Derivatives, Fair Value of Derivatives Contracts (Details) - USD ($) $ in Thousands	Dec. 31, 2023		Dec. 31, 2022
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Fair Value, Net of Cash Collateral	$ 410,304		$ 880,343
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Fair Value, Net of Cash Collateral	587,473		554,900
Not Designated as Hedging Instrument [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	27,348,813	[1]	28,273,268	[2]
Derivative Liabilities, Notional	31,712,601	[1]	25,778,851	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	1,125,034		1,736,280
Derivative Assets, Netting Adjustments	(443,069)		(669,203)
Derivative Assets, Net Fair Value Before Cash Collateral	681,965		1,067,077
Derivative Assets, Cash Collateral	(271,661)		(186,734)
Derivative Assets, Fair Value, Net of Cash Collateral	410,304		880,343
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	1,218,900		1,708,852
Derivative Liabilities, Netting Adjustments	(443,069)		(669,203)
Derivative Liabilities, Net Fair Value Before Cash Collateral	775,831		1,039,649
Derivative Liabilities, Cash Collateral	(188,358)		(484,749)
Derivative Liabilities, Fair Value, Net of Cash Collateral	587,473		554,900
Not Designated as Hedging Instrument [Member] | Total customer risk management programs [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	10,658,981	[1]	10,788,231	[2]
Derivative Liabilities, Notional	11,066,201	[1]	11,561,139	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	998,792		1,607,870
Derivative Assets, Netting Adjustments	(405,958)		(594,543)
Derivative Assets, Net Fair Value Before Cash Collateral	592,834		1,013,327
Derivative Assets, Cash Collateral	(264,665)		(182,088)
Derivative Assets, Fair Value, Net of Cash Collateral	328,169		831,239
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	992,988		1,612,300
Derivative Liabilities, Netting Adjustments	(405,958)		(594,543)
Derivative Liabilities, Net Fair Value Before Cash Collateral	587,030		1,017,757
Derivative Liabilities, Cash Collateral	(6,441)		(484,326)
Derivative Liabilities, Fair Value, Net of Cash Collateral	580,589		533,431
Not Designated as Hedging Instrument [Member] | Interest rate contracts [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	2,754,476	[1]	2,629,318	[2]
Derivative Liabilities, Notional	2,754,476	[1]	2,629,122	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	108,450		158,825
Derivative Assets, Netting Adjustments	(6,810)		0
Derivative Assets, Net Fair Value Before Cash Collateral	101,640		158,825
Derivative Assets, Cash Collateral	(94,608)		(114,955)
Derivative Assets, Fair Value, Net of Cash Collateral	7,032		43,870
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	108,402		158,816
Derivative Liabilities, Netting Adjustments	(6,810)		0
Derivative Liabilities, Net Fair Value Before Cash Collateral	101,592		158,816
Derivative Liabilities, Cash Collateral	0		0
Derivative Liabilities, Fair Value, Net of Cash Collateral	101,592		158,816
Not Designated as Hedging Instrument [Member] | Energy contracts [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	7,846,190	[1]	7,918,020	[2]
Derivative Liabilities, Notional	8,254,004	[1]	8,696,060	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	836,425		1,232,283
Derivative Assets, Netting Adjustments	(399,148)		(594,543)
Derivative Assets, Net Fair Value Before Cash Collateral	437,277		637,740
Derivative Assets, Cash Collateral	(169,141)		(67,024)
Derivative Assets, Fair Value, Net of Cash Collateral	268,136		570,716
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	831,467		1,242,058
Derivative Liabilities, Netting Adjustments	(399,148)		(594,543)
Derivative Liabilities, Net Fair Value Before Cash Collateral	432,319		647,515
Derivative Liabilities, Cash Collateral	(6,441)		(484,319)
Derivative Liabilities, Fair Value, Net of Cash Collateral	425,878		163,196
Not Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	54,999	[1]	219,791	[2]
Derivative Liabilities, Notional	54,405	[1]	214,855	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	53,863		216,569
Derivative Assets, Netting Adjustments	0		0
Derivative Assets, Net Fair Value Before Cash Collateral	53,863		216,569
Derivative Assets, Cash Collateral	(872)		0
Derivative Assets, Fair Value, Net of Cash Collateral	52,991		216,569
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	53,065		211,233
Derivative Liabilities, Netting Adjustments	0		0
Derivative Liabilities, Net Fair Value Before Cash Collateral	53,065		211,233
Derivative Liabilities, Cash Collateral	0		(7)
Derivative Liabilities, Fair Value, Net of Cash Collateral	53,065		211,226
Not Designated as Hedging Instrument [Member] | Equity option contracts [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	3,316	[1]	21,102	[2]
Derivative Liabilities, Notional	3,316	[1]	21,102	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	54		193
Derivative Assets, Netting Adjustments	0		0
Derivative Assets, Net Fair Value Before Cash Collateral	54		193
Derivative Assets, Cash Collateral	(44)		(109)
Derivative Assets, Fair Value, Net of Cash Collateral	10		84
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	54		193
Derivative Liabilities, Netting Adjustments	0		0
Derivative Liabilities, Net Fair Value Before Cash Collateral	54		193
Derivative Liabilities, Cash Collateral	0		0
Derivative Liabilities, Fair Value, Net of Cash Collateral	54		193
Not Designated as Hedging Instrument [Member] | Trading [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	16,264,818	[1]	17,400,037	[2]
Derivative Liabilities, Notional	20,644,156	[1]	14,038,906	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	118,545		126,910
Derivative Assets, Netting Adjustments	(37,111)		(74,647)
Derivative Assets, Net Fair Value Before Cash Collateral	81,434		52,263
Derivative Assets, Cash Collateral	(6,996)		(4,646)
Derivative Assets, Fair Value, Net of Cash Collateral	74,438		47,617
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	224,648		94,958
Derivative Liabilities, Netting Adjustments	(37,111)		(74,647)
Derivative Liabilities, Net Fair Value Before Cash Collateral	187,537		20,311
Derivative Liabilities, Cash Collateral	(181,917)		(423)
Derivative Liabilities, Fair Value, Net of Cash Collateral	5,620		19,888
Not Designated as Hedging Instrument [Member] | Internal risk management programs [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	425,014	[1]	85,000	[2]
Derivative Liabilities, Notional	2,244	[1]	178,806	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	7,697		1,500
Derivative Assets, Netting Adjustments	0		(13)
Derivative Assets, Net Fair Value Before Cash Collateral	7,697		1,487
Derivative Assets, Cash Collateral	0		0
Derivative Assets, Fair Value, Net of Cash Collateral	7,697		1,487
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	1,264		1,594
Derivative Liabilities, Netting Adjustments	0		(13)
Derivative Liabilities, Net Fair Value Before Cash Collateral	1,264		1,581
Derivative Liabilities, Cash Collateral	0		0
Derivative Liabilities, Fair Value, Net of Cash Collateral	$ 1,264		$ 1,581

[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.