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INCOME AND SOCIAL CONTRIBUTION TAXES (Details 2) - BRL (R$)
R$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Deferred tax assets      
Tax loss carryforwards R$ 987 R$ 807 R$ 401
Provisions for contingencies 602 542 538
Impairment on investments 56 244 640
Fair value of derivative financial instruments (PUT SAAG) 229 216 182
Post-employment obligations 1,852 1,981 2,168
Estimated credit losses 319 315 256
Others 665 150 138
Total 4,710 4,255 4,323
Deferred tax liabilities      
Funding cost (9) (5)  
Deemed cost (156) (219) (225)
Fair value of assets acquired in business combination (456) (466) (486)
Borrowing costs capitalized (170) (165) (169)
Taxes on unredeemed income - presumed income (9) (4)
Adjustment to expectation of cash flow - Concession assets (263) (245) (242)
Adjustment of contract assets (940) (895) (768)
Adjustment to fair value: Swap - Loss (210) (412) (1,002)
Updating on escrow deposits (8) (7) (6)
Reimbursement of costs - GSF (274) (319)
Others (27) (15) (12)
Total (2,522) (2,752) (2,910)
Total, net 2,188 1,503 1,413
Total assets 3,120 2,465 2,453
Total liabilities R$ (932) R$ (962) R$ (1,040)