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Note 21 - Borrowings - Significant Borrowings as of Closing Date (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of detailed information about borrowings [line items]      
Significant borrowings as of closing date $ 437,398 $ 583,437 $ 728,762
Significant borrowings as of closing date [member] | Tubos De Acero De Mexico, SA [Member]      
Disclosure of detailed information about borrowings [line items]      
Significant borrowings as of closing date 200,000    
Significant borrowings one, as of closing date [member] | TENARIS TUBOCARIBE Ltda. [Member]      
Disclosure of detailed information about borrowings [line items]      
Significant borrowings as of closing date 40,000    
Significant borrowings two, as of closing date [member] | Global Pipe Company [Member]      
Disclosure of detailed information about borrowings [line items]      
Significant borrowings as of closing date 26,000    
Significant borrowings three, as of closing date [member] | Siderca SAIC [Member]      
Disclosure of detailed information about borrowings [line items]      
Significant borrowings as of closing date $ 20,000