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Derivative Financial Instruments (Schedule Of Derivative Instruments, Gain (Loss) in Statement of Financial Performance) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income $ (18,632) $ 3,423 $ 48,797
Carrying Amount of the Hedged Assets, Inventories 72,320 53,963  
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets 6,291 9,041  
Not Designated as Hedging Instrument [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain or (Loss) Recognized in Income on Derivatives (187,645) 22,101 (15,114)
Revenue [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income (60,261) 5,538  
Gains (Losses) Due to Ineffectiveness of Cash Flow Hedges (60,261) 5,538  
Cost of Goods Sold [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income 41,629 (2,115)  
Gains (Losses) Due to Ineffectiveness of Cash Flow Hedges 47,501 (769) 3,410
Net Income (Loss) From Discontinued Operations, Net Of Income Taxes [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income     48,797
Gains (Losses) Due to Ineffectiveness of Cash Flow Hedges     48,797
Commodity Contracts [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Gain (Loss) Recognized in Other Comprehensive Income on Derivatives (32,036) (1,025) 70,404
Commodity Contracts [Member] | Revenue [Member] | Not Designated as Hedging Instrument [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain or (Loss) Recognized in Income on Derivatives (194,143) (10,813) (10,202)
Commodity Contracts [Member] | Cost of Goods Sold [Member] | Not Designated as Hedging Instrument [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain or (Loss) Recognized in Income on Derivatives 6,498 32,914 (2,442)
Commodity Contracts [Member] | Net Income (Loss) From Discontinued Operations, Net Of Income Taxes [Member] | Not Designated as Hedging Instrument [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain or (Loss) Recognized in Income on Derivatives     (2,470)
Commodity Contracts [Member] | Fair Value Hedging [Member] | Cost of Goods Sold [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Gains (Losses) Due to Ineffectiveness of Cash Flow Hedges 20,567 5,098 (844)
Commodity Contracts [Member] | Fair Value Hedging [Member] | Cost of Goods Sold [Member] | Designated as Hedging Instrument [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Gains (Losses) Due to Ineffectiveness of Cash Flow Hedges $ (14,695) $ (3,752) $ 4,254