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Derivative Financial Instruments and Hedging Activities - Derivatives (Details)
$ in Thousands, bbl in Millions
 3 Months Ended 9 Months Ended
Nov. 30, 2021
bbl
May 31, 2022
USD ($)
bbl
May 31, 2021
USD ($)
Aug. 31, 2021
USD ($)
Derivative [Line Items]        
Derivative Liability, Noncurrent   $ 3,600   $ 4,800
Derivative Asset, Fair Value, Amount Not Offset Against Collateral   854,091   558,993
Derivative Asset, Fair Value, Gross Amount Not Offset on Balance Sheet   36,425   9,756
Derivative Liability, Fair Value, Amount Not Offset Against Collateral   586,878   441,126
Derivative Liability, Collateral, Right to Reclaim Cash, Offset   239   2,485
Derivative Liability, Fair Value, Gross Amount Not Offset on Balance Sheet   38,000   9,756
Embedded Derivative, Gain on Embedded Derivative   2,100 $ 2,200  
Derivative Asset, Noncurrent, Excluding Fair Value Hedges   29,300   21,600
CF Nitrogen LLC [Member]        
Derivative [Line Items]        
Annual Payment Receivable Contingent On Investment Credit Rating   5,000    
Embedded derivative asset   13,500    
Foreign exchange derivatives | Not Designated as Hedging Instrument        
Derivative [Line Items]        
Derivative Asset, Fair Value, Amount Not Offset Against Collateral   99,394   13,847
Derivative Asset, Fair Value, Gross Amount Not Offset on Balance Sheet   15,410   5,582
Derivative Liability, Fair Value, Amount Not Offset Against Collateral   44   2,924
Derivative Liability, Collateral, Right to Reclaim Cash, Offset   0   0
Derivative Liability, Fair Value, Gross Amount Not Offset on Balance Sheet   15,410   5,582
Derivative, Notional Amount   1,900,000   1,200,000
Embedded Derivative Financial Instruments [Member] | Not Designated as Hedging Instrument        
Derivative [Line Items]        
Derivative Asset, Fair Value, Amount Not Offset Against Collateral   13,545   16,488
Derivative Asset, Fair Value, Gross Amount Not Offset on Balance Sheet   0   0
Commodity derivatives | Not Designated as Hedging Instrument        
Derivative [Line Items]        
Derivative Asset, Fair Value, Amount Not Offset Against Collateral   741,152   528,658
Derivative Asset, Fair Value, Gross Amount Not Offset on Balance Sheet   21,015   4,174
Derivative Liability, Fair Value, Amount Not Offset Against Collateral   586,834   438,202
Derivative Liability, Collateral, Right to Reclaim Cash, Offset   239   2,485
Derivative Liability, Fair Value, Gross Amount Not Offset on Balance Sheet   $ 22,590   $ 4,174
Cash Flow Hedging        
Derivative [Line Items]        
Aggregate notional amount of cash flow hedges (in barrels) | bbl 2.7 6.1