v3.25.2
Equity Items - Summary of Reconciliation of Changes in Stockholders' Equity (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 9 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Balance, beginning of period     $ 2,868  
Balance, end of period $ 1,889 $ 2,967 $ 1,889 $ 2,967
Cash dividends declared per common share $ 0.415 $ 0.405 $ 1.225 $ 1.175
Common Stock and Paid in Capital [Member]        
Balance, beginning of period $ 1 $ 6 $ 1 $ 5
Common shares issued under stock incentive and other plans [1] 2 1 8 4
Common shares purchased under repurchase program [2],[3] 0 (7) (6) (9)
Balance, end of period 3 0 3 0
Retained earnings [Member]        
Balance, beginning of period 3,048 3,604 3,315 3,595
Net income (loss) (742) 6 (877) 153
Regular dividends (20) (20) (57) (59)
Common shares purchased under repurchase program [2],[3] 0 (124) (95) (223)
Balance, end of period 2,286 3,466 2,286 3,466
Accumulated other comprehensive loss [Member]        
Balance, beginning of period (490) (476) (448) (503)
Unrealized translation gain (loss) 91 (25) 46 2
Unrealized gain (loss) on commodity hedges (1) 2 2 2
Balance, end of period $ (400) $ (499) $ (400) $ (499)
[1] Common stock issued were 11,423 and 18,909 for the three months ended June 30, 2025 and 2024, respectively, and 139,824 and 129,716 for the nine months ended June 30, 2025 and 2024, respectively. Includes $1 million for both the three months ended June 30, 2025 and 2024, and $4 million and $5 million for the nine months ended June 30, 2025 and 2024, respectively, associated with stock-based compensation employee withholding taxes.
[2] Common stock repurchased were zero and 1,541,320 for the three and nine months ended June 30, 2025, respectively, and 1,314,485 and 2,552,697 for the three and nine months ended June 30, 2024, respectively.
[3] Includes zero and $1 million in excise tax on common stock repurchases for the three and nine months ended June 30, 2025, respectively, and $1 million and $2 million for the three and nine months ended June 30, 2024, respectively. Ashland paid a total of zero and $100 million for the three and nine months ended June 30, 2025, respectively, and $130 million and $230 million for the three and nine months ended June 30, 2024, respectively, for common stock repurchases.