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Borrowings and financing (Details 4) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
IfrsStatementLineItems [Line Items] |  |  |
Borrowings and financing, beginning | R$ 19,536,350 | R$ 18,958,671 | R$ 17,723,836
Addition (lease) | 84,048 | 108,405 | 42,182
Funding | 6,902,565 | 2,396,058 | 2,834,551
Borrowing costs | (31,811) | (24,947) | (27,525)
Monetary variation and exchange rate changes | 659,475 | (163,322) | (301,716)
Fair Value | 34,388 |  |
Inflation adjustment / exchange variation and incorporated interest - Capitalized | 31,979 | 29,465 | 13,554
Exchange rate change reclassified to OCI | 48,728 |  |
Interest paid | (1,976,694) | (1,936,419) | (1,505,488)
Amortization | (2,246,263) | (1,771,090) | (1,536,724)
Accrued interest | 1,655,765 | 1,314,359 | 1,091,592
Provision for interest and fees - Capitalized | 532,323 | 608,743 | 609,249
Provision for interest/rates reclassifiedto OCI | 6,674 |  |
Expenses with borrowing costs | 20,770 | 16,427 | 15,160
Borrowings and financing, ending | 25,258,297 | 19,536,350 | 18,958,671
Local Currency [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Borrowings and financing, beginning | 16,790,459 | 16,182,913 | 14,427,683
Addition (lease) | 84,048 | 108,405 | 42,182
Funding | 6,668,823 | 1,837,687 | 2,553,091
Borrowing costs | (24,966) | (16,778) | (17,627)
Monetary variation and exchange rate changes | 134,253 | 146,637 | 190,202
Fair Value |  |  |
Inflation adjustment / exchange variation and incorporated interest - Capitalized | 30,976 | 29,360 | 10,250
Exchange rate change reclassified to OCI |  |  |
Interest paid | (1,857,369) | (1,852,280) | (1,454,009)
Amortization | (2,009,720) | (1,492,795) | (1,232,434)
Accrued interest | 1,535,494 | 1,225,161 | 1,044,453
Provision for interest and fees - Capitalized | 531,225 | 607,612 | 605,513
Provision for interest/rates reclassifiedto OCI |  |  |
Expenses with borrowing costs | 18,709 | 14,537 | 13,609
Borrowings and financing, ending | 21,901,932 | 16,790,459 | 16,182,913
Local Currency [Member] | Debentures [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Borrowings and financing, beginning | 7,534,818 | 8,166,366 | 7,467,968
Addition (lease) |  |  |
Funding | 5,440,478 |  | 1,000,000
Borrowing costs | (13,010) | (2,043) | (4,320)
Monetary variation and exchange rate changes | 116,330 | 114,228 | 165,879
Fair Value |  |  |
Inflation adjustment / exchange variation and incorporated interest - Capitalized | 25,579 | 21,421 |
Exchange rate change reclassified to OCI |  |  |
Interest paid | (795,005) | (839,833) | (712,966)
Amortization | (1,232,091) | (741,812) | (563,504)
Accrued interest | 801,565 | 628,580 | 544,116
Provision for interest and fees - Capitalized | 169,235 | 176,739 | 257,951
Provision for interest/rates reclassifiedto OCI |  |  |
Expenses with borrowing costs | 14,124 | 11,172 | 11,242
Borrowings and financing, ending | 12,062,023 | 7,534,818 | 8,166,366
Local Currency [Member] | Brazilian Federal Savings Banks [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Borrowings and financing, beginning | 1,621,014 | 1,526,185 | 1,483,113
Addition (lease) |  |  |
Funding | 165,873 | 174,058 | 119,437
Borrowing costs |  |  |
Monetary variation and exchange rate changes | 10,503 | 22,023 | 17,247
Fair Value |  |  |
Inflation adjustment / exchange variation and incorporated interest - Capitalized | 2,879 | 5,475 | 7,131
Exchange rate change reclassified to OCI |  |  |
Interest paid | (128,418) | (122,843) | (117,041)
Amortization | (112,399) | (106,982) | (100,855)
Accrued interest | 101,284 | 98,428 | 80,422
Provision for interest and fees - Capitalized | 27,321 | 24,670 | 36,731
Provision for interest/rates reclassifiedto OCI |  |  |
Expenses with borrowing costs |  |  |
Borrowings and financing, ending | 1,688,057 | 1,621,014 | 1,526,185
Local Currency [Member] | BNDES [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Borrowings and financing, beginning | 1,341,472 | 1,380,993 | 1,392,844
Addition (lease) |  |  |
Funding |  | 190,000 | 200,000
Borrowing costs |  |  |
Monetary variation and exchange rate changes | 7,413 | 10,326 | 7,020
Fair Value |  |  |
Inflation adjustment / exchange variation and incorporated interest - Capitalized | 2,518 | 2,464 | 3,117
Exchange rate change reclassified to OCI |  |  |
Interest paid | (93,215) | (97,829) | (104,596)
Amortization | (281,867) | (241,992) | (222,353)
Accrued interest | 67,629 | 78,745 | 67,311
Provision for interest and fees - Capitalized | 24,887 | 18,516 | 37,391
Provision for interest/rates reclassifiedto OCI |  |  |
Expenses with borrowing costs | 238 | 249 | 259
Borrowings and financing, ending | 1,069,075 | 1,341,472 | 1,380,993
Local Currency [Member] | BID 2202 [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Borrowings and financing, beginning | 2,252,742 |  |
Addition (lease) |  |  |
Funding |  |  |
Borrowing costs |  |  |
Monetary variation and exchange rate changes |  |  |
Fair Value |  |  |
Inflation adjustment / exchange variation and incorporated interest - Capitalized |  |  |
Exchange rate change reclassified to OCI |  |  |
Interest paid | (257,571) |  |
Amortization | (181,349) |  |
Accrued interest | 139,993 |  |
Provision for interest and fees - Capitalized | 104,513 |  |
Provision for interest/rates reclassifiedto OCI |  |  |
Expenses with borrowing costs | 955 |  |
Borrowings and financing, ending | 2,059,283 | 2,252,742 |
Local Currency [Member] | BID INVEST 2020 [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Borrowings and financing, beginning | 900,367 |  |
Addition (lease) |  |  |
Funding |  |  |
Borrowing costs |  |  |
Monetary variation and exchange rate changes |  |  |
Fair Value |  |  |
Exchange rate change reclassified to OCI |  |  |
Interest paid | (115,506) |  |
Amortization | (39,550) |  |
Accrued interest | 15,854 |  |
Provision for interest and fees - Capitalized | 93,554 |  |
Provision for interest/rates reclassifiedto OCI |  |  |
Expenses with borrowing costs | 661 |  |
Borrowings and financing, ending | 855,380 | 900,367 |
Local Currency [Member] | IFC 2022 [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Borrowings and financing, beginning | 757,297 | 774,525 |
Addition (lease) |  |  |
Funding |  |  |
Borrowing costs |  |  |
Monetary variation and exchange rate changes |  |  |
Fair Value |  |  |
Inflation adjustment / exchange variation and incorporated interest - Capitalized |  |  |
Exchange rate change reclassified to OCI |  |  |
Interest paid | (94,577) | (114,131) |
Amortization | (22,800) | (15,200) |
Accrued interest | 46,651 | 15,029 |
Provision for interest and fees - Capitalized | 46,372 | 96,160 |
Provision for interest/rates reclassifiedto OCI |  |  |
Expenses with borrowing costs | 915 | 914 |
Borrowings and financing, ending | 733,858 | 757,297 | 774,525
Local Currency [Member] | IFC 2023 [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Borrowings and financing, beginning | 1,006,642 |  |
Addition (lease) |  |  |
Funding |  | 1,000,000 |
Borrowing costs | (528) | (13,652) |
Monetary variation and exchange rate changes |  |  |
Fair Value |  |  |
Inflation adjustment / exchange variation and incorporated interest - Capitalized |  |  |
Exchange rate change reclassified to OCI |  |  |
Interest paid | (116,964) | (2,434) |
Amortization |  |  |
Accrued interest | 61,841 | 11,335 |
Provision for interest and fees - Capitalized | 60,871 | 11,090 |
Provision for interest/rates reclassifiedto OCI |  |  |
Expenses with borrowing costs | 1,451 | 303 |
Borrowings and financing, ending | 1,013,313 | 1,006,642 |
Local Currency [Member] | IFC 2024 [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Borrowings and financing, beginning |  |  |
Addition (lease) |  |  |
Funding | 1,060,000 |  |
Borrowing costs | (11,428) |  |
Monetary variation and exchange rate changes |  |  |
Fair Value |  |  |
Inflation adjustment / exchange variation and incorporated interest - Capitalized |  |  |
Exchange rate change reclassified to OCI |  |  |
Interest paid |  |  |
Amortization |  |  |
Accrued interest | 5,698 |  |
Provision for interest and fees - Capitalized | 4,470 |  |
Provision for interest/rates reclassifiedto OCI |  |  |
Expenses with borrowing costs | 7 |  |
Borrowings and financing, ending | 1,058,747 |  |
Local Currency [Member] | IDB INVEST 2022 [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Borrowings and financing, beginning | 454,543 | 469,327 |
Addition (lease) |  |  |
Funding |  |  | 470,000
Borrowing costs |  |  | (3,922)
Monetary variation and exchange rate changes |  |  |
Fair Value |  |  |
Inflation adjustment / exchange variation and incorporated interest - Capitalized |  |  |
Exchange rate change reclassified to OCI |  |  |
Interest paid | (59,504) | (72,245) | (30,698)
Amortization | (14,100) | (14,100) |
Accrued interest | 59,752 | 71,305 | 33,840
Provision for interest and fees - Capitalized |  |  |
Provision for interest/rates reclassifiedto OCI |  |  |
Expenses with borrowing costs | 256 | 256 | 107
Borrowings and financing, ending | 440,947 | 454,543 | 469,327
Local Currency [Member] | IDB INVEST 2023 [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Borrowings and financing, beginning | 464,131 |  |
Addition (lease) |  |  |
Funding |  | 470,000 |
Borrowing costs |  | (1,083) |
Monetary variation and exchange rate changes |  |  |
Fair Value |  |  |
Inflation adjustment / exchange variation and incorporated interest - Capitalized |  |  |
Exchange rate change reclassified to OCI |  |  |
Interest paid | (59,907) | (41,022) |
Amortization | (14,100) | (7,050) |
Accrued interest | 60,191 | 43,263 |
Provision for interest and fees - Capitalized |  |  |
Provision for interest/rates reclassifiedto OCI |  |  |
Expenses with borrowing costs | 70 | 23 |
Borrowings and financing, ending | 450,385 | 464,131 |
Local Currency [Member] | Leases (Concession Agreements, Program Contracts and Contract Assets) [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Borrowings and financing, beginning | 309,210 | 357,844 | 397,311
Addition (lease) |  |  |
Funding |  |  |
Borrowing costs |  |  |
Monetary variation and exchange rate changes |  |  |
Fair Value |  |  |
Inflation adjustment / exchange variation and incorporated interest - Capitalized |  |  |
Exchange rate change reclassified to OCI |  |  |
Interest paid | (104,725) | (54,135) | (54,390)
Amortization |  | (48,634) | (39,467)
Accrued interest | 112,659 | 54,135 | 54,390
Provision for interest and fees - Capitalized |  |  |
Provision for interest/rates reclassifiedto OCI |  |  |
Expenses with borrowing costs |  |  |
Borrowings and financing, ending | 317,144 | 309,210 | 357,844
Local Currency [Member] | Leases (Others) [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Borrowings and financing, beginning | 142,300 | 101,374 | 125,969
Addition (lease) | 84,048 | 108,405 | 42,182
Funding |  |  |
Borrowing costs |  |  |
Monetary variation and exchange rate changes |  |  |
Fair Value |  |  |
Inflation adjustment / exchange variation and incorporated interest - Capitalized |  |  |
Exchange rate change reclassified to OCI |  |  |
Interest paid | (31,799) | (39,918) | (17,659)
Amortization | (105,839) | (88,452) | (84,437)
Accrued interest | 62,214 | 60,891 | 35,319
Provision for interest and fees - Capitalized |  |  |
Provision for interest/rates reclassifiedto OCI |  |  |
Expenses with borrowing costs |  |  |
Borrowings and financing, ending | 150,924 | 142,300 | 101,374
Local Currency [Member] | Other Borrowings [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Borrowings and financing, beginning | 5,923 | 12,130 | 14,094
Addition (lease) |  |  |
Funding | 2,472 | 3,629 | 3,654
Borrowing costs |  |  |
Monetary variation and exchange rate changes | 7 | 60 | 56
Inflation adjustment / exchange variation and incorporated interest - Capitalized |  |  | 2
Exchange rate change reclassified to OCI |  |  |
Interest paid | (178) | (587) | (789)
Amortization | (5,625) | (9,884) | (5,669)
Accrued interest | 163 | 566 | 748
Provision for interest and fees - Capitalized | 2 | 9 | 34
Provision for interest/rates reclassifiedto OCI |  |  |
Expenses with borrowing costs | 32 |  |
Borrowings and financing, ending | 2,796 | 5,923 | 12,130
Local Currency [Member] | IDB 2202 [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Borrowings and financing, beginning | 2,252,742 | 2,450,550 | 2,589,442
Addition (lease) |  |  |
Funding |  |  |
Borrowing costs |  |  |
Monetary variation and exchange rate changes |  |  |
Inflation adjustment / exchange variation and incorporated interest - Capitalized |  |  |
Interest paid |  | (328,627) | (281,971)
Amortization |  | (181,349) | (181,349)
Accrued interest |  | 135,524 | 98,574
Provision for interest and fees - Capitalized |  | 175,689 | 224,899
Expenses with borrowing costs |  | 955 | 955
Borrowings and financing, ending |  | 2,252,742 | 2,450,550
Local Currency [Member] | IDB INVEST [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Borrowings and financing, beginning | 900,367 | 943,619 | 956,942
Addition (lease) |  |  |
Funding |  |  |
Borrowing costs |  |  |
Monetary variation and exchange rate changes |  |  |
Inflation adjustment / exchange variation and incorporated interest - Capitalized |  |  |
Interest paid |  | (138,676) | (108,921)
Amortization |  | (37,340) | (34,800)
Accrued interest |  | 27,360 | 129,733
Provision for interest and fees - Capitalized |  | 104,739 |
Expenses with borrowing costs |  | 665 | 665
Borrowings and financing, ending |  | 900,367 | 943,619
Local Currency [Member] | IFC [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Borrowings and financing, beginning |  | 774,525 |
Addition (lease) |  |  |
Funding |  |  | 760,000
Borrowing costs |  |  | (9,385)
Monetary variation and exchange rate changes |  |  |
Inflation adjustment / exchange variation and incorporated interest - Capitalized |  |  |
Interest paid |  |  | (24,978)
Amortization |  |  |
Accrued interest |  |  |
Provision for interest and fees - Capitalized |  |  | 48,507
Expenses with borrowing costs |  |  | 381
Borrowings and financing, ending |  |  | 774,525
Foreign Currency [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Borrowings and financing, beginning | 2,745,891 | 2,775,758 | 3,296,153
Addition (lease) |  |  |
Funding | 233,742 | 558,371 | 281,460
Borrowing costs | (6,845) | (8,169) | (9,898)
Monetary variation and exchange rate changes | 525,222 | (309,959) | (491,918)
Fair Value | 34,388 |  |
Inflation adjustment / exchange variation and incorporated interest - Capitalized | 1,003 | 105 | 3,304
Exchange rate change reclassified to OCI | 48,728 |  |
Interest paid | (119,325) | (84,139) | (51,479)
Amortization | (236,543) | (278,295) | (304,290)
Accrued interest | 120,271 | 89,198 | 47,139
Provision for interest and fees - Capitalized | 1,098 | 1,131 | 3,736
Provision for interest/rates reclassifiedto OCI | 6,674 |  |
Expenses with borrowing costs | 2,061 | 1,890 | 1,551
Borrowings and financing, ending | 3,356,365 | 2,745,891 | 2,775,758
Foreign Currency [Member] | IDBs [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Borrowings and financing, beginning | 819,455 | 532,693 | 387,837
Addition (lease) |  |  |
Funding | 29,428 | 384,824 | 226,497
Borrowing costs | (4,096) | (5,137) | (6,732)
Monetary variation and exchange rate changes | 196,490 | (45,895) | (20,355)
Fair Value |  |  |
Inflation adjustment / exchange variation and incorporated interest - Capitalized |  |  |
Exchange rate change reclassified to OCI | 26,808 |  |
Interest paid | (58,916) | (33,808) | (12,581)
Amortization | (53,446) | (51,178) | (56,273)
Accrued interest | 57,242 | 36,929 | 13,733
Provision for interest and fees - Capitalized |  |  |
Provision for interest/rates reclassifiedto OCI | 3,609 |  |
Expenses with borrowing costs | 1,259 | 1,027 | 567
Borrowings and financing, ending | 1,017,833 | 819,455 | 532,693
Foreign Currency [Member] | IBRD [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Borrowings and financing, beginning | 515,015 | 399,762 | 420,881
Addition (lease) |  |  |
Funding | 204,314 | 173,547 | 39,417
Borrowing costs | (2,749) | (3,032) | (3,166)
Monetary variation and exchange rate changes | 132,645 | (30,374) | (28,665)
Fair Value |  |  |
Inflation adjustment / exchange variation and incorporated interest - Capitalized | 9 |  | 61
Exchange rate change reclassified to OCI | 21,920 |  |
Interest paid | (37,492) | (22,089) | (3,779)
Amortization | (32,319) | (31,009) | (30,895)
Accrued interest | 40,715 | 27,663 | 5,525
Provision for interest and fees - Capitalized | 298 | 57 | 20
Provision for interest/rates reclassifiedto OCI | 3,065 |  |
Expenses with borrowing costs | 596 | 490 | 363
Borrowings and financing, ending | 846,017 | 515,015 | 399,762
Foreign Currency [Member] | JICA [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Borrowings and financing, beginning | 1,411,421 | 1,803,109 | 2,401,887
Addition (lease) |  |  |
Funding |  |  | 15,546
Borrowing costs |  |  |
Monetary variation and exchange rate changes | 196,087 | (231,877) | (437,296)
Fair Value | 34,388 |  |
Inflation adjustment / exchange variation and incorporated interest - Capitalized | 994 | 105 | 3,243
Exchange rate change reclassified to OCI |  |  |
Interest paid | (22,917) | (26,795) | (33,167)
Amortization | (150,778) | (157,785) | (177,007)
Accrued interest | 22,314 | 23,697 | 26,597
Provision for interest and fees - Capitalized | 800 | 763 | 3,102
Provision for interest/rates reclassifiedto OCI |  |  |
Expenses with borrowing costs | 206 | 204 | 204
Borrowings and financing, ending | 1,492,515 | 1,411,421 | 1,803,109
Foreign Currency [Member] | IDB 1983AB [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Borrowings and financing, beginning |  | 40,194 |
Funding |  |  |
Borrowing costs |  |  |
Monetary variation and exchange rate changes |  | (1,813) |
Inflation adjustment / exchange variation and incorporated interest - Capitalized |  |  |
Interest paid |  | (1,447) |
Amortization |  | (38,323) |
Accrued interest |  | 909 |
Provision for interest and fees - Capitalized |  | 311 |
Expenses with borrowing costs |  | 169 |
Borrowings and financing, ending |  |  | 40,194
Foreign Currency [Member] | BID 1983AB [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Borrowings and financing, beginning |  | R$ 40,194 | 85,548
Addition (lease) |  |  |
Funding |  |  |
Borrowing costs |  |  |
Monetary variation and exchange rate changes |  |  | (5,602)
Inflation adjustment / exchange variation and incorporated interest - Capitalized |  |  |
Interest paid |  |  | (1,952)
Amortization |  |  | (40,115)
Accrued interest |  |  | 1,284
Provision for interest and fees - Capitalized |  |  | 614
Expenses with borrowing costs |  |  | 417
Borrowings and financing, ending |  |  | R$ 40,194

X
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