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Financing Agreements
 12 Months Ended
Dec. 31, 2023
Debt Disclosure [Abstract]  
Financing Agreements Financing Agreements
Revolving Credit Agreement
On October 26, 2023, we entered into a new senior unsecured revolving credit agreement (the New Revolving Credit Agreement), which replaced our prior senior unsecured revolving credit agreement (the Prior Revolving Credit Agreement) that was scheduled to mature on December 5, 2024.
The New Revolving Credit Agreement provides for a revolving credit facility of up to $750 million with a maturity of October 26, 2028 and includes a letter of credit sub-limit of $125 million. Borrowings under the New Revolving Credit Agreement may be used for working capital, capital expenditures, acquisitions, share repurchases and other general corporate purposes. CF Industries is the lead borrower, and CF Holdings is the sole guarantor, under the New Revolving Credit Agreement.
Borrowings under the New Revolving Credit Agreement can be denominated in U.S. dollars, Canadian dollars, euros and British pounds. Borrowings under the New Revolving Credit Agreement in U.S. dollars bear interest at a per annum rate equal to, at our option, an applicable adjusted term Secured Overnight Financing Rate or base rate plus, in either case, a specified margin. We are required to pay an undrawn commitment fee on the undrawn portion of the commitments under the New Revolving Credit Agreement and customary letter of credit fees. The specified margin and the amount of the commitment fee depend on CF Holdings’ credit rating at the time.
As of December 31, 2023, we had unused borrowing capacity under the New Revolving Credit Agreement of $750 million and no outstanding letters of credit. As of December 31, 2023 and 2022, and during the years ended, there were no borrowings outstanding under either the Prior Revolving Credit Agreement or the New Revolving Credit Agreement.
The New Revolving Credit Agreement contains representations and warranties and affirmative and negative covenants, including a financial covenant. As of December 31, 2023, we were in compliance with all covenants under the New Revolving Credit Agreement.
Letters of Credit Under Bilateral Agreement
We are party to a bilateral agreement providing for the issuance of up to $425 million (reflecting an increase of $75 million in December 2023) of letters of credit. As of December 31, 2023, approximately $291 million of letters of credit were outstanding under this agreement.
Senior Notes
Long-term debt presented on our consolidated balance sheets as of December 31, 2023 and 2022 consisted of the following debt securities issued by CF Industries:
 Effective Interest RateDecember 31, 2023December 31, 2022
 Principal
Carrying Amount(1)
Principal
Carrying Amount(1)
(in millions)
Public Senior Notes:
5.150% due March 2034
5.293%$750 $741 $750 $741 
4.950% due June 2043
5.040%750 742 750 742 
5.375% due March 2044
5.478%750 741 750 740 
Senior Secured Notes:
4.500% due December 2026(2)
4.783%750 744 750 742 
Total long-term debt$3,000 $2,968 $3,000 $2,965 
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(1)Carrying amount is net of unamortized debt discount and deferred debt issuance costs. Total unamortized debt discount was $7 million as of both December 31, 2023 and 2022, and total deferred debt issuance costs were $25 million and $28 million as of December 31, 2023 and 2022, respectively.
(2)Effective August 23, 2021, these notes are no longer secured, in accordance with the terms of the applicable indenture. 
Under the indentures (including the applicable supplemental indentures) governing the senior notes due 2034, 2043 and 2044 identified in the table above (the Public Senior Notes), each series of Public Senior Notes is guaranteed by CF Holdings.
Under the terms of the indenture governing the 4.500% senior secured notes due December 2026 (the 2026 Notes) identified in the table above, the 2026 Notes are guaranteed by CF Holdings.
Interest on the Public Senior Notes and the 2026 Notes is payable semiannually, and the Public Senior Notes and the 2026 Notes are redeemable at our option, in whole at any time or in part from time to time, at specified make-whole redemption prices.
On April 21, 2022, we redeemed in full all of the $500 million outstanding principal amount of the 3.450% senior notes due June 2023 (the 2023 Notes) in accordance with the optional redemption provisions in the indenture governing the 2023 Notes. The total aggregate redemption price paid in connection with the April 2022 redemption of the 2023 Notes, which was funded with cash on hand, was $513 million, including accrued interest. As a result, we recognized a loss on debt extinguishment of $8 million, consisting primarily of the premium paid on the redemption of the $500 million principal amount of the 2023 Notes prior to their scheduled maturity.
On September 10, 2021, we redeemed $250 million principal amount, representing one-third of the $750 million principal amount outstanding immediately prior to such redemption, of the 2023 Notes, in accordance with the optional redemption provisions in the indenture governing the 2023 Notes. The total aggregate redemption price paid in connection with the redemption of the $250 million principal amount of the 2023 Notes was approximately $265 million, including accrued interest. As a result, we recognized a loss on debt extinguishment of $13 million in 2021, consisting primarily of a premium paid on the redemption of the $250 million principal amount of the 2023 Notes prior to their scheduled maturity.
On March 20, 2021, we redeemed in full all of the $250 million outstanding principal amount of the 3.400% senior secured notes due December 2021 (the 2021 Notes), in accordance with the optional redemption provisions in the indenture governing the 2021 Notes. The total aggregate redemption price paid in connection with the redemption of the 2021 Notes, which was funded with cash on hand, was $258 million, including accrued interest. As a result, we recognized a loss on debt extinguishment of $6 million, consisting primarily of the premium paid on the redemption of the $250 million principal amount of the 2021 Notes prior to their scheduled maturity.