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BUSINESS COMBINATION (Details 10) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
IfrsStatementLineItems [Line Items]      
Property, plant and equipment R$ 26,370,445 R$ 21,531,134 R$ 19,716,223
Carrying amount [member] | C S N Cimentos Brasil S A [Member]      
IfrsStatementLineItems [Line Items]      
Cash and cash equivalents 496,445    
Trade receivables 141,266    
Inventories 272,106    
Recoverable taxes  229,940    
Deferred taxes 982,547    
Other assets  147,565    
 Property, plant and equipment  3,185,975    
Intangíible assets  7,429    
 Total assets acquired  5,463,273    
Trade payables 510,522    
Lease liabilities 43,978    
 Taxes payable  50,527    
Salaries and social charges 32,324    
 Other payables  139,830    
Taxes in installments 148,249    
Legal Contingencies 491,114    
 Total liabilities assumed  1,416,544    
 Net equity acquired  4,046,729    
Property, plant and equipment 3,185,975    
Mining rights 2,456    
Softwares 4,973    
Fair Value Adjustments [Member] | C S N Cimentos Brasil S A [Member]      
IfrsStatementLineItems [Line Items]      
 Property, plant and equipment  402,289    
Intangíible assets  173,586    
 Total assets acquired  575,875    
 Net equity acquired  575,875    
Property, plant and equipment 402,289    
Mining rights 135,216    
Trademarks 38,370    
Total Fair Value [Member] | C S N Cimentos Brasil S A [Member]      
IfrsStatementLineItems [Line Items]      
Cash and cash equivalents 496,445    
Trade receivables 141,266    
Inventories 272,106    
Recoverable taxes  229,940    
Deferred taxes 982,547    
Other assets  147,565    
 Property, plant and equipment  3,588,264    
Intangíible assets  181,015    
 Total assets acquired  6,039,148    
Trade payables 510,522    
Lease liabilities 43,978    
 Taxes payable  50,527    
Salaries and social charges 32,324    
 Other payables  139,830    
Taxes in installments 148,249    
Legal Contingencies 491,114    
 Total liabilities assumed  1,416,544    
 Net equity acquired  4,622,604    
Property, plant and equipment 3,588,264    
Mining rights 137,672    
Trademarks 38,370    
Softwares R$ 4,973    
Business Property Plant And Equipment 1 [Member]      
IfrsStatementLineItems [Line Items]      
Description of basis of valuation of assets available for benefits The values of fixed assets were adjusted by the difference between the revalued value of fixed assets and their respective net book value, according to a technical evaluation carried out by an independent appraiser for the groups of assets represented by improvements constructions, vehicles, furniture and fixtures. The useful lives follow the terms disclosed in note 12.    
Business Property Plant And Equipment 1 [Member] | C S N Cimentos Brasil S A [Member]      
IfrsStatementLineItems [Line Items]      
Description of basis of valuation of assets available for benefits Valued using the "MARKET APPROACH" method, where the fair value of the asset is estimated by comparing it with similar or comparable assets that have been sold or listed for sale in the primary or secondary market.    
Business Mining Rights [Member] | C S N Cimentos Brasil S A [Member]      
IfrsStatementLineItems [Line Items]      
Description of basis of valuation of assets available for benefits Evaluated by the MPEEM method that measures the present value of future income to be generated during the remaining useful life of a given asset. Using the analysis of the company's projected results as a reference, the pre-tax cash flows directly attributable to the asset are calculated, as of the base date stipulated in the evaluation.    
Business Trademarks [Member] | C S N Cimentos Brasil S A [Member]      
IfrsStatementLineItems [Line Items]      
Description of basis of valuation of assets available for benefits The brands were evaluated using the Royalty Relief method, which consists in projecting expected royalty payments and measuring them at present value.    
Business Softwares [Member] | C S N Cimentos Brasil S A [Member]      
IfrsStatementLineItems [Line Items]      
Description of basis of valuation of assets available for benefits The Company's software has not been evaluated.    
Carrying Amount One [Member] | C S N Cimentos Brasil S A [Member]      
IfrsStatementLineItems [Line Items]      
Property, plant and equipment R$ 3,193,404    
Fair Value Adjustments One [Member] | C S N Cimentos Brasil S A [Member]      
IfrsStatementLineItems [Line Items]      
Property, plant and equipment 575,875    
Total Fair Value One [Member] | C S N Cimentos Brasil S A [Member]      
IfrsStatementLineItems [Line Items]      
Property, plant and equipment R$ 3,769,279