Derivatives (Volume of Contracts Outstanding) (Details) gal in Thousands, bu in Thousands, T in Thousands	Jun. 30, 2024 bu	Jun. 30, 2024 gal	Jun. 30, 2024 T	Dec. 31, 2023 bu	Dec. 31, 2023 gal	Dec. 31, 2023 T	Jun. 30, 2023 bu	Jun. 30, 2023 gal	Jun. 30, 2023 T
Amounts of quantities outstanding included in commodity derivative contracts
Nonmonetary notional amount	974,501	487,613	4,135	911,026	416,381	3,993	1,130,484	381,468	3,866
Non-exchange Traded
Amounts of quantities outstanding included in commodity derivative contracts
Nonmonetary notional amount	630,888	295,253	3,443	650,828	244,139	3,168	865,282	242,070	3,473
Non-exchange Traded | Corn
Amounts of quantities outstanding included in commodity derivative contracts
Nonmonetary notional amount	459,565	0	0	519,825	0	0	547,805	0	0
Non-exchange Traded | Soybeans
Amounts of quantities outstanding included in commodity derivative contracts
Nonmonetary notional amount	33,415	0	0	41,848	0	0	42,273	0	0
Non-exchange Traded | Wheat
Amounts of quantities outstanding included in commodity derivative contracts
Nonmonetary notional amount	101,022	0	0	66,953	0	0	236,316	0	0
Non-exchange Traded | Oats
Amounts of quantities outstanding included in commodity derivative contracts
Nonmonetary notional amount	31,958	0	0	15,355	0	0	27,824	0	0
Non-exchange Traded | Ethanol
Amounts of quantities outstanding included in commodity derivative contracts
Nonmonetary notional amount	0	241,555	0	0	206,986	0	0	208,251	0
Non-exchange Traded | Dried distillers grain
Amounts of quantities outstanding included in commodity derivative contracts
Nonmonetary notional amount	0	0	872	0	0	740	0	0	479
Non-exchange Traded | Soybean meal
Amounts of quantities outstanding included in commodity derivative contracts
Nonmonetary notional amount	0	0	420	0	0	546	0	0	290
Non-exchange Traded | Other
Amounts of quantities outstanding included in commodity derivative contracts
Nonmonetary notional amount	4,928	53,698	2,151	6,847	37,153	1,882	11,064	33,819	2,704
Exchange Traded
Amounts of quantities outstanding included in commodity derivative contracts
Nonmonetary notional amount	343,613	192,360	692	260,198	172,242	825	265,202	139,398	393
Exchange Traded | Corn
Amounts of quantities outstanding included in commodity derivative contracts
Nonmonetary notional amount	190,010	0	0	160,795	0	0	177,425	0	0
Exchange Traded | Soybeans
Amounts of quantities outstanding included in commodity derivative contracts
Nonmonetary notional amount	42,830	0	0	34,250	0	0	27,555	0	0
Exchange Traded | Wheat
Amounts of quantities outstanding included in commodity derivative contracts
Nonmonetary notional amount	110,618	0	0	64,778	0	0	59,262	0	0
Exchange Traded | Oats
Amounts of quantities outstanding included in commodity derivative contracts
Nonmonetary notional amount	155	0	0	375	0	0	960	0	0
Exchange Traded | Ethanol
Amounts of quantities outstanding included in commodity derivative contracts
Nonmonetary notional amount	0	75,306	0	0	97,272	0	0	74,760	0
Exchange Traded | Propane
Amounts of quantities outstanding included in commodity derivative contracts
Nonmonetary notional amount	0	113,274	0	0	74,550	0	0	63,630	0
Exchange Traded | Other
Amounts of quantities outstanding included in commodity derivative contracts
Nonmonetary notional amount	0	3,780	692	0	420	825	0	1,008	393