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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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Financing Agreements (Details) - USD ($)				12 Months Ended
Financing Agreements (Details) - USD ($)	Apr. 21, 2022	Sep. 10, 2021	Mar. 20, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 05, 2019	Jul. 29, 2016
Financing agreements
Long-term Debt, Gross				$ 3,000,000,000	$ 3,000,000,000
Unsecured Debt [Abstract]
Long-term debt				2,968,000,000	2,965,000,000
Long-term debt				2,968,000,000	2,965,000,000
Loss on debt extinguishment				0	8,000,000	$ 19,000,000
CF Industries
Unsecured Debt [Abstract]
Debt Instrument, Unamortized Discount				7,000,000	7,000,000
Unamortized Debt Issuance Expense				25,000,000	$ 28,000,000
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		$ (13,000,000)		$ (8,000,000)
Early Repayment of Senior Debt	$ 500,000,000	250,000,000
Debt Instrument, Face Amount		750,000,000
Extinguishment of Debt, Amount		$ 265,000,000			$ 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				$ 741,000,000	$ 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	$ 740,000,000
Debt Instrument, Interest Rate, Effective Percentage				5.478%	5.478%
Senior Notes \| CF Industries \| 3.400% due December 2021
Financing agreements
Debt Instrument, Interest Rate, Effective Percentage				3.40%	3.40%
Unsecured Debt [Abstract]
Loss on debt extinguishment			$ (6,000,000)
Early Repayment of Senior Debt			250,000,000
Extinguishment of Debt, Amount			$ 258,000,000
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				$ 744,000,000	$ 742,000,000
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				291,000,000
Line of Credit Facility, Increase (Decrease), Net				$ 75,000,000
Letter of Credit \| Line of Credit \| CF Industries \| July 2016 Credit Agreement Amendment
Debt Instruments
Maximum borrowing capacity								$ 125,000,000