v3.25.4
CONSOLIDATED FINANCIAL STATEMENTS - Acquisition of joint venture, associate company and subsidiaries Rio do Sangue Energia S.A. and Comercial Gerdau (Details) - BRL (R$)
R$ in Thousands
12 Months Ended
Apr. 11, 2025
Dec. 31, 2025
Mar. 21, 2025
Business Combinations      
Gain from a bargain purchase   R$ 41,306  
Rio do Sangue Energia S.A.      
Business Combinations      
Current assets     R$ 1,205
Property, plant and equipament, net     32,112
Other intangibles     212,158
Other non-current assets     400
Current liabilities     (1,244)
Non-current liabilities     (83)
Assets (Liabilities), net     244,548
Purchase price     244,548
Rio do Sangue Energia S.A. | Book Value      
Business Combinations      
Current assets     1,205
Property, plant and equipament, net     32,112
Other intangibles     1,949
Other non-current assets     400
Current liabilities     (1,244)
Non-current liabilities     (83)
Assets (Liabilities), net     34,339
Rio do Sangue Energia S.A. | Acquisition's adjustments      
Business Combinations      
Other intangibles     210,209
Assets (Liabilities), net     R$ 210,209
Comercial Gerdau Aos Planos Ltda      
Business Combinations      
Purchase price R$ 42,900    
Percentage of equity interest acquired (as a percent) 100.00%    
Gain from a bargain purchase R$ 3,600