v3.26.1
Transactions with Related Parties - Additional Information (Details) - EBP 010 - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
Fair value $ 1,369,226 $ 1,303,068
Fees paid $ 445  
Fidelity Management Trust Company | Ashland Inc. Common Stock    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
Number of shares held 454,251 499,309
Fair value $ 26,641 $ 35,711
Dividend received on common stock 820  
Fees paid $ 445