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Financing Agreements - Narrative (Details) - USD ($)
Sep. 30, 2023
Dec. 31, 2022
Financing agreements    
Principal $ 3,000,000,000 $ 3,000,000,000
Letter of Credit | Letter of Credit    
Financing agreements    
Maximum borrowing capacity 350,000,000  
Line of Credit Facility, Fair Value of Amount Outstanding 200,000,000  
CF Industries | Credit Agreement    
Financing agreements    
Available credit 750,000,000  
Outstanding letters of credit 0  
Long-term Line of Credit $ 0 $ 0