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Note 28 - Cancellation of title deed in Saudi Steel Pipe Company (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2023
USD ($)
m²
Dec. 31, 2022
Dec. 31, 2021
Disclosure of geographical areas [line items]      
Proportion of ownership interest in subsidiary 50.00%    
SAUDI STEEL PIPE CO. and subsidiaries [Member]      
Disclosure of geographical areas [line items]      
Proportion of ownership interest in subsidiary 47.79%    
Saudi Arabia | SAUDI STEEL PIPE CO. and subsidiaries [Member]      
Disclosure of geographical areas [line items]      
Area of land (in square meters) | m² 811,284    
Proportion of ownership interest in subsidiary [1],[2] 47.79% 48.00% 48.00%
Land plots, carrying value | $ $ 56.2    
[1] All percentages rounded.
[2] Saudi Steel Pipe Co. is a public company listed in the Saudi Arabian Stock Exchange (Tadāwul), Tenaris holds 47.79% and has the right to nominate the majority of the votes of the board of directors, therefore Tenaris has control over SSPC. Since May, 2023, Saudi Steel Pipe Co. holds 57.3% of Global Pipe Company, therefore Tenaris has control over GPC.