XML 81 R75.htm IDEA: XBRL DOCUMENT v3.25.1
Litigation, Claims and Contingencies - Additional Information (Details)
$ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2025
USD ($)
Facility
ServiceStationProperty
Site
Mar. 31, 2025
USD ($)
Facility
ServiceStationProperty
Site
Mar. 31, 2024
USD ($)
Sep. 30, 2024
USD ($)
Sep. 30, 2023
USD ($)
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Asbestos litigation cost projection [Abstract]              
Number of Years Included in Asbestos Assumption   40 years          
Environmental Remediation Costs Recognized [Abstract]              
Number of sites were company is identified as a potentially responsible party under the superfund or similar state law | Site 53 53          
Number of current and former operating facilities subject to various environmental laws | Facility 108 108          
Total number of service station properties subject to various environmental laws | ServiceStationProperty 1,225 1,225          
Number of service stations being actively remediated | ServiceStationProperty 14 14          
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration] Other liabilities Other liabilities          
Accrual for environmental loss contingencies $ 207 $ 207 $ 198 $ 221 $ 214    
Accrued environmental loss contingencies, noncurrent 150 150   164      
Recorded third-party environmental recoveries receivables 12 12   13      
Recorded third-party environmental recoveries, noncurrent 10 $ 10   11      
Environmental exit costs, reasonably possible additional loss $ 465            
Maximum reserve for remediation reserve related to any one site (in hundredths) 22.00% 22.00%          
Ashland [Member]              
Asbestos reserve [Roll Forward]              
Increase (decrease) in asbestos related reserve   $ 0 0 24 9 $ 16  
Movement in Loss Contingency Receivable, Increase (Decrease) [Roll Forward]              
Insurance receivable $ 95 [1] 95 [1] 91 [1] 97 [1] 95 [1] 101 [1] $ 100
Receivable adjustment       11      
Asbestos litigation cost projection [Abstract]              
Possible total future litigation defense and claim settlement costs 410 410          
Total reserves for asbestos claims 256 [2] 256 [2] 263 [2] 274 [2] 281 [2] 305 [2] 320
Hercules [Member]              
Asbestos reserve [Roll Forward]              
Increase (decrease) in asbestos related reserve   0 0 14 (2) 15  
Movement in Loss Contingency Receivable, Increase (Decrease) [Roll Forward]              
Insurance receivable 46 [3] 46 [3] 45 [3] 50 [3] 47 [3] 52 [3] 47
Receivable adjustment       6      
Asbestos litigation cost projection [Abstract]              
Possible total future litigation defense and claim settlement costs 276 276          
Total reserves for asbestos claims $ 180 [4] $ 180 [4] $ 180 [4] $ 185 [4] $ 191 [4] $ 213 [4] $ 217
[1] Includes $9 million classified in accounts receivable, net on the Condensed Consolidated Balance Sheets at March 31, 2025 and September 30, 2024.
[2] Includes $28 million classified in accrued expenses and other liabilities on the Condensed Consolidated Balance Sheets as of March 31, 2025 and September 30, 2024.
[3] Includes $6 million classified in accounts receivable, net on the Condensed Consolidated Balance Sheets at March 31, 2025 and September 30, 2024.
[4] Includes $17 million classified in accrued expenses and other liabilities on the Condensed Consolidated Balance Sheets at March 31, 2025 and September 30, 2024.