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Note 34 - Nationalization of Venezuelan Subsidiaries (Details Textual) - TALTA—TRADING E MARKETING SOCIEDADE UNIPESSOAL LDA. [member] - VENEZUELA - USD ($)
$ in Millions
 12 Months Ended
Dec. 12, 2016
Jan. 29, 2016
Dec. 31, 2022
Jan. 25, 2023
Nov. 05, 2021
Aug. 24, 2021
Jul. 17, 2020
Awards purchase agreement [member]              
Disclosure of subsidiaries [line items]              
Purchase agreement       $ 81.0      
Non-refundable signing payment as reimbursement of expenses       $ 1.0      
Matesi Materiales Siderúrgicos S.A [member] | ICSID in Washington D.C. [member]              
Disclosure of subsidiaries [line items]              
Nationalization of subsidiaries, compensation award not including pre-award interest   $ 87.3          
Nationalization of subsidiaries, pre-award interest   85.5          
Nationalization of subsidiaries, compensation award including pre-award interest and legal fees   173.0          
Nationalization of subsidiaries, reimbursement of legal fees and administrative costs   $ 0.2          
Nationalization of subsidiaries, grace period granted from date of award to make payment   6 months          
Nationalization of subsidiaries, post-award interest rate   9.00%          
Nationalization of subsidiaries, period of post-award interest from date of award to payment in default   6 months          
Nationalization of subsidiaries, compensation award post-award interest     $ 144.7        
Nationalization of subsidiaries, compensation award including including principal and post-award interest     317.7        
Matesi Materiales Siderúrgicos S.A [member] | Federal court in District of Columbia [member]              
Disclosure of subsidiaries [line items]              
Nationalization of subsidiaries, compensation award including including principal and post-award interest             $ 256.4
Nationalization of subsidiaries, compensation award post-judgment interest     0.9        
Nationalization of subsidiaries, compensation award including principal, post-award interest and post-judgment interest     257.3        
Tavsa and Comsigua [member] | ICSID in Washington D.C. [member]              
Disclosure of subsidiaries [line items]              
Nationalization of subsidiaries, compensation award not including pre-award interest $ 137.0            
Nationalization of subsidiaries, pre-award interest 76.0            
Nationalization of subsidiaries, reimbursement of legal fees and administrative costs $ 3.3            
Nationalization of subsidiaries, compensation award post-award interest     85.1        
Nationalization of subsidiaries, compensation award including including principal and post-award interest     301.4        
Nationalization of subsidiaries, interest rate basis spread LIBOR            
Nationalization of subsidiaries, basis spread on variable rate 4.00%            
Tavsa and Comsigua [member] | Federal court in District of Columbia [member]              
Disclosure of subsidiaries [line items]              
Nationalization of subsidiaries, compensation award including including principal and post-award interest           $ 276.9  
Nationalization of subsidiaries, compensation award post-judgment interest     0.2        
Nationalization of subsidiaries, compensation award including principal, post-award interest and post-judgment interest     $ 280.9   $ 280.7