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Derivatives, Fair Value of Derivatives Contracts (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Derivative Assets, Fair Value, Net [Abstract]    
Derviative contracts, net of cash collateral, Assets, Fair value $ 1,701,443 $ 810,688
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Fair Value, Net of Cash Collateral 612,261 405,779
Not Designated as Hedging Instrument [Member]    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 67,408,135 [1] 93,418,715 [2]
Derivative Liabilities, Notional 63,636,234 [1] 96,326,522 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 2,062,183 1,294,849
Derivative Assets, Netting Adjustments (355,124) (456,498)
Derivative Assets, Net Fair Value Before Cash Collateral 1,707,059 838,351
Derivative Assets, Cash Collateral (5,616) (27,663)
Derviative contracts, net of cash collateral, Assets, Fair value 1,701,443 810,688
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 2,034,504 1,231,665
Derivative Liabilities, Netting Adjustments (355,124) (456,498)
Derivative Liabilities, Net Fair Value Before Cash Collateral 1,679,380 775,167
Derivative Liabilities, Cash Collateral (1,067,119) (369,388)
Derivative Liabilities, Fair Value, Net of Cash Collateral 612,261 405,779
Not Designated as Hedging Instrument [Member] | Total customer risk management programs    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 8,671,892 [1] 7,425,999 [2]
Derivative Liabilities, Notional 8,673,186 [1] 7,251,350 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 1,855,956 836,870
Derivative Assets, Netting Adjustments (221,898) (211,612)
Derivative Assets, Net Fair Value Before Cash Collateral 1,634,058 625,258
Derivative Assets, Cash Collateral (1,200) (705)
Derviative contracts, net of cash collateral, Assets, Fair value 1,632,858 624,553
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 1,854,044 811,335
Derivative Liabilities, Netting Adjustments (221,898) (211,612)
Derivative Liabilities, Net Fair Value Before Cash Collateral 1,632,146 599,723
Derivative Liabilities, Cash Collateral (1,041,729) (223,281)
Derivative Liabilities, Fair Value, Net of Cash Collateral 590,417 376,442
Not Designated as Hedging Instrument [Member] | Interest rate contracts [Member]    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 2,983,763 [1] 3,212,469 [2]
Derivative Liabilities, Notional 2,983,763 [1] 3,212,469 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 78,138 113,524
Derivative Assets, Netting Adjustments (6,342) (144)
Derivative Assets, Net Fair Value Before Cash Collateral 71,796 113,380
Derivative Assets, Cash Collateral 0 0
Derviative contracts, net of cash collateral, Assets, Fair value 71,796 113,380
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 78,401 113,900
Derivative Liabilities, Netting Adjustments (6,342) (144)
Derivative Liabilities, Net Fair Value Before Cash Collateral 72,059 113,756
Derivative Liabilities, Cash Collateral (65,484) (104,202)
Derivative Liabilities, Fair Value, Net of Cash Collateral 6,575 9,554
Not Designated as Hedging Instrument [Member] | Energy contracts [Member]    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 5,049,908 [1] 3,791,565 [2]
Derivative Liabilities, Notional 5,051,395 [1] 3,617,678 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 1,206,874 386,008
Derivative Assets, Netting Adjustments (215,206) (211,468)
Derivative Assets, Net Fair Value Before Cash Collateral 991,668 174,540
Derivative Assets, Cash Collateral 0 0
Derviative contracts, net of cash collateral, Assets, Fair value 991,668 174,540
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 1,205,095 361,334
Derivative Liabilities, Netting Adjustments (215,206) (211,468)
Derivative Liabilities, Net Fair Value Before Cash Collateral 989,889 149,866
Derivative Liabilities, Cash Collateral (975,704) (114,070)
Derivative Liabilities, Fair Value, Net of Cash Collateral 14,185 35,796
Not Designated as Hedging Instrument [Member] | Agricultural contracts [Member]    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 7,983 [1] 14,765 [2]
Derivative Liabilities, Notional 7,977 [1] 14,781 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 382 3,859
Derivative Assets, Netting Adjustments (350) 0
Derivative Assets, Net Fair Value Before Cash Collateral 32 3,859
Derivative Assets, Cash Collateral 0 0
Derviative contracts, net of cash collateral, Assets, Fair value 32 3,859
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 372 3,844
Derivative Liabilities, Netting Adjustments (350) 0
Derivative Liabilities, Net Fair Value Before Cash Collateral 22 3,844
Derivative Liabilities, Cash Collateral (22) (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 571,224 [1] 337,001 [2]
Derivative Liabilities, Notional 571,037 [1] 336,223 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 569,144 332,257
Derivative Assets, Netting Adjustments 0 0
Derivative Assets, Net Fair Value Before Cash Collateral 569,144 332,257
Derivative Assets, Cash Collateral (900) (420)
Derviative contracts, net of cash collateral, Assets, Fair value 568,244 331,837
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 568,758 331,035
Derivative Liabilities, Netting Adjustments 0 0
Derivative Liabilities, Net Fair Value Before Cash Collateral 568,758 331,035
Derivative Liabilities, Cash Collateral (519) (1,165)
Derivative Liabilities, Fair Value, Net of Cash Collateral 568,239 329,870
Not Designated as Hedging Instrument [Member] | Equity option contracts [Member]    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 59,014 [1] 70,199 [2]
Derivative Liabilities, Notional 59,014 [1] 70,199 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 1,418 1,222
Derivative Assets, Netting Adjustments 0 0
Derivative Assets, Net Fair Value Before Cash Collateral 1,418 1,222
Derivative Assets, Cash Collateral (300) (285)
Derviative contracts, net of cash collateral, Assets, Fair value 1,118 937
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 1,418 1,222
Derivative Liabilities, Netting Adjustments 0 0
Derivative Liabilities, Net Fair Value Before Cash Collateral 1,418 1,222
Derivative Liabilities, Cash Collateral 0 0
Derivative Liabilities, Fair Value, Net of Cash Collateral 1,418 1,222
Not Designated as Hedging Instrument [Member] | Trading [Member]    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 57,953,169 [1] 84,997,593 [2]
Derivative Liabilities, Notional 54,179,938 [1] 88,929,916 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 189,111 440,627
Derivative Assets, Netting Adjustments (125,437) (240,655)
Derivative Assets, Net Fair Value Before Cash Collateral 63,674 199,972
Derivative Assets, Cash Collateral (4,416) (26,958)
Derviative contracts, net of cash collateral, Assets, Fair value 59,258 173,014
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 171,344 414,801
Derivative Liabilities, Netting Adjustments (125,437) (240,655)
Derivative Liabilities, Net Fair Value Before Cash Collateral 45,907 174,146
Derivative Liabilities, Cash Collateral (25,390) (145,692)
Derivative Liabilities, Fair Value, Net of Cash Collateral 20,517 28,454
Not Designated as Hedging Instrument [Member] | Internal risk management programs [Member]    
Notional Amount of Derivatives [Abstract]    
Derivative Assets, Notional 783,074 [1] 995,123 [2]
Derivative Liabilities, Notional 783,110 [1] 145,256 [2]
Derivative Assets, Fair Value, Net [Abstract]    
Derivative Assets, Gross Fair Value 17,116 17,352
Derivative Assets, Netting Adjustments (7,789) (4,231)
Derivative Assets, Net Fair Value Before Cash Collateral 9,327 13,121
Derivative Assets, Cash Collateral 0 0
Derviative contracts, net of cash collateral, Assets, Fair value 9,327 13,121
Derivative Liabilities, Fair Value, Net [Abstract]    
Derivative Liabilities, Gross Fair Value 9,116 5,529
Derivative Liabilities, Netting Adjustments (7,789) (4,231)
Derivative Liabilities, Net Fair Value Before Cash Collateral 1,327 1,298
Derivative Liabilities, Cash Collateral 0 (415)
Derivative Liabilities, Fair Value, Net of Cash Collateral $ 1,327 $ 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.