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Schedule of capital monitored by index (Details) - BRL (R$)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
IfrsStatementLineItems [Line Items]      
Less: Cash and cash equivalents R$ 3,472,845,000 R$ 3,222,768  
Net income 5,048,602,000 3,909,750,000 R$ 2,062,869,000
Deferred IRPJ and CSLL 790,406,000 24,896,000 258,974,000
Provision for IRPJ and CSLL 469,226,000 1,260,469,000 416,687,000
Depreciation and amortization 1,082,539,000 1,009,912,000 R$ 950,726,000
Capital Management [Member]      
IfrsStatementLineItems [Line Items]      
Loans and financing 3,678,444,000 3,188,531,000  
Debentures 8,147,617,000 6,757,481,000  
Less: Cash and cash equivalents (3,472,845,000) (3,222,768,000)  
Less: Bonds and securities (current) (16,121,000) (1,465,000)  
Less: Bonds and securities (noncurrent) - debt contract guarantees (237,183,000) (175,901,000)  
Less: Collaterals and escrow accounts STN (142,764,000) (133,521,000)  
Adjusted net debt 7,957,148,000 6,412,357,000  
Net income 3,859,045,000 3,834,172,000  
Equity in earnings of investees (366,314,000) (193,547,000)  
Deferred IRPJ and CSLL 790,406,000 24,896,000  
Provision for IRPJ and CSLL 469,226,000 1,260,469,000  
Financial expenses (income), net 327,361,000 (866,271,000)  
Depreciation and amortization 1,082,539,000 1,009,913,000  
Ebitda from discontinued operations 1,872,381,000 259,560,000  
Adjusted ebitda R$ 8,034,644,000 R$ 5,329,192,000  
Adjusted net debt / Ebitda (in R$ per share) R$ 0.99 R$ 1.20