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Segment Disclosures (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Segment data        
Net sales $ 1,362 $ 847 $ 3,998 $ 3,022
Cost of sales 922 764 2,766 2,401
Gross margin 440 83 1,232 621
Total other operating costs and expenses 552 45 669 162
Equity in earnings of operating affiliate 15 2 37 8
Operating (loss) earnings (97) 40 600 467
Impairment charges 495   495  
Goodwill impairment 259 0 259 0
Winter Storm Uri        
Segment data        
Net sales     68  
Gain on sale of derivatives 0 0 112 0
Ammonia        
Segment data        
Net sales 344 165 1,009 722
Goodwill impairment     4  
Granular Urea        
Segment data        
Net sales 386 249 1,218 915
Goodwill impairment     0  
UAN        
Segment data        
Net sales 390 248 1,056 791
Goodwill impairment     0  
AN        
Segment data        
Net sales 118 109 359 343
Goodwill impairment     233  
Other        
Segment data        
Goodwill impairment     22  
Operating Segments | Ammonia        
Segment data        
Net sales 344 165 1,009 722
Cost of sales 262 174 675 609
Gross margin 82 (9) 334 113
Operating Segments | Granular Urea        
Segment data        
Net sales 386 249 1,218 915
Cost of sales 200 183 705 612
Gross margin 186 66 513 303
Operating Segments | UAN        
Segment data        
Net sales 390 248 1,056 791
Cost of sales 233 237 759 675
Gross margin 157 11 297 116
Operating Segments | AN        
Segment data        
Net sales 118 109 359 343
Cost of sales 122 96 337 290
Gross margin (4) 13 22 53
Operating Segments | Other        
Segment data        
Net sales 124 76 356 251
Cost of sales 105 74 290 215
Gross margin $ 19 $ 2 $ 66 $ 36