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Goodwill and Intangible Assets (Tables)
 12 Months Ended
Sep. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill Balances The carrying amount of goodwill attributable to each reportable segment with goodwill balances and the changes in those balances during the fiscal year ended September 30, 2024 are as follows

 

 

Reinforcement
Materials

 

 

Performance
Chemicals

 

 

Total

 

 

 

(In millions)

 

Balance at September 30, 2022

 

$

46

 

 

$

83

 

 

$

129

 

Foreign currency impact

 

 

5

 

 

 

-

 

 

 

5

 

Balance at September 30, 2023

 

 

51

 

 

 

83

 

 

 

134

 

Foreign currency impact

 

 

(3

)

 

 

2

 

 

 

(1

)

Balance at September 30, 2024

 

$

48

 

 

$

85

 

 

$

133

 

 

 

 

 

 

 

 

 

 

 

 
Schedule of Intangible Assets with Finite Lives

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

 

 

 

September 30, 2024

 

 

September 30, 2023

 

 

 

Gross
Carrying
Value

 

 

Accumulated
Amortization

 

 

Net
Intangible
Assets

 

 

Gross
Carrying
Value

 

 

Accumulated
Amortization

 

 

Net
Intangible
Assets

 

 

 

(In millions)

 

Developed technologies

 

$

34

 

 

$

(12

)

 

$

22

 

 

$

34

 

 

$

(10

)

 

$

24

 

Trademarks

 

 

2

 

 

 

(1

)

 

 

1

 

 

 

2

 

 

 

(1

)

 

 

1

 

Customer relationships

 

 

60

 

 

 

(30

)

 

 

30

 

 

 

65

 

 

 

(30

)

 

 

35

 

Total intangible assets

 

$

96

 

 

$

(43

)

 

$

53

 

 

$

101

 

 

$

(41

)

 

$

60