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v3.25.1

Debt and Other Financing Activities (Tables) | 6 Months Ended
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Mar. 31, 2025
Debt Disclosure [Abstract] |
Summary of Long-term Debt | The following table summarizes Ashland’s long-term debt as of:
(In millions) |  | March 31, 2025 |  |  | September 30, 2024 |
3.375% Senior Notes, due 2031 |  | $ | 450 |  |  | $ | 450 |
2.00% Senior Notes, due 2028 (Euro 500 million principal) |  |  | 541 |  |  |  | 558 |
6.875% Notes, due 2043 |  |  | 282 |  |  |  | 282 |
6.50% Junior Subordinated Notes, due 2029 |  |  | 70 |  |  |  | 67 |
Other(a) |  |  | 43 |  |  |  | (8 | )
Total debt |  |  | 1,386 |  |  |  | 1,349 |
Short-term debt |  |  | 50 |  |  |  | — |
Long-term debt (less debt issuance costs) |  | $ | 1,336 |  |  | $ | 1,349 |
(a) Other includes $11 million and $12 million of debt issuance costs as of March 31, 2025 and September 30, 2024, respectively. The current portion of the long-term debt was zero for both March 31, 2025 and September 30, 2024.

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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