v3.26.1
OTHER LIABILITIES - NON CURRENT AND CURRENT (Schedule of Fair Value of Plan Assets) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of net defined benefit liability (asset) [line items]    
Net defined benefit asset $ (573,834)  
Expected return on assets (21,905) $ 177,519
Net defined benefit asset (703,788) (573,834)
Non-US government securities 861,452 716,909
Fixed income 94,747 81,821
Investments funds 215,233 202,987
Others 2,701 1,334
At the end of the year 1,211,079 1,032,356
Usiminas    
Disclosure of net defined benefit liability (asset) [line items]    
Usiminas shares 36,946 29,305
Fair value of plan assets    
Disclosure of net defined benefit liability (asset) [line items]    
Net defined benefit asset 1,032,356 1,525,330
Expected return on assets 21,905 (177,519)
Interest income 133,724 109,350
Translation differences 128,992 (330,283)
Contributions paid 16,936 13,111
Funding of the plan (122,834) (107,633)
Net defined benefit asset $ 1,211,079 $ 1,032,356