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Goodwill and Other Intangible Assets Goodwill and Other Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
The following table shows the carrying amount of goodwill by reportable segment as of December 31, 2021 and 2020:             
AmmoniaGranular UreaUANANOtherTotal
(in millions)
Balance as of December 31, 2020$587 $828 $576 $310 $73 $2,374 
Impairment losses(9)— — (241)(35)(285)
Effect of exchange rate changes1 — — — 1 2 
Balance as of December 31, 2021$579 $828 $576 $69 $39 $2,091 
Schedule of Finite-Lived Intangible Assets
All of our identifiable intangible assets have definite lives and are presented in other assets on our consolidated balance sheets at gross carrying amount, net of accumulated amortization, as follows:
 December 31, 2021December 31, 2020
 
Gross
Carrying
Amount(1)
Accumulated
Amortization		NetGross
Carrying
Amount		Accumulated
Amortization		Net
 (in millions)
Customer relationships$84 $(60)$24 $133 $(52)$81 
Trade names31 (10)21 32 (9)23 
Total intangible assets$115 $(70)$45 $165 $(61)$104 
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(1)As of December 31, 2021, the gross carrying amount for customer relationships and trade names include impairment charges in 2021 of $49 million and $1 million, respectively.
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense Total estimated amortization expense for each of the fiscal years 2022-2026 is $4 million.