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ENVIRONMENTAL LIABILITIES AND EXPENDITURES (Details) | 1 Months Ended | 12 Months Ended
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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 |

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