Goodwill and Other Intangible Assets
Goodwill
The following table shows the carrying amount of goodwill by reportable segment as of December 31, 2025 and 2024:     
AmmoniaGranular UreaUANANOtherTotal
(in millions)
Balance as of December 31, 2024$980 $828 $576 $69 $39 $2,492 
Effect of exchange rate changes— — — — 
Balance as of December 31, 2025$981 $828 $576 $69 $39 $2,493 
In November 2025, we experienced an incident in the AN upgrade area at our Yazoo City complex that required us to temporarily idle all production at the complex. We concluded that the incident necessitated evaluations of the long-lived assets within our North American AN asset group and the goodwill allocated to our North American AN reporting unit to determine if their fair value had declined to below their carrying value. The results of our goodwill impairment test concluded that the goodwill allocated to our North American AN reporting unit was not impaired. See Note 6—Property, Plant and Equipment—Net for additional information.
Other Intangible Assets
All of our identifiable intangible assets have definite lives and are presented on our consolidated balance sheets at gross carrying amount, net of accumulated amortization, as follows:
 December 31, 2025December 31, 2024
 Gross
Carrying
Amount
Accumulated
Amortization
NetGross
Carrying
Amount
Accumulated
Amortization
Net
 (in millions)
Customer relationships$505 $(91)$414 $505 $(66)$439 
Personal property tax agreement71 (12)59 71 (6)65 
Carbon credits— — — — 
Total intangible assets$576 $(103)$473 $579 $(72)$507 
Our customer relationships are being amortized over a weighted-average life of approximately 20 years. The intangible asset related to a favorable personal property tax agreement is being amortized over 12 years, representing the remaining term of the agreement as of December 1, 2023, the date of our acquisition of the Waggaman ammonia production facility.
For the years ended December 31, 2025, 2024 and 2023, amortization expense of our definite-lived intangible assets was approximately $32 million, $32 million and $5 million, respectively. Total estimated amortization expense for each of the five succeeding fiscal years is as follows:
 Estimated
Amortization
Expense
 (in millions)
2026$32 
202732 
202830 
202929 
203029 

Historical Timeline

Fiscal YearFiled
2025Feb 25, 2026Showing above
2024Feb 20, 2025
2023Feb 22, 2024
2022Feb 23, 2023
2021Feb 24, 2022
2020Feb 24, 2021
2019Feb 24, 2020
2018Feb 22, 2019
2017Feb 22, 2018
2016Feb 23, 2017
2015Feb 25, 2016

About Goodwill & Intangibles Disclosures

Goodwill and intangible asset disclosures reveal the premium paid in acquisitions and how management assesses whether that premium retains its value. Since goodwill is no longer amortized under US GAAP, the annual impairment test is the only mechanism that adjusts carrying values downward — making the assumptions behind that test critically important for investors.

Key signals: a history of goodwill impairments suggests management consistently overpays for acquisitions. Watch the gap between reporting unit fair value and carrying amount — when fair value exceeds carrying amount by less than 10-20%, a small decline in business performance could trigger a write-down. For finite-lived intangibles, examine useful life assumptions across customer relationships, technology, and trade names; aggressive estimates inflate near-term earnings. Compare total intangibles-to-total-assets ratios against peers to assess acquisition dependency. Rising goodwill as a percentage of equity can signal balance sheet fragility.