v3.26.1
FINANCIAL INSTRUMENTS AND RISK MANAGEMENT - Classification by category of financial instruments (Details) - BRL (R$)
R$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Fair value through other comprehensive income    
AMOUNTS RECEIVABLE - ENBpar    
FINANCIAL ASSETS R$ 1,237,786 R$ 946,059
Fair value through result    
AMOUNTS RECEIVABLE - ENBpar    
FINANCIAL ASSETS 12,930,988 11,537,109
FINANCIAL LIABILITIES 15,064,322 17,500,976
Fair value through result | Loans, financing and debentures    
AMOUNTS RECEIVABLE - ENBpar    
FINANCIAL LIABILITIES 13,261,203 16,323,041
Fair value through result | Derivative financial instruments    
AMOUNTS RECEIVABLE - ENBpar    
FINANCIAL LIABILITIES 1,803,119 1,177,935
Amortized cost    
AMOUNTS RECEIVABLE - ENBpar    
FINANCIAL ASSETS 27,559,236 39,017,827
FINANCIAL LIABILITIES 112,069,908 109,460,695
Amortized cost | Loans, financing and debentures    
AMOUNTS RECEIVABLE - ENBpar    
FINANCIAL LIABILITIES 61,034,561 59,297,533
Amortized cost | Obligations of Law No. 14,182/2021    
AMOUNTS RECEIVABLE - ENBpar    
FINANCIAL LIABILITIES 43,766,663 42,022,123
Amortized cost | Suppliers    
AMOUNTS RECEIVABLE - ENBpar    
FINANCIAL LIABILITIES 3,927,925 2,764,288
Amortized cost | Compulsory loan – Agreements    
AMOUNTS RECEIVABLE - ENBpar    
FINANCIAL LIABILITIES 1,073,452 1,105,534
Amortized cost | RGR Returns    
AMOUNTS RECEIVABLE - ENBpar    
FINANCIAL LIABILITIES 695,705 932,250
Amortized cost | Reimbursement obligations    
AMOUNTS RECEIVABLE - ENBpar    
FINANCIAL LIABILITIES 357,460 70,803
Amortized cost | Shareholders compensation    
AMOUNTS RECEIVABLE - ENBpar    
FINANCIAL LIABILITIES 136,124 2,490,668
Amortized cost | Leases    
AMOUNTS RECEIVABLE - ENBpar    
FINANCIAL LIABILITIES 488,606 182,583
Amortized cost | Concessions payable - use of public property    
AMOUNTS RECEIVABLE - ENBpar    
FINANCIAL LIABILITIES 589,412 594,913
Amortized cost | Cash and cash equivalents    
AMOUNTS RECEIVABLE - ENBpar    
FINANCIAL ASSETS 16,417,860 26,572,522
Amortized cost | Accounts receivable, net    
AMOUNTS RECEIVABLE - ENBpar    
FINANCIAL ASSETS 6,098,448 6,513,888
Amortized cost | Restricted cash    
AMOUNTS RECEIVABLE - ENBpar    
FINANCIAL ASSETS 4,097,063 3,679,483
Amortized cost | Reimbursement rights    
AMOUNTS RECEIVABLE - ENBpar    
FINANCIAL ASSETS 754,672 1,613,335
Amortized cost | Loans, financing and debentures    
AMOUNTS RECEIVABLE - ENBpar    
FINANCIAL ASSETS 191,193 638,599
Level 1 of fair value hierarchy | Investments (Interests) | Fair value through other comprehensive income    
AMOUNTS RECEIVABLE - ENBpar    
FINANCIAL ASSETS 1,175,539 861,234
Level 2 of fair value hierarchy | Derivative financial instruments    
AMOUNTS RECEIVABLE - ENBpar    
FINANCIAL ASSETS 62,247 84,825
Level 2 of fair value hierarchy | Marketable securities | Fair value through result    
AMOUNTS RECEIVABLE - ENBpar    
FINANCIAL ASSETS 11,421,280 8,967,937
Level 2 of fair value hierarchy | Beneficiary Parties | Fair value through result    
AMOUNTS RECEIVABLE - ENBpar    
FINANCIAL ASSETS 435,235 417,242
Level 2 of fair value hierarchy | Derivative financial instruments | Fair value through result    
AMOUNTS RECEIVABLE - ENBpar    
FINANCIAL ASSETS R$ 1,074,473 R$ 2,151,930