XML 26 R1.htm IDEA: XBRL DOCUMENT v3.24.3
Document And Entity Information - USD ($)
$ in Billions
 12 Months Ended
Sep. 30, 2024
Oct. 31, 2024
Mar. 31, 2024
Cover [Abstract]      
Entity Registrant Name ASHLAND INC.    
Entity Central Index Key 0001674862    
Current Fiscal Year End Date --09-30    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
ICFR Auditor Attestation Flag true    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Document Financial Statement Error Correction [Flag] false    
Entity Public Float     $ 4.9
Entity Common Stock, Shares Outstanding   47,109,326  
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Trading Symbol ASH    
Document Type 10-K    
Amendment Flag false    
Document Period End Date Sep. 30, 2024    
Title of 12(b) Security Common Stock, par value $.01 per share    
Security Exchange Name NYSE    
Entity File Number 333-211719    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 81-2587835    
Entity Address, Address Line One 8145 Blazer Drive    
Entity Address, City or Town Wilmington    
Entity Address, State or Province DE    
Entity Address, Postal Zip Code 19808    
City Area Code 302    
Local Phone Number 995-3000    
Document Annual Report true    
Document Transition Report false    
Documents Incorporated by Reference

Portions of Registrant’s Proxy Statement (Proxy Statement) for its 2025 Annual Meeting of Stockholders are incorporated by reference into Part III of this Annual Report on Form 10-K to the extent described herein.

    
Auditor Name Ernst & Young LLP    
Auditor Location Grandview Heights, Ohio    
Auditor Firm ID 42