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ENVIRONMENTAL LIABILITIES AND EXPENDITURES (Details)
$ in Millions
 1 Months Ended 3 Months Ended
Jan. 31, 2025
USD ($)
Sep. 30, 2021
USD ($)
mi
Jun. 30, 2018
USD ($)
Mar. 31, 2016
mi
Mar. 31, 2025
USD ($)
site
category
operatingUnit
party
Environmental remediation reserves          
Number of sites | site         157
Current portion of environmental remediation liabilities         $ 150
Environmental remediation reserves, non-current, included in deferred credits and other liabilities - other         1,800
Remediation balance         1,901
Environmental reserves, exceeding $ ten million, threshold value         $ 10
Environmental reserves, exceeding $ ten million, threshold value, number of sites | site         17
Environmental reserves, range between zero to $ one million site category, number of sites | site         87
Environmental remediation additional loss range         $ 1,900
Potentially responsible parties | party         82
Low end of range          
Environmental remediation reserves          
Environmental reserves, range between zero to $ one million site category         $ 0
High end of range          
Environmental remediation reserves          
Environmental reserves, range between zero to $ one million site category         $ 1
Non-National Priorities List Sites          
Environmental remediation reserves          
Environmental remediation contingency, number of site categories | category         3
NPL Sites          
Environmental remediation reserves          
Number of sites | site         32
Remediation balance         $ 1,371
Third-Party Sites          
Environmental remediation reserves          
Number of sites | site         62
Remediation balance         $ 196
Currently Operated Sites          
Environmental remediation reserves          
Number of sites | site         12
Remediation balance         $ 86
Closed or Non-Operated Sites          
Environmental remediation reserves          
Number of sites | site         51
Remediation balance         $ 248
Diamond Alkali Superfund Site          
Environmental remediation reserves          
Site contingency, number of operating units | operatingUnit         4
Diamond Alkali Superfund Site - Operable Unit One          
Environmental remediation reserves          
Environmental remediation expense $ 16        
Diamond Alkali Superfund Site - Operable Unit Two          
Environmental remediation reserves          
Environmental remediation expense     $ 1,400    
Stretch of lower passaic river requiring remedial actions | mi       8.3  
Diamond Alkali Superfund Site - Operable Unit Four          
Environmental remediation reserves          
Environmental remediation expense   $ 440      
Stretch of lower passaic river requiring remedial actions | mi   17      
Stretch of lower passaic river not covered by remedial actions | mi   9