ENVIRONMENTAL LIABILITIES AND EXPENDITURES (Details)	1 Months Ended				12 Months Ended
	Jan. 31, 2025 USD ($)	Sep. 30, 2021 USD ($) mi	Jun. 30, 2018 USD ($)	Mar. 31, 2016 mi	Dec. 31, 2024 USD ($) site segment	Dec. 31, 2023 USD ($) site	Dec. 31, 2022 USD ($)
Environmental remediation reserves
Number of sites | site					158	160
Remediation balance					$ 1,909,000,000	$ 1,021,000,000
Environmental reserves, exceeding $ ten million, threshold value					$ 10,000,000
Environmental reserves, exceeding $ ten million, number of sites | site					16
Environmental reserves, range between zero to $ one million site category, number of sites | site					88
Environmental remediation expense, statement of income or comprehensive income					Other operating and non-operating expense	Other operating and non-operating expense	Other operating and non-operating expense
Remediation expenses					$ 76,000,000	$ 79,000,000	$ 65,000,000
Percent of reserve to be funded over the next three to four years					25.00%
Minimum period of expending second half of environmental reserves					10 years
Environmental remediation additional loss range					$ 1,900,000,000
Low end of range
Environmental remediation reserves
Period of expending 40 percent of environmental reserves					3 years
High end of range
Environmental remediation reserves
Environmental reserves, range between zero to $ one million site category					$ 1,000,000
Period of expending 40 percent of environmental reserves					4 years
Non-National Priorities List Sites
Environmental remediation reserves
Number of site categories | site					3
NPL Sites
Environmental remediation reserves
Number of sites | site					32	32
Remediation balance					$ 1,374,000,000	$ 435,000,000
Third-Party Sites
Environmental remediation reserves
Number of sites | site					63	65
Remediation balance					$ 200,000,000	$ 233,000,000
Number of sites with significant environmental remediation reserves | site					5
Currently Operated Sites
Environmental remediation reserves
Number of sites | site					12	12
Remediation balance					$ 88,000,000	$ 98,000,000
Number of sites with significant environmental remediation reserves | site					3
Closed or Non-operated Sites
Environmental remediation reserves
Number of sites | site					51	51
Remediation balance					$ 247,000,000	$ 255,000,000
Number of sites with significant environmental remediation reserves | site					7
Diamond Alkali Superfund Site
Environmental remediation reserves
Number of operating units | segment					4
Diamond Alkali Superfund Site - Operable Unit One | Subsequent event
Environmental remediation reserves
Remediation expenses	$ 16,000,000
Diamond Alkali Superfund Site - Operable Unit Two
Environmental remediation reserves
Remediation expenses			$ 1,400,000,000
Stretch of lower passaic river requiring remedial actions | mi				8.3
Diamond Alkali Superfund Site - Operable Unit Four
Environmental remediation reserves
Remediation expenses		$ 440,000,000
Stretch of lower passaic river requiring remedial actions | mi		17
River stretch which may require remedial actions | mi		9
Alden Leeds | Alden Leeds
Environmental remediation reserves
Increase in environmental remediation liability					$ 925,000,000
Remediation expenses							$ 150,000,000
Accrued liabilities
Environmental remediation reserves
Environmental loss contingency, statement of financial position					Accrued liabilities	Accrued liabilities
Remediation balance					$ 150,000,000	$ 132,000,000
Accrued Environmental Loss Contingencies, Noncurrent
Environmental remediation reserves
Environmental loss contingency, statement of financial position					Other deferred credits and liabilities	Other deferred credits and liabilities
Remediation balance					$ 1,800,000,000	$ 900,000,000