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Equity Method Investments	12 Months Ended
Equity Method Investments	Dec. 31, 2025
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments	Equity Method Investment We have a 50% ownership interest in PLNL, which operates an ammonia production facility in Trinidad. We include our share of the net earnings from this equity method investment as an element of earnings from operations because PLNL provides additional production to our operations and is integrated with our other supply chain and sales activities in the Ammonia segment. PLNL operates an ammonia plant that relies on natural gas supplied, under a gas sales contract (the NGC Contract), by The National Gas Company of Trinidad and Tobago Limited (NGC). The NGC Contract was scheduled to expire on January 1, 2026. NGC and PLNL have entered into short-term extension letter agreements that provide for the continued supply of gas while the parties seek to negotiate terms and conditions for a new gas sales contract for 2026. Any NGC commitment to supply gas is dependent on mutual agreement of such terms and conditions between NGC and PLNL. Furthermore, any NGC commitment to supply gas beyond 2026 would require further negotiations between NGC and PLNL. If NGC does not make sufficient quantities of natural gas available to PLNL at prices and terms that permit profitable operations, PLNL may cease operating its facility, which would trigger an impairment assessment of our remaining investment in PLNL. As of December 31, 2025, the total carrying value of our equity method investment in PLNL was $32 million. In the third quarter of 2023, PLNL entered into the NGC Contract, which replaced the previous gas sales contract that PLNL had with NGC. Due to the terms of the NGC Contract, in the third quarter of 2023, we assessed our investment in PLNL for impairment and determined that the carrying value of our equity method investment in PLNL exceeded its fair value. As a result, we recorded an impairment of our equity method investment in PLNL of $43 million, which is reflected in equity in earnings (loss) of operating affiliate on our consolidated statement of operations for the year ended December 31, 2023. We have transactions in the normal course of business with PLNL reflecting our obligation to purchase 50% of the ammonia produced by PLNL at current market prices. Our ammonia purchases from PLNL totaled $120 million, $90 million and $142 million in 2025, 2024 and 2023, respectively.