ENVIRONMENTAL LIABILITIES AND EXPENDITURES (Details)	1 Months Ended					3 Months Ended	9 Months Ended
	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($) party	Sep. 30, 2021 USD ($) mi	Jun. 30, 2018 USD ($)	Mar. 31, 2016 mi	Sep. 30, 2016 party	Sep. 30, 2023 USD ($) site segment
Environmental remediation reserves
Number of Sites | site							160
Current portion of environmental remediation liabilities							$ 141,000,000
Environmental loss contingency, statement of financial position							Environmental remediation reserves, non-current, included in deferred credits and other liabilities - other, Accrued liabilities
Environmental remediation reserves, non-current, included in deferred credits and other liabilities - other		$ 905,000,000					$ 860,000,000
Remediation Balance							1,001,000,000
Environmental reserves, exceeding $ ten million, threshold value							$ 10,000,000
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							95
Percent of reserve to be funded over the next three to four years							45.00%
Period of expending remaining environmental reserves (or more)							10 years
Environmental remediation additional loss range							$ 2,700,000,000
Subsidiaries
Environmental remediation reserves
Number of Sites | site							160
Low end of range
Environmental remediation reserves
Environmental reserves, range between zero to $ one million site category							$ 0
Period of expending first half 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 first half of environmental reserves							4 years
Non-National Priorities List Sites
Environmental remediation reserves
Environmental remediation contingency, number of site categories | site							3
NPL Sites
Environmental remediation reserves
Number of Sites | site							31
Remediation Balance							$ 436,000,000
Third-Party Sites
Environmental remediation reserves
Number of Sites | site							65
Remediation Balance							$ 216,000,000
Currently Operated Sites
Environmental remediation reserves
Number of Sites | site							13
Remediation Balance							$ 98,000,000
Closed or Non-Operated Sites
Environmental remediation reserves
Number of Sites | site							51
Remediation Balance							$ 251,000,000
Diamond Alkali Superfund Site
Environmental remediation reserves
Site contingency, number of operating units | segment							4
Diamond Alkali Superfund Site - Operable Unit Two
Environmental remediation reserves
Stretch of lower passaic river requiring remedial actions | mi					8.3
Number of parties notified to pay the cost | party						100
Environmental remediation expense				$ 1,400,000,000
Diamond Alkali Superfund Site - Operable Unit Four
Environmental remediation reserves
Stretch of lower passaic river requiring remedial actions | mi			17
Environmental remediation expense			$ 440,000,000
Stretch of lower passaic river not covered by remedial actions | mi			9
Financial assurance	$ 93,000,000
Alden Leeds
Environmental remediation reserves
Number of parties, settled | party		85
Alden Leeds | Alden Leeds
Environmental remediation reserves
Environmental remediation expense		$ 150,000,000
Financial assurance							$ 93,000,000
Number of parties, settled | party		85