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OTHER OPERATING INCOME (EXPENSES), NET (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of attribution of expenses by nature to their function [line items]      
Results of sundry assets $ 8,867 $ 8,165 $ 8,177
Gain from the agreement related to the post-retirement benefits from Usiminas 0 108,696 0
Provision for legal claims and other matters 60,469 59,649 1,069
Other operating income 0 0 5,735
Other operating income 69,336 176,510 14,981
Other operating expense (11,667) (23,857) 0
Other operating expense (44,102) (66,173) (99,000)
Other operating (expense) income, net 25,234 110,337 (84,019)
Update of certain tax liabilities   10  
Mining assets      
Disclosure of attribution of expenses by nature to their function [line items]      
Impairment charge $ (32,435) $ (42,316)  
Buildings and improvements      
Disclosure of attribution of expenses by nature to their function [line items]      
Impairment charge     $ (99,000)