v3.25.2
Litigation, Claims and Contingencies - Summary of Components of Environmental Remediation Expense Included within Selling, General and Administrative Expense (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Loss Contingencies [Line Items]        
Environmental expense $ 46 $ 43 $ 49 $ 50
Accretion 1 1 1 1
Legal expense 0 0 1 2
Total expense 47 44 51 53
Insurance receivable (3) (1) (4) (2)
Total expense, net of receivable activity [1] $ 44 $ 43 $ 47 $ 51
[1] Net expense of $14 million for the three and nine months ended June 30, 2025 and $8 million and $10 million for the three and nine months ended June 30, 2024, respectively, relates to divested businesses which qualified for treatment as discontinued operations for which certain environmental liabilities were retained by Ashland. These amounts are classified within the loss from discontinued operations, net of income taxes caption of the Statements of Condensed Consolidated Comprehensive Income (Loss).