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Note 13 - Investments in Non-consolidated Companies - Principal 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]

Value

$ 1,540,646

$ 1,383,774

$ 957,352

Ternium S.A. [member]

Disclosure of unconsolidated structured entities [line items]

Percentage of ownership

11.46%

Value

$ 1,363,600

Ternium S.A. [member] | LUXEMBOURG

Disclosure of unconsolidated structured entities [line items]

Percentage of ownership

^[1]

11.46%

11.46%

Value

^[1]

$ 1,363,607

$ 1,210,206

Usiminas [member]

Disclosure of unconsolidated structured entities [line items]

Percentage of ownership

3.07%

Value

$ 109,500

Usiminas [member] | Brazil

Disclosure of unconsolidated structured entities [line items]

Percentage of ownership

^[2]

3.07%

3.07%

Value

^[2]

$ 109,534

$ 103,106

Techgen s.a. [member]

Disclosure of unconsolidated structured entities [line items]

Percentage of ownership

22.00%

Techgen s.a. [member] | Mexico

Disclosure of unconsolidated structured entities [line items]

Percentage of ownership

22.00%

22.00%

Value

$ 41,506

$ 29,397

Global Pipe Company [Member]

Disclosure of unconsolidated structured entities [line items]

Percentage of ownership

35.00%

Value

$ 23,000

Global Pipe Company [Member] | SAUDI ARABIA

Disclosure of unconsolidated structured entities [line items]

Percentage of ownership

35.00%

35.00%

Value

$ 23,022

$ 21,523

Other [member]

Disclosure of unconsolidated structured entities [line items]

Value

$ 2,977

$ 19,542

[1]	Including treasury shares.
[2]	At December 31,2022 and 2021the voting rights were 5.19%.

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

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- Definition

The amount of investments in subsidiaries, joint ventures and associates in an entity's separate financial statements. [Refer: Associates [member]; Joint ventures [member]; Subsidiaries [member]; Investments in subsidiaries reported in separate financial statements]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2022-03-24
-Paragraph 10
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-URIDate 2022-03-24

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X

- Definition

The proportion of ownership interest in an associate attributable to the entity. [Refer: Associates [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2022-03-24
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