Derivatives, Fair Value of Derivatives Contracts (Details) - USD ($) $ in Thousands	Dec. 31, 2021		Dec. 31, 2020
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Fair Value, Net of Cash Collateral	$ 1,097,297		$ 810,688
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Fair Value, Net of Cash Collateral	275,625		405,779
Not Designated as Hedging Instrument [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	45,694,922	[1]	93,418,715	[2]
Derivative Liabilities, Notional	50,930,000	[1]	96,326,522	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	1,588,528		1,294,849
Derivative Assets, Netting Adjustments	(490,268)		(456,498)
Derivative Assets, Net Fair Value Before Cash Collateral	1,098,260		838,351
Derivative Assets, Cash Collateral	(963)		(27,663)
Derivative Assets, Fair Value, Net of Cash Collateral	1,097,297		810,688
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	1,627,386		1,231,665
Derivative Liabilities, Netting Adjustments	(490,268)		(456,498)
Derivative Liabilities, Net Fair Value Before Cash Collateral	1,137,118		775,167
Derivative Liabilities, Cash Collateral	(861,493)		(369,388)
Derivative Liabilities, Fair Value, Net of Cash Collateral	275,625		405,779
Not Designated as Hedging Instrument [Member] | Total customer risk management programs [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	9,232,665	[1]	7,425,999	[2]
Derivative Liabilities, Notional	9,345,519	[1]	7,251,350	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	1,438,147		836,870
Derivative Assets, Netting Adjustments	(385,725)		(211,612)
Derivative Assets, Net Fair Value Before Cash Collateral	1,052,422		625,258
Derivative Assets, Cash Collateral	(242)		(705)
Derivative Assets, Fair Value, Net of Cash Collateral	1,052,180		624,553
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	1,472,882		811,335
Derivative Liabilities, Netting Adjustments	(385,725)		(211,612)
Derivative Liabilities, Net Fair Value Before Cash Collateral	1,087,157		599,723
Derivative Liabilities, Cash Collateral	(837,419)		(223,281)
Derivative Liabilities, Fair Value, Net of Cash Collateral	249,738		376,442
Not Designated as Hedging Instrument [Member] | Interest rate swaps [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	2,614,162	[1]	3,212,469	[2]
Derivative Liabilities, Notional	2,614,162	[1]	3,212,469	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	53,881		113,524
Derivative Assets, Netting Adjustments	(10,101)		(144)
Derivative Assets, Net Fair Value Before Cash Collateral	43,780		113,380
Derivative Assets, Cash Collateral	0		0
Derivative Assets, Fair Value, Net of Cash Collateral	43,780		113,380
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	54,062		113,900
Derivative Liabilities, Netting Adjustments	(10,101)		(144)
Derivative Liabilities, Net Fair Value Before Cash Collateral	43,961		113,756
Derivative Liabilities, Cash Collateral	(33,870)		(104,202)
Derivative Liabilities, Fair Value, Net of Cash Collateral	10,091		9,554
Not Designated as Hedging Instrument [Member] | Energy contracts [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	6,360,095	[1]	3,791,565	[2]
Derivative Liabilities, Notional	6,480,840	[1]	3,617,678	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	1,168,363		386,008
Derivative Assets, Netting Adjustments	(375,624)		(211,468)
Derivative Assets, Net Fair Value Before Cash Collateral	792,739		174,540
Derivative Assets, Cash Collateral	0		0
Derivative Assets, Fair Value, Net of Cash Collateral	792,739		174,540
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	1,210,946		361,334
Derivative Liabilities, Netting Adjustments	(375,624)		(211,468)
Derivative Liabilities, Net Fair Value Before Cash Collateral	835,322		149,866
Derivative Liabilities, Cash Collateral	(803,102)		(114,070)
Derivative Liabilities, Fair Value, Net of Cash Collateral	32,220		35,796
Not Designated as Hedging Instrument [Member] | Agricultural contracts [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	0	[1]	14,765	[2]
Derivative Liabilities, Notional	0	[1]	14,781	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	0		3,859
Derivative Assets, Netting Adjustments	0		0
Derivative Assets, Net Fair Value Before Cash Collateral	0		3,859
Derivative Assets, Cash Collateral	0		0
Derivative Assets, Fair Value, Net of Cash Collateral	0		3,859
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	0		3,844
Derivative Liabilities, Netting Adjustments	0		0
Derivative Liabilities, Net Fair Value Before Cash Collateral	0		3,844
Derivative Liabilities, Cash Collateral	0		(3,844)
Derivative Liabilities, Fair Value, Net of Cash Collateral	0		0
Not Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	216,272	[1]	337,001	[2]
Derivative Liabilities, Notional	208,381	[1]	336,223	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	215,148		332,257
Derivative Assets, Netting Adjustments	0		0
Derivative Assets, Net Fair Value Before Cash Collateral	215,148		332,257
Derivative Assets, Cash Collateral	0		(420)
Derivative Assets, Fair Value, Net of Cash Collateral	215,148		331,837
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	207,119		331,035
Derivative Liabilities, Netting Adjustments	0		0
Derivative Liabilities, Net Fair Value Before Cash Collateral	207,119		331,035
Derivative Liabilities, Cash Collateral	(447)		(1,165)
Derivative Liabilities, Fair Value, Net of Cash Collateral	206,672		329,870
Not Designated as Hedging Instrument [Member] | Equity option contracts [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	42,136	[1]	70,199	[2]
Derivative Liabilities, Notional	42,136	[1]	70,199	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	755		1,222
Derivative Assets, Netting Adjustments	0		0
Derivative Assets, Net Fair Value Before Cash Collateral	755		1,222
Derivative Assets, Cash Collateral	(242)		(285)
Derivative Assets, Fair Value, Net of Cash Collateral	513		937
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	755		1,222
Derivative Liabilities, Netting Adjustments	0		0
Derivative Liabilities, Net Fair Value Before Cash Collateral	755		1,222
Derivative Liabilities, Cash Collateral	0		0
Derivative Liabilities, Fair Value, Net of Cash Collateral	755		1,222
Not Designated as Hedging Instrument [Member] | Trading [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	35,592,751	[1]	84,997,593	[2]
Derivative Liabilities, Notional	41,285,649	[1]	88,929,916	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	139,694		440,627
Derivative Assets, Netting Adjustments	(104,326)		(240,655)
Derivative Assets, Net Fair Value Before Cash Collateral	35,368		199,972
Derivative Assets, Cash Collateral	(721)		(26,958)
Derivative Assets, Fair Value, Net of Cash Collateral	34,647		173,014
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	152,947		414,801
Derivative Liabilities, Netting Adjustments	(104,326)		(240,655)
Derivative Liabilities, Net Fair Value Before Cash Collateral	48,621		174,146
Derivative Liabilities, Cash Collateral	(24,074)		(145,692)
Derivative Liabilities, Fair Value, Net of Cash Collateral	24,547		28,454
Not Designated as Hedging Instrument [Member] | Internal risk management programs [Member]
Notional Amount of Derivatives [Abstract]
Derivative Assets, Notional	869,506	[1]	995,123	[2]
Derivative Liabilities, Notional	298,832	[1]	145,256	[2]
Derivative Assets, Fair Value, Net [Abstract]
Derivative Assets, Gross Fair Value	10,687		17,352
Derivative Assets, Netting Adjustments	(217)		(4,231)
Derivative Assets, Net Fair Value Before Cash Collateral	10,470		13,121
Derivative Assets, Cash Collateral	0		0
Derivative Assets, Fair Value, Net of Cash Collateral	10,470		13,121
Derivative Liabilities, Fair Value, Net [Abstract]
Derivative Liabilities, Gross Fair Value	1,557		5,529
Derivative Liabilities, Netting Adjustments	(217)		(4,231)
Derivative Liabilities, Net Fair Value Before Cash Collateral	1,340		1,298
Derivative Liabilities, Cash Collateral	0		(415)
Derivative Liabilities, Fair Value, Net of Cash Collateral	$ 1,340		$ 883

[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.