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Goodwill and Intangible Assets
9 Months Ended
Jun. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets

D. Goodwill and Intangible Assets

The carrying amount of goodwill attributable to each reportable segment and the changes in those balances during the nine months ended June 30, 2025 are as follows:

 

 

 

Reinforcement
Materials

 

 

Performance
Chemicals

 

 

Total

 

 

 

(In millions)

 

Balance at September 30, 2024

 

$

48

 

 

$

85

 

 

$

133

 

Foreign currency impact

 

 

1

 

 

 

(1

)

 

 

 

Balance at June 30, 2025

 

$

49

 

 

$

84

 

 

$

133

 

 

The following table provides information regarding the Company’s intangible assets:

 

 

 

June 30, 2025

 

 

September 30, 2024

 

 

 

Gross
Carrying
Value

 

 

Accumulated
Amortization

 

 

Net
Intangible
Assets

 

 

Gross
Carrying
Value

 

 

Accumulated
Amortization

 

 

Net
Intangible
Assets

 

 

 

(In millions)

 

Intangible assets with finite lives

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Developed technologies(1)

 

$

41

 

 

$

(14

)

 

$

27

 

 

$

34

 

 

$

(12

)

 

$

22

 

Trademarks

 

 

2

 

 

 

(1

)

 

 

1

 

 

 

2

 

 

 

(1

)

 

 

1

 

Customer relationships

 

 

62

 

 

 

(34

)

 

 

28

 

 

 

60

 

 

 

(30

)

 

 

30

 

Total intangible assets

 

$

105

 

 

$

(49

)

 

$

56

 

 

$

96

 

 

$

(43

)

 

$

53

 

(1)
Included within Developed technologies as of June 30, 2025 is $8 million of intangible assets acquired during the first quarter of fiscal 2025 as discussed in Note C above.

 

Intangible assets are amortized over their estimated useful lives, which range between ten and twenty-five years, with a weighted average amortization period of approximately sixteen years. Amortization expense was $2 million and $1 million for the three months ended June 30, 2025 and 2024, respectively. Amortization expense was $5 million and $4 million for the nine months ended June 30, 2025 and 2024, respectively. Amortization expense is included in Cost of sales, Selling and administrative expenses and Research and technical expenses in the Consolidated Statements of Operations. Total amortization expense is estimated to be approximately $6 million each year for the next five fiscal years.