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Derivatives, Fair Value of Derivatives Contracts (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Derivative Assets, Fair Value, Net [Abstract]    
Derviative contracts, net of cash collateral, Assets, Fair value $ 546,109 $ 880,343
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Fair Value, Net of Cash Collateral 403,947 554,900
Not Designated as Hedging Instrument [Member]    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 36,026,931 [1] 28,273,268 [2]
Derivative Liabilities, Notional 30,848,818 [1] 25,778,851 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 1,436,083 1,736,280
Derivative Assets, Netting Adjustments (692,894) (669,203)
Derivative Assets, Net Fair Value Before Cash Collateral 743,189 1,067,077
Derivative Assets, Cash Collateral (197,080) (186,734)
Derviative contracts, net of cash collateral, Assets, Fair value 546,109 880,343
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 1,345,113 1,708,852
Derivative Liabilities, Netting Adjustments (692,895) (669,203)
Derivative Liabilities, Net Fair Value Before Cash Collateral 652,218 1,039,649
Derivative Liabilities, Cash Collateral (248,271) (484,749)
Derivative Liabilities, Fair Value, Net of Cash Collateral 403,947 554,900
Not Designated as Hedging Instrument [Member] | Total customer risk management programs    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 11,456,977 [1] 10,788,231 [2]
Derivative Liabilities, Notional 11,775,264 [1] 11,561,139 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 1,201,274 1,607,870
Derivative Assets, Netting Adjustments (607,483) (594,543)
Derivative Assets, Net Fair Value Before Cash Collateral 593,791 1,013,327
Derivative Assets, Cash Collateral (197,080) (182,088)
Derviative contracts, net of cash collateral, Assets, Fair value 396,711 831,239
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 1,189,805 1,612,300
Derivative Liabilities, Netting Adjustments (607,483) (594,543)
Derivative Liabilities, Net Fair Value Before Cash Collateral 582,322 1,017,757
Derivative Liabilities, Cash Collateral (242,133) (484,326)
Derivative Liabilities, Fair Value, Net of Cash Collateral 340,189 533,431
Not Designated as Hedging Instrument [Member] | Interest rate contracts [Member]    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 2,763,185 [1] 2,629,318 [2]
Derivative Liabilities, Notional [1] 2,763,185 2,629,122
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 160,856 158,825
Derivative Assets, Netting Adjustments 0 0
Derivative Assets, Net Fair Value Before Cash Collateral 160,856 158,825
Derivative Assets, Cash Collateral (160,548) (114,955)
Derviative contracts, net of cash collateral, Assets, Fair value 308 43,870
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 160,869 158,816
Derivative Liabilities, Netting Adjustments 0 0
Derivative Liabilities, Net Fair Value Before Cash Collateral 160,869 158,816
Derivative Liabilities, Cash Collateral 0 0
Derivative Liabilities, Fair Value, Net of Cash Collateral 160,869 158,816
Not Designated as Hedging Instrument [Member] | Energy contracts [Member]    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 8,617,592 [1] 7,918,020 [2]
Derivative Liabilities, Notional 8,941,634 [1] 8,696,060 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 972,109 1,232,283
Derivative Assets, Netting Adjustments (607,483) (594,543)
Derivative Assets, Net Fair Value Before Cash Collateral 364,626 637,740
Derivative Assets, Cash Collateral (34,399) (67,024)
Derviative contracts, net of cash collateral, Assets, Fair value 330,227 570,716
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 966,583 1,242,058
Derivative Liabilities, Netting Adjustments (607,483) (594,543)
Derivative Liabilities, Net Fair Value Before Cash Collateral 359,100 647,515
Derivative Liabilities, Cash Collateral (242,133) (484,319)
Derivative Liabilities, Fair Value, Net of Cash Collateral 116,967 163,196
Not Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member]    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 70,676 [1] 219,791 [2]
Derivative Liabilities, Notional 64,921 [1] 214,855 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 68,262 216,569
Derivative Assets, Netting Adjustments 0 0
Derivative Assets, Net Fair Value Before Cash Collateral 68,262 216,569
Derivative Assets, Cash Collateral (2,086) 0
Derviative contracts, net of cash collateral, Assets, Fair value 66,176 216,569
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 62,306 211,233
Derivative Liabilities, Netting Adjustments 0 0
Derivative Liabilities, Net Fair Value Before Cash Collateral 62,306 211,233
Derivative Liabilities, Cash Collateral 0 (7)
Derivative Liabilities, Fair Value, Net of Cash Collateral 62,306 211,226
Not Designated as Hedging Instrument [Member] | Equity option contracts [Member]    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 5,524 [1] 21,102 [2]
Derivative Liabilities, Notional 5,524 [1] 21,102 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 47 193
Derivative Assets, Netting Adjustments 0 0
Derivative Assets, Net Fair Value Before Cash Collateral 47 193
Derivative Assets, Cash Collateral (47) (109)
Derviative contracts, net of cash collateral, Assets, Fair value 0 84
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 47 193
Derivative Liabilities, Netting Adjustments 0 0
Derivative Liabilities, Net Fair Value Before Cash Collateral 47 193
Derivative Liabilities, Cash Collateral 0 0
Derivative Liabilities, Fair Value, Net of Cash Collateral 47 193
Not Designated as Hedging Instrument [Member] | Trading [Member]    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 24,569,954 [1] 17,400,037 [2]
Derivative Liabilities, Notional 18,778,554 [1] 14,038,906 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 234,809 126,910
Derivative Assets, Netting Adjustments (85,411) (74,647)
Derivative Assets, Net Fair Value Before Cash Collateral 149,398 52,263
Derivative Assets, Cash Collateral 0 (4,646)
Derviative contracts, net of cash collateral, Assets, Fair value 149,398 47,617
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 150,983 94,958
Derivative Liabilities, Netting Adjustments (85,412) (74,647)
Derivative Liabilities, Net Fair Value Before Cash Collateral 65,571 20,311
Derivative Liabilities, Cash Collateral (6,138) (423)
Derivative Liabilities, Fair Value, Net of Cash Collateral 59,433 19,888
Not Designated as Hedging Instrument [Member] | Internal risk management programs [Member]    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 0 [1] 85,000 [2]
Derivative Liabilities, Notional 295,000 [1] 178,806 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 0 1,500
Derivative Assets, Netting Adjustments 0 (13)
Derivative Assets, Net Fair Value Before Cash Collateral 0 1,487
Derivative Assets, Cash Collateral 0 0
Derviative contracts, net of cash collateral, Assets, Fair value 0 1,487
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 4,325 1,594
Derivative Liabilities, Netting Adjustments 0 (13)
Derivative Liabilities, Net Fair Value Before Cash Collateral 4,325 1,581
Derivative Liabilities, Cash Collateral 0 0
Derivative Liabilities, Fair Value, Net of Cash Collateral $ 4,325 $ 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.