Derivative Assets, Netting Adjustments	(395)		0
Derivative Assets, Net Fair Value Before Cash Collateral	42,397		53,863
Derivative Assets, Cash Collateral	(434)		(872)
Derivative Assets, Fair Value, Net of Cash Collateral	41,963		52,991
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	39,253		53,065
Derivative Liabilities, Netting Adjustments	(395)		0
Derivative Liabilities, Net Fair Value Before Cash Collateral	38,858		53,065
Derivative Liabilities, Cash Collateral	(380)		0
Derivative Liabilities, Fair Value, Net of Cash Collateral	38,478		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	208		54
Derivative Assets, Netting Adjustments	0		0
Derivative Assets, Net Fair Value Before Cash Collateral	208		54
Derivative Assets, Cash Collateral	(50)		(44)
Derivative Assets, Fair Value, Net of Cash Collateral	158		10
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	208		54
Derivative Liabilities, Netting Adjustments	0		0
Derivative Liabilities, Net Fair Value Before Cash Collateral	208		54
Derivative Liabilities, Cash Collateral	0		0
Derivative Liabilities, Fair Value, Net of Cash Collateral	208		54
Not Designated as Hedging Instrument [Member] | Trading [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	19,577,362	[1]	16,264,818	[2]
Derivative Liabilities, Notional	14,196,406	[1]	20,644,156	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	132,581		118,545
Derivative Assets, Netting Adjustments	(56,764)		(37,111)
Derivative Assets, Net Fair Value Before Cash Collateral	75,817		81,434
Derivative Assets, Cash Collateral	(242)		(6,996)
Derivative Assets, Fair Value, Net of Cash Collateral	75,575		74,438
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	87,082		224,648
Derivative Liabilities, Netting Adjustments	(56,764)		(37,111)
Derivative Liabilities, Net Fair Value Before Cash Collateral	30,318		187,537
Derivative Liabilities, Cash Collateral	(1,292)		(181,917)
Derivative Liabilities, Fair Value, Net of Cash Collateral	29,026		5,620
Not Designated as Hedging Instrument [Member] | Internal risk management programs [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	168	[1]	425,014	[2]
Derivative Liabilities, Notional	602,176	[1]	2,244	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	1,017		7,697
Derivative Assets, Netting Adjustments	0		0
Derivative Assets, Net Fair Value Before Cash Collateral	1,017		7,697
Derivative Assets, Cash Collateral	0		0
Derivative Assets, Fair Value, Net of Cash Collateral	1,017		7,697
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	4,462		1,264
Derivative Liabilities, Netting Adjustments	0		0
Derivative Liabilities, Net Fair Value Before Cash Collateral	4,462		1,264
Derivative Liabilities, Cash Collateral	0		0
Derivative Liabilities, Fair Value, Net of Cash Collateral	$ 4,462		$ 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.