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Equity Method Investment	9 Months Ended
Equity Method Investment	Sep. 30, 2023
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investment	We have a 50% ownership interest in Point Lisas Nitrogen Limited (PLNL), which operates an ammonia production facility in the Republic of Trinidad and Tobago. 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 had an expiration date of September 2023. In the third quarter of 2023, PLNL entered into a new gas sales contract with NGC (the New NGC Contract), which is effective October 2023 through December 2025. In the third quarter of 2023 and due to the terms of the New NGC Contract, 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 (losses) earnings of operating affiliate on our consolidated statements of operations for the three and nine months ended September 30, 2023. As of September 30, 2023, the total carrying value of our equity method investment in PLNL was $32 million. 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 $20 million and $115 million for the three and nine months ended September 30, 2023, respectively, and $61 million and $212 million for the three and nine months ended September 30, 2022, respectively.