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Segment Disclosures (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2021 | Sep. 30, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Segment reporting information |  |  |  |  |
Net sales |  |  | $ 6,538 | $ 4,124 | $ 4,590
Long-lived and intangible asset impairment |  | $ 236 | 236 | 0 | 0
Goodwill impairment | $ 26 | $ 259 | 285 | 0 | 0
Ammonia |  |  |  |  |
Segment reporting information |  |  |  |  |
Net sales |  |  | 1,787 | 1,020 | 1,113
Goodwill impairment |  |  | 9 |  |
Granular Urea |  |  |  |  |
Segment reporting information |  |  |  |  |
Net sales |  |  | 1,880 | 1,248 | 1,342
Goodwill impairment |  |  | 0 |  |
UAN |  |  |  |  |
Segment reporting information |  |  |  |  |
Net sales |  |  | 1,788 | 1,063 | 1,270
Goodwill impairment |  |  | 0 |  |
AN |  |  |  |  |
Segment reporting information |  |  |  |  |
Net sales |  |  | 510 | 455 | 506
Goodwill impairment |  |  | 241 |  |
Other |  |  |  |  |
Segment reporting information |  |  |  |  |
Goodwill impairment |  |  | 35 |  |
Operating segments | Ammonia |  |  |  |  |
Segment reporting information |  |  |  |  |
Net sales |  |  | 1,787 | 1,020 | 1,113
Operating segments | Granular Urea |  |  |  |  |
Segment reporting information |  |  |  |  |
Net sales |  |  | 1,880 | 1,248 | 1,342
Operating segments | UAN |  |  |  |  |
Segment reporting information |  |  |  |  |
Net sales |  |  | 1,788 | 1,063 | 1,270
Operating segments | AN |  |  |  |  |
Segment reporting information |  |  |  |  |
Net sales |  |  | 510 | 455 | 506
Operating segments | Other |  |  |  |  |
Segment reporting information |  |  |  |  |
Net sales |  |  | $ 573 | $ 338 | $ 359

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