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Equity Method Investment-Narrative (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Equity method investments |  |
Obligation to purchase ammonia (as a percent) | 50.00% |
Operating equity method investments | Maximum | Property, plant and equipment |  |
Equity method investments |  |
Number of years that the increased basis for property, plant and equipment and identifiable intangibles will be amortized | 11 years |
Point Lisas Nitrogen Limited (PLNL) | Operating equity method investments |  |
Equity method investments |  |
Ownership interest (as a percent) | 50.00% |
Equity Method Investment | $ 84 |
Carrying value of investments in excess of the entity's share of the affiliates' book value | 38 |
Purchases of ammonia from PLNL | $ 74 | $ 26

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