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29 Provisions for Legal Claims and Contingent Liabilities (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
DisclosureOfProvisionsForLegalClaimsAndContingentLiabilitiesLineItems [Line Items] |  |  |
Provisions for legal claims, beginning | R$ 1,606,713 |  | R$ 1,664,773
Provision for litigations, additions | 278,349 |  | 345,765
Provision for litigations, reversals | (121,856) |  | (81,651)
Construction cost, additions/(rev.) | (7,075) |  | 9,521
Additions to assets | 5,869 |  | 8,121
Discharges | (172,025) |  | (367,548)
Transfers/others | (34,271) | [1] | 27,732
Provisions for legal claims, ending | 1,555,704 |  | 1,606,713
Tax [member] |  |  |
DisclosureOfProvisionsForLegalClaimsAndContingentLiabilitiesLineItems [Line Items] |  |  |
Provisions for legal claims, beginning | 175,790 |  | 157,097
Provision for litigations, additions | 50,813 |  | 9,148
Provision for litigations, reversals | (49,381) |  | (16,884)
Construction cost, additions/(rev.) |  |  |
Additions to assets |  |  |
Discharges | (244) |  | (1,258)
Transfers/others | (3,105) | [1] | 27,687
Provisions for legal claims, ending | 173,873 |  | 175,790
Tax [member] | Cofins [member] |  |  |
DisclosureOfProvisionsForLegalClaimsAndContingentLiabilitiesLineItems [Line Items] |  |  |
Provisions for legal claims, beginning | 104,284 |  | 102,603
Provision for litigations, additions | 2,864 |  | 4,307
Provision for litigations, reversals |  |  | (2,626)
Construction cost, additions/(rev.) |  |  |
Additions to assets |  |  |
Discharges |  |  |
Transfers/others |  | [1] |
Provisions for legal claims, ending | 107,148 |  | 104,284
Tax [member] | Others [member] |  |  |
DisclosureOfProvisionsForLegalClaimsAndContingentLiabilitiesLineItems [Line Items] |  |  |
Provisions for legal claims, beginning | 71,506 |  | 54,494
Provision for litigations, additions | 47,949 |  | 4,841
Provision for litigations, reversals | (49,381) |  | (14,258)
Construction cost, additions/(rev.) |  |  |
Additions to assets |  |  |
Discharges | (244) |  | (1,258)
Transfers/others | (3,105) | [1] | 27,687
Provisions for legal claims, ending | 66,725 |  | 71,506
Labors [member] |  |  |
DisclosureOfProvisionsForLegalClaimsAndContingentLiabilitiesLineItems [Line Items] |  |  |
Provisions for legal claims, beginning | 673,062 |  | 612,782
Provision for litigations, additions | 102,315 |  | 194,550
Provision for litigations, reversals | (4,297) |  | (23)
Construction cost, additions/(rev.) |  |  |
Additions to assets |  |  |
Discharges | (145,228) |  | (134,247)
Transfers/others | (29,604) | [1] |
Provisions for legal claims, ending | 596,248 |  | 673,062
Employee Benefits [member] |  |  |
DisclosureOfProvisionsForLegalClaimsAndContingentLiabilitiesLineItems [Line Items] |  |  |
Provisions for legal claims, beginning | 86,297 |  | 85,199
Provision for litigations, additions | 11,439 |  | 27,426
Provision for litigations, reversals | (43,524) |  | (18,747)
Construction cost, additions/(rev.) |  |  |
Additions to assets |  |  |
Discharges | (783) |  | (7,581)
Transfers/others | (1,028) | [1] |
Provisions for legal claims, ending | 52,401 |  | 86,297
Civil [member] |  |  |
DisclosureOfProvisionsForLegalClaimsAndContingentLiabilitiesLineItems [Line Items] |  |  |
Provisions for legal claims, beginning | 591,756 |  | 736,222
Provision for litigations, additions | 102,827 |  | 106,715
Provision for litigations, reversals | (23,621) |  | (45,451)
Construction cost, additions/(rev.) | (7,075) |  | 9,521
Additions to assets | 5,869 |  | 8,121
Discharges | (24,739) |  | (223,417)
Transfers/others | (534) | [1] | 45
Provisions for legal claims, ending | 644,483 |  | 591,756
Civil [member] | Civil And Administrative Claims [member] |  |  |
DisclosureOfProvisionsForLegalClaimsAndContingentLiabilitiesLineItems [Line Items] |  |  |
Provisions for legal claims, beginning | 336,962 |  | 492,934
Provision for litigations, additions | 94,500 |  | 101,438
Provision for litigations, reversals | (20,581) |  | (36,271)
Construction cost, additions/(rev.) |  |  |
Additions to assets |  |  |
Discharges | (22,452) |  | (221,139)
Transfers/others | (534) | [1] |
Provisions for legal claims, ending | 387,895 |  | 336,962
Civil [member] | Easements [member] |  |  |
DisclosureOfProvisionsForLegalClaimsAndContingentLiabilitiesLineItems [Line Items] |  |  |
Provisions for legal claims, beginning | 127,010 |  | 118,147
Provision for litigations, additions | 286 |  | 711
Provision for litigations, reversals | (543) |  | (3,470)
Construction cost, additions/(rev.) | (13,748) |  | 12,456
Additions to assets | 667 |  | 1,012
Discharges | (2,119) |  | (1,891)
Transfers/others |  | [1] | 45
Provisions for legal claims, ending | 111,553 |  | 127,010
Civil [member] | Expropriations And Property [member] |  |  |
DisclosureOfProvisionsForLegalClaimsAndContingentLiabilitiesLineItems [Line Items] |  |  |
Provisions for legal claims, beginning | 118,757 |  | 116,401
Provision for litigations, additions | 4,634 |  | 2,844
Provision for litigations, reversals | (1,217) |  | (4,501)
Construction cost, additions/(rev.) | 6,673 |  | (2,935)
Additions to assets | 5,202 |  | 7,109
Discharges | (161) |  | (161)
Transfers/others |  | [1] |
Provisions for legal claims, ending | 133,888 |  | 118,757
Civil [member] | Customers [member] |  |  |
DisclosureOfProvisionsForLegalClaimsAndContingentLiabilitiesLineItems [Line Items] |  |  |
Provisions for legal claims, beginning | 4,956 |  | 5,209
Provision for litigations, additions | 299 |  | 390
Provision for litigations, reversals | (1,275) |  | (643)
Construction cost, additions/(rev.) |  |  |
Additions to assets |  |  |
Discharges | (7) |  |
Transfers/others |  | [1] |
Provisions for legal claims, ending | 3,973 |  | 4,956
Civil [member] | Environmental [member] |  |  |
DisclosureOfProvisionsForLegalClaimsAndContingentLiabilitiesLineItems [Line Items] |  |  |
Provisions for legal claims, beginning | 4,071 |  | 3,531
Provision for litigations, additions | 3,108 |  | 1,332
Provision for litigations, reversals | (5) |  | (226)
Construction cost, additions/(rev.) |  |  |
Additions to assets |  |  |
Discharges |  |  | (566)
Transfers/others |  | [1] |
Provisions for legal claims, ending | 7,174 |  | 4,071
Regulatory [member] |  |  |
DisclosureOfProvisionsForLegalClaimsAndContingentLiabilitiesLineItems [Line Items] |  |  |
Provisions for legal claims, beginning | 79,808 |  | 73,473
Provision for litigations, additions | 10,955 |  | 7,926
Provision for litigations, reversals | (1,033) |  | (546)
Construction cost, additions/(rev.) |  |  |
Additions to assets |  |  |
Discharges | (1,031) |  | (1,045)
Transfers/others |  | [1] |
Provisions for legal claims, ending | R$ 88,699 |  | R$ 79,808
[1] | Reclassification mainly to Liabilities associated with assets classified as held for sale (Note 40).

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