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Financing Agreements (Details) - USD ($)		12 Months Ended
Financing Agreements (Details) - USD ($)	Apr. 21, 2022	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Oct. 26, 2023	Jul. 29, 2016
Financing agreements
Long-term Debt, Gross		$ 3,000,000,000	$ 3,000,000,000
Unsecured Debt [Abstract]
Long-term debt		2,971,000,000	2,968,000,000
Long-term debt		2,971,000,000	2,968,000,000
Loss on debt extinguishment		0	0	$ 8,000,000
CF Industries
Unsecured Debt [Abstract]
Debt Instrument, Unamortized Discount		6,000,000	7,000,000
Unamortized Debt Issuance Expense		23,000,000	$ 25,000,000
CF Industries \| Senior Credit Agreement
Debt Instruments
Available credit		750,000,000
Line of credit facility, amount outstanding		0
Letters of credit outstanding, amount		$ 0
Senior Notes \| CF Industries \| 3.450% due 2023
Financing agreements
Debt Instrument, Interest Rate, Effective Percentage		3.45%	3.45%
Unsecured Debt [Abstract]
Loss on debt extinguishment		$ (8,000,000)
Early Repayment of Senior Debt	$ 500,000,000
Extinguishment of Debt, Amount			$ 513,000,000
Senior Notes \| CF Industries \| 5.150% due 2034
Financing agreements
Debt Instrument, Interest Rate, Effective Percentage		5.15%	5.15%
Long-term Debt, Gross		$ 750,000,000	$ 750,000,000
Unsecured Debt [Abstract]
Long-term debt		$ 742,000,000	$ 741,000,000
Debt Instrument, Interest Rate, Effective Percentage		5.293%	5.293%
Senior Notes \| CF Industries \| 4.950% due 2043
Financing agreements
Debt Instrument, Interest Rate, Effective Percentage		4.95%	4.95%
Long-term Debt, Gross		$ 750,000,000	$ 750,000,000
Unsecured Debt [Abstract]
Long-term debt		$ 742,000,000	$ 742,000,000
Debt Instrument, Interest Rate, Effective Percentage		5.04%	5.04%
Senior Notes \| CF Industries \| 5.375% due 2044
Financing agreements
Debt Instrument, Interest Rate, Effective Percentage		5.375%	5.375%
Long-term Debt, Gross		$ 750,000,000	$ 750,000,000
Unsecured Debt [Abstract]
Long-term debt		$ 741,000,000	$ 741,000,000
Debt Instrument, Interest Rate, Effective Percentage		5.478%	5.478%
Senior Notes \| CF Industries \| 4.500% due December 2026(2)
Financing agreements
Debt Instrument, Interest Rate, Effective Percentage		4.50%	4.50%
Long-term Debt, Gross		$ 750,000,000	$ 750,000,000
Unsecured Debt [Abstract]
Long-term debt		$ 746,000,000	$ 744,000,000
Debt Instrument, Interest Rate, Effective Percentage		4.783%	4.783%
Revolving Credit Facility \| Line of Credit \| CF Industries \| Amendment No. 4 to the Third Amended and Restated Revolving Credit Agreement
Debt Instruments
Maximum borrowing capacity					$ 750,000,000
Letter of Credit \| Line of Credit
Debt Instruments
Maximum borrowing capacity		$ 425,000,000
Unsecured Debt [Abstract]
Line of Credit Facility, Fair Value of Amount Outstanding		$ 324,000,000
Letter of Credit \| Line of Credit \| CF Industries \| July 2016 Credit Agreement Amendment
Debt Instruments
Maximum borrowing capacity						$ 125,000,000