ACQUISITION OF BUSINESS – INCREASE OF THE PARTICIPATION IN USIMINAS CONTROL GROUP AND NEW GOVERNANCE STRUCTURE OF USIMINAS -Provisions For Contingencies (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Jul. 03, 2023	Jul. 02, 2023
Contingencies Recognized By Usiminas Before Business Combination
Disclosure of detailed information about business combination [line items]
Total Provision for contingencies	$ (100,150)	$ (199,677)
Tax Contingencies Recognized As Part Of The Business Combination
Disclosure of detailed information about business combination [line items]
Total Provision for contingencies	(327,261)	(432,488)
Civil And Other Contingencies Recognized As Part Of The Business Combination
Disclosure of detailed information about business combination [line items]
Total Provision for contingencies	(57,851)	(174,333)
Labour Contingencies Recognized As Part Of The Business Combination
Disclosure of detailed information about business combination [line items]
Total Provision for contingencies	$ (24,181)	(49,655)
Usiminas
Disclosure of detailed information about business combination [line items]
Total Provision for contingencies		(856,153)
Usiminas \| Contingencies Recognized By Usiminas Before Business Combination
Disclosure of detailed information about business combination [line items]
Total Provision for contingencies			$ (199,677)
Usiminas \| Tax Contingencies Recognized As Part Of The Business Combination
Disclosure of detailed information about business combination [line items]
Total Provision for contingencies		(432,488)
Usiminas \| Civil And Other Contingencies Recognized As Part Of The Business Combination
Disclosure of detailed information about business combination [line items]
Total Provision for contingencies		(174,333)
Usiminas \| Labour Contingencies Recognized As Part Of The Business Combination
Disclosure of detailed information about business combination [line items]
Total Provision for contingencies		$ (49,655)