PROVISIONS AND CONTINGENCIES - Breakdown of changes in provisions (Details) - BRL (R$)
R$ in Thousands |
12 Months Ended |
|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
| Disclosure of other provisions [line items] |
|
|
|
| Other provisions |
R$ 7,231,359
|
R$ 7,139,785
|
R$ 7,982,637
|
| Additions (reversal), net |
618,576
|
306,055
|
|
| Additional provisions inflows except income, other provisions |
(237,435)
|
(464,921)
|
|
| Write-offs due to payment |
(988,197)
|
(861,325)
|
|
| Interest accruals |
726,315
|
81,705
|
|
| Provisions and contingencies |
1,607,456
|
1,770,997
|
|
| Provisions and contingencies |
5,623,903
|
5,368,788
|
|
| Business combination – IPNET |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
(62,918)
|
(95,634)
|
|
| Business combination – Samauma |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
(7,819)
|
|
|
| Business combination – FiBrasil |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
(25,593)
|
|
|
| Business combination – Cyber |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
(1,821)
|
|
|
| Tax(1) |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Other provisions |
2,105,071
|
2,022,987
|
2,753,323
|
| Additions (reversal), net |
106,581
|
40,063
|
|
| Additional provisions inflows except income, other provisions |
(75,119)
|
(489,082)
|
|
| Write-offs due to payment |
(62,457)
|
(70,922)
|
|
| Interest accruals |
144,755
|
(265,396)
|
|
| Provisions and contingencies |
89,274
|
160,947
|
|
| Provisions and contingencies |
2,015,797
|
1,862,040
|
|
| Write-offs due to the Company's adherence to tax amnesty programs |
|
885,471
|
|
| Gains from the reversal of operating expenses of provision for contingencies |
25,638
|
26,546
|
|
| Gains from the reversal of financial expenses of monetary update of provisions for contingencies |
65,990
|
374,271
|
|
| Assumption of debt |
75,119
|
484,654
|
|
| Tax(1) | Business combination – IPNET |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
(38,123)
|
(55,001)
|
|
| Tax(1) | Business combination – Samauma |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
(4,784)
|
|
|
| Tax(1) | Business combination – FiBrasil |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
0
|
|
|
| Tax(1) | Business combination – Cyber |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
(1,663)
|
|
|
| Regulatory |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Provisions |
1,073,962
|
1,151,095
|
|
| Other provisions |
1,073,962
|
1,151,095
|
1,760,866
|
| Additions (reversal), net |
16,042
|
(377,510)
|
|
| Additional provisions inflows except income, other provisions |
(172,320)
|
0
|
|
| Write-offs due to payment |
(10,162)
|
(16,299)
|
|
| Interest accruals |
89,307
|
(215,962)
|
|
| Provisions and contingencies |
55,651
|
195,063
|
|
| Provisions and contingencies |
1,018,311
|
956,032
|
|
| Possible losses provisions |
3,237,934
|
3,066,637
|
|
| Gains from the reversal of operating expenses of provision for contingencies |
386,392
|
|
|
| Gains from the reversal of financial expenses of monetary update of provisions for contingencies |
|
405,986
|
|
| Write-off due to the Commitment Agreement Associated with the Self-Composition Negotiations |
792,378
|
|
|
| Regulatory | Business combination – IPNET |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
0
|
0
|
|
| Regulatory | Business combination – Samauma |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
0
|
|
|
| Regulatory | Business combination – FiBrasil |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
0
|
|
|
| Regulatory | Business combination – Cyber |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
0
|
|
|
| Civil |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Provisions |
1,434,665
|
1,411,141
|
|
| Other provisions |
1,434,665
|
1,411,141
|
1,226,995
|
| Additions (reversal), net |
257,986
|
251,429
|
|
| Additional provisions inflows except income, other provisions |
0
|
0
|
|
| Write-offs due to payment |
(392,614)
|
(340,327)
|
|
| Interest accruals |
158,152
|
273,044
|
|
| Provisions and contingencies |
749,193
|
573,679
|
|
| Provisions and contingencies |
685,472
|
837,462
|
|
| Possible losses provisions |
1,815,801
|
2,000,926
|
|
| Civil | Business combination – IPNET |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
0
|
0
|
|
| Civil | Business combination – Samauma |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
0
|
|
|
| Civil | Business combination – FiBrasil |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
0
|
|
|
| Civil | Business combination – Cyber |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
0
|
|
|
| Labor |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Provisions |
978,552
|
935,541
|
|
| Other provisions |
978,552
|
935,541
|
693,712
|
| Additions (reversal), net |
377,994
|
420,471
|
|
| Additional provisions inflows except income, other provisions |
2
|
0
|
|
| Write-offs due to payment |
(519,069)
|
(423,720)
|
|
| Interest accruals |
206,620
|
213,409
|
|
| Provisions and contingencies |
662,626
|
701,300
|
|
| Provisions and contingencies |
315,926
|
234,241
|
|
| Possible losses provisions |
1,151,825
|
1,346,257
|
|
| Labor | Business combination – IPNET |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
(24,795)
|
(31,669)
|
|
| Labor | Business combination – Samauma |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
(573)
|
|
|
| Labor | Business combination – FiBrasil |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
(1,528)
|
|
|
| Labor | Business combination – Cyber |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
(158)
|
|
|
| Contingent liabilities (PPA) |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Other provisions |
1,186,635
|
1,075,139
|
1,002,901
|
| Additions (reversal), net |
(26,740)
|
(12,517)
|
|
| Additional provisions inflows except income, other provisions |
0
|
(410)
|
|
| Write-offs due to payment |
(1,544)
|
0
|
|
| Interest accruals |
113,253
|
76,201
|
|
| Provisions and contingencies |
8,166
|
5,075
|
|
| Provisions and contingencies |
1,178,469
|
1,070,064
|
|
| Contingent liabilities (PPA) | Business combination – IPNET |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
0
|
(8,964)
|
|
| Contingent liabilities (PPA) | Business combination – Samauma |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
(2,462)
|
|
|
| Contingent liabilities (PPA) | Business combination – FiBrasil |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
(24,065)
|
|
|
| Contingent liabilities (PPA) | Business combination – Cyber |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
0
|
|
|
| Provision for fines for canceling lease agreements |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Other provisions |
41,950
|
41,005
|
40,993
|
| Additions (reversal), net |
3,296
|
(10,798)
|
|
| Additional provisions inflows except income, other provisions |
0
|
14,929
|
|
| Write-offs due to payment |
(2,351)
|
(4,119)
|
|
| Interest accruals |
0
|
0
|
|
| Provisions and contingencies |
41,950
|
41,005
|
|
| Provisions and contingencies |
0
|
0
|
|
| Provision for fines for canceling lease agreements | Business combination – IPNET |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
0
|
0
|
|
| Provision for fines for canceling lease agreements | Business combination – Samauma |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
0
|
|
|
| Provision for fines for canceling lease agreements | Business combination – FiBrasil |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
0
|
|
|
| Provision for fines for canceling lease agreements | Business combination – Cyber |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
0
|
|
|
| Provision for dismantling |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Other provisions |
410,524
|
412,214
|
407,246
|
| Additions (reversal), net |
(25,920)
|
(5,083)
|
|
| Additional provisions inflows except income, other provisions |
10,002
|
9,642
|
|
| Write-offs due to payment |
0
|
0
|
|
| Interest accruals |
14,228
|
409
|
|
| Provisions and contingencies |
596
|
3,265
|
|
| Provisions and contingencies |
409,928
|
408,949
|
|
| Provision for dismantling | Business combination – IPNET |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
0
|
0
|
|
| Provision for dismantling | Business combination – Samauma |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
0
|
|
|
| Provision for dismantling | Business combination – FiBrasil |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
0
|
|
|
| Provision for dismantling | Business combination – Cyber |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
0
|
|
|
| Amounts to be refunded to customers |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Other provisions |
0
|
90,663
|
R$ 96,601
|
| Additions (reversal), net |
(90,663)
|
0
|
|
| Additional provisions inflows except income, other provisions |
0
|
0
|
|
| Write-offs due to payment |
0
|
(5,938)
|
|
| Interest accruals |
0
|
0
|
|
| Provisions and contingencies |
0
|
90,663
|
|
| Provisions and contingencies |
0
|
0
|
|
| Amounts to be refunded to customers | Business combination – IPNET |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
0
|
R$ 0
|
|
| Amounts to be refunded to customers | Business combination – Samauma |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
0
|
|
|
| Amounts to be refunded to customers | Business combination – FiBrasil |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
0
|
|
|
| Amounts to be refunded to customers | Business combination – Cyber |
|
|
|
| Disclosure of other provisions [line items] |
|
|
|
| Acquisitions through business combinations, other provisions |
R$ 0
|
|
|