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INVESTMENTS IN NON-CONSOLIDATED COMPANIES (Schedule of principal in non-consolidated companies) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disclosure of unconsolidated structured entities [line items]
Investments in non-consolidated companies	$ 821,571	$ 751,475	$ 471,306
Usinas Siderurgicas de Minas Gerais S.A. - USIMINAS
Disclosure of unconsolidated structured entities [line items]
Proportion of voting rights held by non-consolidated companies	20.40%
Investments in non-consolidated companies	$ 725,705	681,711	$ 422,948
Other non-consolidated companies
Disclosure of unconsolidated structured entities [line items]
Investments in non-consolidated companies	$ 5,307	$ 5,624
Brazil | Usinas Siderurgicas de Minas Gerais S.A. - USIMINAS
Disclosure of unconsolidated structured entities [line items]
Proportion of voting rights held by non-consolidated companies	34.39%	34.39%
Investments in non-consolidated companies	$ 725,705	$ 681,711
Mexico | Techgen S.A. de C.V.
Disclosure of unconsolidated structured entities [line items]
Proportion of voting rights held by non-consolidated companies	48.00%	48.00%
Investments in non-consolidated companies	$ 90,559	$ 64,140

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The amount of investments accounted for using the equity method. The equity method is a method of accounting whereby the investment is initially recognised at cost and adjusted thereafter for the post-acquisition change in the investor's share of net assets of the investee. The investor's profit or loss includes its share of the profit or loss of the investee. The investor's other comprehensive income includes its share of the other comprehensive income of the investee. [Refer: At cost [member]]

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 8
-IssueDate 2022-03-24
-Paragraph 24
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2022-en-r&anchor=para_24_a&doctype=Standard
-URIDate 2022-03-24

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2022-03-24
-Paragraph 54
-Subparagraph e
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_54_e&doctype=Standard
-URIDate 2022-03-24

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
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-IssueDate 2022-03-24
-Paragraph B16
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2022-en-r&anchor=para_B16&doctype=Appendix&subtype=B
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