XML 61 R55.htm IDEA: XBRL DOCUMENT v3.25.1
Goodwill and Other Intangible Assets - Summary of Goodwill by Reportable Segment (Details)
$ in Millions
 6 Months Ended
Mar. 31, 2025
USD ($)
Goodwill [Roll Forward]  
Balance at beginning of period $ 1,381
Currency translation (24)
Avoca business - divestiture (1) [1]
Balance at end of period 1,356
Life Sciences [Member]  
Goodwill [Roll Forward]  
Balance at beginning of period 822
Currency translation (15)
Avoca business - divestiture 0 [1]
Balance at end of period 807
Personal Care [Member]  
Goodwill [Roll Forward]  
Balance at beginning of period 125 [2]
Currency translation (1) [2]
Avoca business - divestiture (1) [1],[2]
Balance at end of period 123 [2]
Specialty Additives [Member]  
Goodwill [Roll Forward]  
Balance at beginning of period 434 [2]
Currency translation (8) [2]
Avoca business - divestiture 0 [1],[2]
Balance at end of period 426 [2]
Intermediates [Member]  
Goodwill [Roll Forward]  
Balance at beginning of period 0 [2]
Currency translation 0 [2]
Avoca business - divestiture 0 [1],[2]
Balance at end of period $ 0 [2]
[1] Ashland allocated $1 million to the Avoca disposal group during the six months ended March 31, 2025. See Note B of the Notes to the Condensed Consolidated Financial Statements for more information.
[2] As of March 31, 2025 and September 30, 2024, there were accumulated impairments of $356 million, $174 million and $90 million related to the Personal Care, Specialty Additives and Intermediates reportable segments, respectively.