v3.25.4
FINANCIAL INSTRUMENTS AND RISK AND CAPITAL MANAGEMENT (Details 6) - Separate - BRL (R$)
R$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets Book value R$ 18,591,758 R$ 16,963,539
Financial assets Fair value 18,591,758 16,963,539
Noncurrent financial liabilities Book value 30,619,757 31,327,431
Fair value of financial liabilities 30,619,757 31,327,431
Trade accounts payable | Amortized cost    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Current financial liabilities Book value 9,861,294 9,230,624
Current financial liabilities Fair value 9,861,294 9,230,624
Loans and financing borrowings | Amortized cost    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Current financial liabilities Book value 2,200 232,118
Current financial liabilities Fair value 2,200 232,118
Loans and financing borrowings | Financial liabilities at fair value through profit or loss, category    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Noncurrent financial liabilities Book value 1,474 1,572,592
Noncurrent financial liabilities Fair value 1,474 1,572,592
Leases | Financial liabilities at fair value through profit or loss, category    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Current financial liabilities Book value 4,883,176 4,520,626
Noncurrent financial liabilities Book value 10,549,678 10,725,980
Current financial liabilities Fair value 4,883,176 4,520,626
Noncurrent financial liabilities Fair value 10,549,678 10,725,980
Debentures | Amortized cost    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Current financial liabilities Book value 161,453 1,695,214
Current financial liabilities Fair value 161,453 1,695,214
Debentures | Financial liabilities at fair value through profit or loss, category    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Noncurrent financial liabilities Book value 2,905,512 2,000,000
Noncurrent financial liabilities Fair value 2,905,512 2,000,000
Derivatives | Level 2 of fair value hierarchy    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Current financial liabilities Book value 47,595  
Current financial liabilities Fair value 47,595  
Derivatives | Financial liabilities at fair value through profit or loss, category | Level 2 of fair value hierarchy    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Current financial liabilities Book value 5,449 866
Current financial liabilities Fair value 5,449 866
Derivatives | Measured at fair value through OCI | Level 2 of fair value hierarchy    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Noncurrent financial liabilities Book value 43,859 10,403
Noncurrent financial liabilities Fair value 43,859 10,403
Liabilities with ANATEL | Amortized cost    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Current financial liabilities Book value 83,558 146,844
Current financial liabilities Fair value 83,558 146,844
Liabilities with ANATEL | Financial liabilities at fair value through profit or loss, category    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Noncurrent financial liabilities Book value 911,899 892,648
Noncurrent financial liabilities Fair value 911,899 892,648
Reduction of Capital of the Company | Amortized cost    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Current financial liabilities Book value 91,093 38,721
Current financial liabilities Fair value 91,093 38,721
Reverse stock split and stock split | Amortized cost    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Current financial liabilities Book value 824,723  
Current financial liabilities Fair value 824,723  
Amounts to be refunded to customers | Amortized cost    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Current financial liabilities Book value 108,166 126,867
Current financial liabilities Fair value 108,166 126,867
Liabilities with related parties | Amortized cost    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Current financial liabilities Book value 138,026 133,290
Current financial liabilities Fair value 138,026 133,290
Liabilities with related parties | Financial liabilities at fair value through profit or loss, category    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Noncurrent financial liabilities Book value 602 638
Noncurrent financial liabilities Fair value 602 638
Cash and cash equivalents | Amortized cost    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Current financial assets Book value 7,032,339 6,691,098
Current financial assets Fair value 7,032,339 6,691,098
Financial investments | Amortized cost    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Noncurrent financial assets Book value 41,308 42,619
Noncurrent financial assets Fair value 41,308 42,619
Financial investments | Amortized cost | Level 2 of fair value hierarchy    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Current financial assets Book value 99,102  
Current financial assets Fair value 99,102  
Trade accounts receivable | Amortized cost    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Noncurrent financial assets Book value 283,502 370,149
Noncurrent financial assets Fair value 283,502 370,149
Trade accounts receivable | Amortized cost    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Current financial assets Book value 10,619,617 9,471,592
Current financial assets Fair value 10,619,617 9,471,592
Derivatives | Financial assets at fair value through other comprehensive income, category | Level 2 of fair value hierarchy    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Noncurrent financial assets Book value 8,622 1,840
Noncurrent financial assets Fair value 8,622 1,840
Derivatives | Financial liabilities at fair value through profit or loss, category | Level 2 of fair value hierarchy    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Current financial assets Book value 7,706 15,524
Current financial assets Fair value 7,706 15,524
Sale of real estate and other receivables | Financial assets at fair value through other comprehensive income, category    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Current financial assets Book value 192,472 134,963
Noncurrent financial assets Book value 280,619 120,354
Current financial assets Fair value 192,472 134,963
Noncurrent financial assets Fair value 280,619 120,354
Related-party receivables | Financial assets at fair value through other comprehensive income, category    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Current financial assets Book value 26,317 72,641
Noncurrent financial assets Book value 154 42,759
Current financial assets Fair value 26,317 72,641
Noncurrent financial assets Fair value R$ 154 R$ 42,759