BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Policies)	9 Months Ended
Sep. 30, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Consolidation	The consolidated financial statements consolidate our accounts and the accounts of our wholly owned subsidiaries, all subsidiaries in which we have a controlling interest and VIEs for which we are the primary beneficiary. All intercompany transactions and balances are eliminated upon consolidation.
Investment in Affiliates	We have investments in several businesses accounted for using the equity method of accounting. These investments are included within our Steelmaking segment. We review an investment for impairment when circumstances indicate that a loss in value below its carrying amount is other than temporary.
Recent Accounting Pronouncements	ACCOUNTING PRONOUNCEMENTS - ISSUED AND NOT EFFECTIVE In November 2024, the FASB issued ASU No. 2024-03, Income Statement—Reporting Comprehensive Income (Subtopic 220-40): Disaggregation of Income Statement Expenses. This new standard does not affect the recognition, measurement or financial statement presentation. However, this guidance does require additional annual and interim disclosures related to the disaggregation of various income statement expense captions. The amendments are effective for annual reporting periods beginning after December 15, 2026, and interim reporting periods beginning after December 15, 2027. In December 2025, the FASB issued ASU No. 2025-10, Government Grants (Topic 832): Accounting for Government Grants Received by Business Entities. The new standard establishes guidance for the recognition, measurement, presentation, and disclosure of government grants received by business entities, including grants related to assets and grants related to income. The amendments are effective for interim and annual reporting periods beginning after December 15, 2028. We plan to early adopt this standard beginning January 1, 2027 and do not expect the adoption to have a material impact on our consolidated financial statements.

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Policies)

9 Months Ended

Sep. 30, 2026

Organization, Consolidation and Presentation of Financial Statements [Abstract]

The consolidated financial statements consolidate our accounts and the accounts of our wholly owned subsidiaries, all subsidiaries in which we have a controlling interest and VIEs for which we are the primary beneficiary. All intercompany transactions and balances are eliminated upon consolidation.

Investment in Affiliates

We have investments in several businesses accounted for using the equity method of accounting. These investments are included within our Steelmaking segment. We review an investment for impairment when circumstances indicate that a loss in value below its carrying amount is other than temporary.

Recent Accounting Pronouncements

ACCOUNTING PRONOUNCEMENTS - ISSUED AND NOT EFFECTIVE

In November 2024, the FASB issued ASU No. 2024-03, Income Statement—Reporting Comprehensive Income (Subtopic 220-40): Disaggregation of Income Statement Expenses. This new standard does not affect the recognition, measurement or financial statement presentation. However, this guidance does require additional annual and interim disclosures related to the disaggregation of various income statement expense captions. The amendments are effective for annual reporting periods beginning after December 15, 2026, and interim reporting periods beginning after December 15, 2027.

In December 2025, the FASB issued ASU No. 2025-10, Government Grants (Topic 832): Accounting for Government Grants Received by Business Entities. The new standard establishes guidance for the recognition, measurement, presentation, and disclosure of government grants received by business entities, including grants related to assets and grants related to income. The amendments are effective for interim and annual reporting periods beginning after December 15, 2028. We plan to early adopt this standard beginning January 1, 2027 and do not expect the adoption to have a material impact on our consolidated financial statements.