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Goodwill and Other Intangible Assets (Tables)
 3 Months Ended
Mar. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of carrying amount of goodwill by business segment
The following table shows the carrying amount of goodwill by reportable segment as of March 31, 2022 and December 31, 2021:
 
Ammonia(1)
Granular UreaUAN
AN(1)
Other(1)
Total
 (in millions)
Balance as of December 31, 2021$579 $828 $576 $69 $39 $2,091 
Effect of exchange rate changes— — — — — — 
Balance as of March 31, 2022$579 $828 $576 $69 $39 $2,091 
_______________________________________________________________________________
(1)At both March 31, 2022 and December 31, 2021, the carrying amount of goodwill includes accumulated impairment losses in our Ammonia, AN and Other segments of $9 million, $241 million and $35 million, respectively.
Schedule of the identifiable intangibles and their carrying values presented in other noncurrent assets on consolidated balance sheet
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:
 March 31, 2022December 31, 2021
 Gross
Carrying
Amount		Accumulated
Amortization		NetGross
Carrying
Amount		Accumulated
Amortization		Net
 (in millions)
Customer relationships(1)
$83 $(59)$24 $84 $(60)$24 
Trade names(1)
30 (10)20 31 (10)21 
Total intangible assets$113 $(69)$44 $115 $(70)$45 
_______________________________________________________________________________
(1)At both March 31, 2022 and December 31, 2021, the gross carrying amount for customer relationships and trade names includes cumulative impairment charges of $49 million and $1 million, respectively, which were recorded in 2021.