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Debt and Other Financing Activities (Tables)
 6 Months Ended
Mar. 31, 2026
Debt Disclosure [Abstract]  
Summary of Long-term Debt

The following table summarizes Ashland’s long-term debt as of:

 

(In millions)

 

March 31, 2026

 

 

September 30, 2025

 

3.375% Senior Notes, due 2031

 

$

450

 

 

$

450

 

2.00% Senior Notes, due 2028 (Euro 500 million principal)

 

 

573

 

 

 

586

 

6.875% Notes, due 2043

 

 

282

 

 

 

282

 

6.50% Junior Subordinated Notes, due 2029

 

 

74

 

 

 

72

 

Other(a)

 

 

(5

)

 

 

(6

)

Long-term debt (less debt issuance costs)(b)

 

$

1,374

 

 

$

1,384

 

 

 

 

 

 

 

 
(a)
Other includes $9 million and $10 million of debt issuance costs as of March 31, 2026 and September 30, 2025, respectively.
(b)
The current portion of the long-term debt was zero for both March 31, 2026 and September 30, 2025.
Schedule of Obligations Confirmed and Paid A rollforward of obligations confirmed and paid is presented below:

 

(In millions)

Three months ended March 31, 2026

 

 

Six months ended March 31, 2026

 

Confirmed obligations outstanding at beginning of period

$

4

 

 

$

—

 

Invoices confirmed during the period

 

5

 

 

 

10

 

Confirmed invoices paid during the period

 

(4

)

 

 

(5

)

Confirmed obligations outstanding at end of period

$

5

 

 

$

5