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INVESTMENTS (Details 4) - BRL (R$)
R$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Assets      
Current R$ 13,465 R$ 12,949  
  Cash and cash equivalents 1,441 825  
Non-current 40,206 39,097  
Total assets 53,671 52,046  
Liabilities      
Current 11,203 10,688  
Non-current 20,684 21,896  
Equity 21,784 19,462  
Total liabilities and equity 53,671 52,046  
Statement of income      
Net sales revenue 34,463 33,646 R$ 25,228
Cost of sales (27,651) (26,923) (19,845)
Gross income (loss) 6,812 6,723 5,383
General and administrative expenses (789) (572) (583)
Finance income 1,500 844 2,445
Finance expenses (3,066) (3,096) (3,350)
Net income (loss) for the year 4,094 3,753 2,865
Comprehensive income (loss) for the year      
Comprehensive income (loss) for the year 4,555 3,952 2,858
Equity valuation adjustments (1,874) (2,208) (2,431)
Taesa [Member]      
Assets      
Current 2,261 2,135 2,360
  Cash and cash equivalents 760 385 896
Non-current 13,198 13,761 11,745
Total assets 15,459 15,896 14,105
Liabilities      
Current 817 1,417 841
  Loans 1,957 16 121
Non-current 8,045 7,794 7,238
  Loans 372 614 923
Equity 6,597 6,685 6,026
Total liabilities and equity 15,459 15,896 14,105
Statement of income      
Net sales revenue 1,621 3,472 3,561
Cost of sales (176) (649) (1,048)
  Depreciation and amortization (9) (9) (7)
Gross income (loss) 1,445 2,823 2,513
General and administrative expenses (197) (169) (153)
Finance income 652 34 39
Finance expenses (1,700) (844) (514)
Operational income (loss) 200 1,844 1,885
Share of (loss) profit, net, of subsidiaries and joint ventures 925 781 834
Income tax and social contribution tax 324 (411) (456)
Net income (loss) for the year 1,449 2,214 2,263
Comprehensive income (loss) for the year      
Net income (loss) for the year 1,449 (2,214)  
Comprehensive income (loss) for the year 1,449 2,251 2,263
Equity valuation adjustments   37  
Lightger [Member]      
Assets      
Current 63 35 103
  Cash and cash equivalents 60 29 80
Non-current 109 120 129
Total assets 172 155 232
Liabilities      
Current 11 11 72
  Loans 9 9 9
Non-current 38 46 54
  Loans 38 46 54
Equity 123 98 106
Total liabilities and equity 172 155 232
Statement of income      
Net sales revenue 62 54 52
Cost of sales (17) (26) (9)
  Depreciation and amortization (12) (11) (11)
Gross income (loss) 45 28 43
General and administrative expenses (2) (1) (1)
Finance income 6 2 2
Finance expenses (4) (11) (16)
Operational income (loss) 45 18 28
Share of (loss) profit, net, of subsidiaries and joint ventures
Income tax and social contribution tax (4) (3) (2)
Net income (loss) for the year 41 15 26
Comprehensive income (loss) for the year      
Net income (loss) for the year 41 15  
Comprehensive income (loss) for the year 41 15 26
Equity valuation adjustments    
Hidreletrica cachoeirao [member]      
Assets      
Current 15 29 30
  Cash and cash equivalents 11 25 26
Non-current 91 93 80
Total assets 106 122 110
Liabilities      
Current 1 1 2
  Loans
Non-current 1 1
  Loans
Equity 104 120 108
Total liabilities and equity 106 122 110
Statement of income      
Net sales revenue 43 37 34
Cost of sales (12) (8) (15)
  Depreciation and amortization (3) (3) (3)
Gross income (loss) 31 29 19
General and administrative expenses
Finance income 4 2 1
Finance expenses
Operational income (loss) 35 31 20
Share of (loss) profit, net, of subsidiaries and joint ventures
Income tax and social contribution tax (3) (2) (1)
Net income (loss) for the year 32 29 19
Comprehensive income (loss) for the year      
Net income (loss) for the year 32 29  
Comprehensive income (loss) for the year 32 29 19
Equity valuation adjustments    
Hidreletrica pipoca [member]      
Assets      
Current 20 18 21
  Cash and cash equivalents 14 12 8
Non-current 98 101 89
Total assets 118 119 110
Liabilities      
Current 8 10 17
  Loans 7 7 7
Non-current 7 14 20
  Loans 7 13 20
Equity 103 95 73
Total liabilities and equity 118 119 110
Statement of income      
Net sales revenue 45 39 33
Cost of sales (10) (11) (6)
  Depreciation and amortization (3) (3)
Gross income (loss) 35 28 27
General and administrative expenses (1) (2) (1)
Finance income 3
Finance expenses (1) (2)  
Operational income (loss) 36 24 24
Share of (loss) profit, net, of subsidiaries and joint ventures
Income tax and social contribution tax (3) (1) (2)
Net income (loss) for the year 33 23 22
Comprehensive income (loss) for the year      
Net income (loss) for the year 33    
Comprehensive income (loss) for the year 33 23 22
Finance expenses     (2)
Retiro Baixo [Member]      
Assets      
Current 63 111 87
  Cash and cash equivalents 49 99 74
Non-current 338 322 331
Total assets 401 433 418
Liabilities      
Current 25 38 30
  Loans 14 14 14
Non-current 45 49 63
  Loans 28 41 55
Equity 331 346 325
Total liabilities and equity 401 433 418
Statement of income      
Net sales revenue 77 70 73
Cost of sales (4) (25) (29)
  Depreciation and amortization (9) (9) (11)
Gross income (loss) 73 45 44
General and administrative expenses (3) (3) (4)
Finance income 10 4 2
Finance expenses (5) (5)  
Operational income (loss) 75 41 36
Share of (loss) profit, net, of subsidiaries and joint ventures
Income tax and social contribution tax (26) (13) (3)
Net income (loss) for the year 49 28 33
Comprehensive income (loss) for the year      
Net income (loss) for the year 49    
Comprehensive income (loss) for the year 49 28 33
Finance expenses     (6)
Alianca norte (belo monte plant) [member]      
Assets      
Current
  Cash and cash equivalents
Non-current 1,092 1,150 1,189
Total assets 1,092 1,150 1,189
Liabilities      
Current
  Loans
Non-current 8 2
  Loans
Equity 1,084 1,148 1,189
Total liabilities and equity 1,092 1,150 1,189
Statement of income      
Net sales revenue
Cost of sales
  Depreciation and amortization
Gross income (loss)
General and administrative expenses (65) (2) (1)
Finance income
Finance expenses  
Operational income (loss) (65) (2) (1)
Share of (loss) profit, net, of subsidiaries and joint ventures (39) (77)
Income tax and social contribution tax
Net income (loss) for the year (65) (41) (78)
Comprehensive income (loss) for the year      
Net income (loss) for the year (65)    
Comprehensive income (loss) for the year (65) (41) (78)
Finance expenses    
Guanhaes Energia [Member]      
Assets      
Current 132 15 13
  Cash and cash equivalents 3 5 6
Non-current 376 392 405
Total assets 508 407 418
Liabilities      
Current 38 41 27
  Loans 12 12 12
Non-current 97 111 123
  Loans 80 93 106
Equity 373 255 268
Total liabilities and equity 508 407 418
Statement of income      
Net sales revenue 57 52 49
Cost of sales (45) (55) (36)
  Depreciation and amortization (16) (18) (17)
Gross income (loss) 12 (3) 13
General and administrative expenses
Finance income 90
Finance expenses (11) (8)  
Operational income (loss) 91 (11) 3
Share of (loss) profit, net, of subsidiaries and joint ventures
Income tax and social contribution tax (32) (2) (2)
Net income (loss) for the year 59 (13) 1
Comprehensive income (loss) for the year      
Net income (loss) for the year 59    
Comprehensive income (loss) for the year 59 (13) 1
Finance expenses     (10)
Amazonia Energia [Member]      
Assets      
Current
  Cash and cash equivalents
Non-current 1,191 1,254 1,296
Total assets 1,191 1,254 1,296
Liabilities      
Current 2 2
  Loans
Non-current
  Loans
Equity 1,189 1,252 1,296
Total liabilities and equity 1,191 1,254 1,296
Statement of income      
Net sales revenue
Cost of sales (2)
  Depreciation and amortization
Gross income (loss) (2)
General and administrative expenses
Finance income
Finance expenses  
Operational income (loss) (2)
Share of (loss) profit, net, of subsidiaries and joint ventures (63) (42) (84)
Income tax and social contribution tax
Net income (loss) for the year (63) (44) (84)
Comprehensive income (loss) for the year      
Net income (loss) for the year (63)    
Comprehensive income (loss) for the year (63) (44) (84)
Finance expenses    
Madeira energia (santo antonio plant) [member]      
Assets      
Current 1,819 928 945
  Cash and cash equivalents 924 180 263
Non-current 20,953 23,286 21,370
Total assets 22,772 24,214 22,315
Liabilities      
Current 2,571 2,309 1,150
  Loans 655 116 108
Non-current 19,972 20,413 18,906
  Loans 13,546 12,828 4,902
Equity 229 1,492 2,259
Total liabilities and equity 22,772 24,214 22,315
Statement of income      
Net sales revenue 4,137 3,758 3,200
Cost of sales (3,451) (2,292) (2,720)
  Depreciation and amortization (870) (869)
Gross income (loss) 686 1,466 480
General and administrative expenses (150) (80) (82)
Finance income 361 265 258
Finance expenses (3,521) (3,476)  
Operational income (loss) (2,624) (1,825) (1,456)
Share of (loss) profit, net, of subsidiaries and joint ventures
Income tax and social contribution tax (222) 1,812 10
Net income (loss) for the year (2,846) (13) (1,446)
Comprehensive income (loss) for the year      
Net income (loss) for the year (2,846)    
Comprehensive income (loss) for the year (2,846) (79) (1,446)
Finance expenses     (2,112)
Baguari Energia [Member]      
Assets      
Current 83 72 63
  Cash and cash equivalents 10 3 10
Non-current 205 218 209
Total assets 288 290 272
Liabilities      
Current 25 21 22
  Loans
Non-current 24 26 21
  Loans
Equity 239 243 229
Total liabilities and equity 288 290 272
Statement of income      
Net sales revenue 81 77 73
Cost of sales (31) (9) (30)
  Depreciation and amortization (10) (11) (11)
Gross income (loss) 50 68 43
General and administrative expenses 5
Finance income 10 4 2
Finance expenses (4) (1)
Operational income (loss) 60 68 49
Share of (loss) profit, net, of subsidiaries and joint ventures
Income tax and social contribution tax (20) (23) (17)
Net income (loss) for the year 40 45 32
Comprehensive income (loss) for the year      
Net income (loss) for the year 40    
Comprehensive income (loss) for the year 40 45 32
Alianca Geracao [Member]      
Assets      
Current 724 728 805
  Cash and cash equivalents 449 378 385
Non-current 3,468 3,364 2,461
Total assets 4,192 4,092 3,266
Liabilities      
Current 383 762 503
  Loans 136 101 19
Non-current 1,489 1,472 905
  Loans 713 700 261
Equity 2,320 1,858 1,858
Total liabilities and equity 4,192 4,092 3,266
Statement of income      
Net sales revenue 1,109 1,096 1,042
Cost of sales (608) (102) (580)
  Depreciation and amortization (124) (157) (154)
Gross income (loss) 501 994 462
General and administrative expenses (43) (44) (47)
Finance income 61 41 28
Finance expenses (109) (233) (63)
Operational income (loss) 410 758 380
Share of (loss) profit, net, of subsidiaries and joint ventures 11  
Income tax and social contribution tax (139) (252) (126)
Net income (loss) for the year 282 506 254
Comprehensive income (loss) for the year      
Net income (loss) for the year 282    
Comprehensive income (loss) for the year 282 506 254
Usina Hidreletrica Itaocara S A [Member]      
Assets      
Current 4    
  Cash and cash equivalents 4    
Non-current 11    
Total assets 15    
Liabilities      
Current    
  Loans    
Non-current    
  Loans    
Equity 15    
Total liabilities and equity 15    
Statement of income      
Net sales revenue    
Cost of sales    
  Depreciation and amortization    
Gross income (loss)    
General and administrative expenses    
Finance income    
Finance expenses (7)    
Operational income (loss) (7)    
Share of (loss) profit, net, of subsidiaries and joint ventures    
Income tax and social contribution tax    
Net income (loss) for the year (7)    
Comprehensive income (loss) for the year      
Net income (loss) for the year (7)    
Comprehensive income (loss) for the year (7)    
U F V Janauba [Member]      
Assets      
Current 4 1 3
  Cash and cash equivalents 3 1 2
Non-current 17 18 19
Total assets 21 19 22
Liabilities      
Current 2 2
  Loans 2
Non-current 12 12
  Loans 11
Equity 7 5 22
Total liabilities and equity 21 19 22
Statement of income      
Net sales revenue 5
Cost of sales 5 (2) 3
  Depreciation and amortization (1) (2) (1)
Gross income (loss) 5 3 3
General and administrative expenses
Finance income
Finance expenses (1) (1)
Operational income (loss) 4 2 3
Share of (loss) profit, net, of subsidiaries and joint ventures  
Income tax and social contribution tax (1) (1)
Net income (loss) for the year 3 1 3
Comprehensive income (loss) for the year      
Net income (loss) for the year 3    
Comprehensive income (loss) for the year 3 1 3
U F V Corinto [Member]      
Assets      
Current 2 3 2
  Cash and cash equivalents 1 2 1
Non-current 17 17 18
Total assets 19 20 20
Liabilities      
Current 1
  Loans
Non-current 1 1
  Loans
Equity 18 19 19
Total liabilities and equity 19 20 20
Statement of income      
Net sales revenue 6 4 3
Cost of sales (1)
  Depreciation and amortization (1) (1)
Gross income (loss) 5 4 3
General and administrative expenses (1) (1)
Finance income
Finance expenses
Operational income (loss) 5 3 2
Share of (loss) profit, net, of subsidiaries and joint ventures  
Income tax and social contribution tax (1)
Net income (loss) for the year 4 3 2
Comprehensive income (loss) for the year      
Net income (loss) for the year 4    
Comprehensive income (loss) for the year 4 3 2
U F V Manga [Member]      
Assets      
Current 2 3 1
  Cash and cash equivalents 1 2
Non-current 20 20 23
Total assets 22 23 24
Liabilities      
Current 1
  Loans
Non-current 1 2
  Loans
Equity 21 22 22
Total liabilities and equity 22 23 24
Statement of income      
Net sales revenue 7 6 3
Cost of sales (1)
  Depreciation and amortization (1) (1)
Gross income (loss) 6 6 3
General and administrative expenses (1) (2)
Finance income
Finance expenses
Operational income (loss) 6 5 1
Share of (loss) profit, net, of subsidiaries and joint ventures  
Income tax and social contribution tax (1) (1)
Net income (loss) for the year 5 4 1
Comprehensive income (loss) for the year      
Net income (loss) for the year 5    
Comprehensive income (loss) for the year 5 4 1
U F V Bonfinopolis I I [Member]      
Assets      
Current 2 2
  Cash and cash equivalents 1 2
Non-current 12 12 13
Total assets 14 14 13
Liabilities      
Current 1
  Loans  
Non-current 1
  Loans
Equity 13 13 13
Total liabilities and equity 14 14 13
Statement of income      
Net sales revenue 3
Cost of sales (1)
  Depreciation and amortization
Gross income (loss) (1) 3
General and administrative expenses (1)
Finance income 1
Finance expenses
Operational income (loss) 2
Share of (loss) profit, net, of subsidiaries and joint ventures  
Income tax and social contribution tax 3 (1)
Net income (loss) for the year 3 1
Comprehensive income (loss) for the year      
Net income (loss) for the year 3    
Comprehensive income (loss) for the year 3 1
U F V Lagoa Grande [Member]      
Assets      
Current 3 3 2
  Cash and cash equivalents 1 3 1
Non-current 23 23 24
Total assets 26 26 26
Liabilities      
Current
  Loans  
Non-current 1
  Loans  
Equity 25 26 26
Total liabilities and equity 26 26 26
Statement of income      
Net sales revenue 8 6 2
Cost of sales (1)
  Depreciation and amortization (1)  
Gross income (loss) 7 6 2
General and administrative expenses (1) (1)
Finance income  
Finance expenses  
Operational income (loss) 7 5 1
Share of (loss) profit, net, of subsidiaries and joint ventures    
Income tax and social contribution tax (1) (1)
Net income (loss) for the year 6 4 1
Comprehensive income (loss) for the year      
Net income (loss) for the year 6    
Comprehensive income (loss) for the year 6 4 1
U F V Lontra [Member]      
Assets      
Current 4 4
  Cash and cash equivalents 2 3
Non-current 27 26 29
Total assets 31 30 29
Liabilities      
Current 1 1 1
  Loans    
Non-current 1   1
  Loans    
Equity 29 29 27
Total liabilities and equity 31 30 29
Statement of income      
Net sales revenue 10 5
Cost of sales (1)   (1)
  Depreciation and amortization (1)  
Gross income (loss) 9 5 (1)
General and administrative expenses (1) (1)
Finance income    
Finance expenses    
Operational income (loss) 9 4 (2)
Share of (loss) profit, net, of subsidiaries and joint ventures    
Income tax and social contribution tax (1) (1)
Net income (loss) for the year 8 3 (2)
Comprehensive income (loss) for the year      
Net income (loss) for the year 8    
Comprehensive income (loss) for the year 8 3 (2)
U F V Olaria 1 [Member]      
Assets      
Current 1    
  Cash and cash equivalents 1    
Non-current 13    
Total assets 14    
Liabilities      
Current    
  Loans    
Non-current 1    
  Loans 1    
Equity 13    
Total liabilities and equity 14    
Statement of income      
Net sales revenue 2    
Cost of sales (1)    
  Depreciation and amortization (1)    
Gross income (loss) 1    
General and administrative expenses    
Finance income    
Finance expenses    
Operational income (loss) 1    
Share of (loss) profit, net, of subsidiaries and joint ventures    
Income tax and social contribution tax    
Net income (loss) for the year 1    
Comprehensive income (loss) for the year      
Net income (loss) for the year 1    
Comprehensive income (loss) for the year 1    
U F V Mato Verde [Member]      
Assets      
Current 1 1 1
  Cash and cash equivalents 1 1
Non-current 11 11 11
Total assets 12 12 12
Liabilities      
Current 1
  Loans    
Non-current  
  Loans    
Equity 12 11 12
Total liabilities and equity 12 12 12
Statement of income      
Net sales revenue 4 3
Cost of sales (1)  
  Depreciation and amortization  
Gross income (loss) 3 3
General and administrative expenses (1)
Finance income    
Finance expenses    
Operational income (loss) 3 2
Share of (loss) profit, net, of subsidiaries and joint ventures    
Income tax and social contribution tax
Net income (loss) for the year 3 2
Comprehensive income (loss) for the year      
Net income (loss) for the year 3    
Comprehensive income (loss) for the year 3 2
U F V Mirabela [Member]      
Assets      
Current 1 1
  Cash and cash equivalents 1
Non-current 9 9 9
Total assets 10 10 9
Liabilities      
Current 1
  Loans    
Non-current  
  Loans    
Equity 10 9 9
Total liabilities and equity 10 10 9
Statement of income      
Net sales revenue 3 2 1
Cost of sales (1)  
  Depreciation and amortization  
Gross income (loss) 2 2 1
General and administrative expenses (1)
Finance income    
Finance expenses    
Operational income (loss) 2 1 1
Share of (loss) profit, net, of subsidiaries and joint ventures    
Income tax and social contribution tax
Net income (loss) for the year 2 1 1
Comprehensive income (loss) for the year      
Net income (loss) for the year 2    
Comprehensive income (loss) for the year 2 1 1
U F V Porteirinha I [Member]      
Assets      
Current 1 3 1
  Cash and cash equivalents 2
Non-current 11 11 12
Total assets 12 14 13
Liabilities      
Current 1
  Loans    
Non-current 1  
  Loans 1    
Equity 11 13 13
Total liabilities and equity 12 14 13
Statement of income      
Net sales revenue 4 2
Cost of sales (1)  
  Depreciation and amortization  
Gross income (loss) 3 2
General and administrative expenses
Finance income    
Finance expenses    
Operational income (loss) 3 2
Share of (loss) profit, net, of subsidiaries and joint ventures    
Income tax and social contribution tax
Net income (loss) for the year 3 2
Comprehensive income (loss) for the year      
Net income (loss) for the year 3    
Comprehensive income (loss) for the year 3 2
U F V Porteirinha I I [Member]      
Assets      
Current 2 1
  Cash and cash equivalents 1
Non-current 11 12 12
Total assets 13 13 12
Liabilities      
Current 1
  Loans    
Non-current 1  
  Loans    
Equity 12 12 12
Total liabilities and equity 13 13 12
Statement of income      
Net sales revenue 4 3
Cost of sales (1)  
  Depreciation and amortization  
Gross income (loss) 3 3
General and administrative expenses (1) (1)
Finance income    
Finance expenses    
Operational income (loss) 3 2 (1)
Share of (loss) profit, net, of subsidiaries and joint ventures    
Income tax and social contribution tax 1
Net income (loss) for the year 3 2
Comprehensive income (loss) for the year      
Net income (loss) for the year 3    
Comprehensive income (loss) for the year 3 2
U F V Brasilandia [Member]      
Assets      
Current 3 3  
  Cash and cash equivalents 2 2  
Non-current 28 27  
Total assets 31 30  
Liabilities      
Current 4 3  
  Loans    
Non-current 1    
  Loans 3    
Equity 26 27  
Total liabilities and equity 31 30  
Statement of income      
Net sales revenue 8 5  
Cost of sales (2)    
  Depreciation and amortization (1)  
Gross income (loss) 6 5  
General and administrative expenses (1)  
Finance income 1    
Finance expenses    
Operational income (loss) 7 4  
Share of (loss) profit, net, of subsidiaries and joint ventures    
Income tax and social contribution tax (1) (1)  
Net income (loss) for the year 6 3  
Comprehensive income (loss) for the year      
Net income (loss) for the year 6    
Comprehensive income (loss) for the year 6 3  
U F V Apolo 1 [Member]      
Assets      
Current 1    
  Cash and cash equivalents    
Non-current 8    
Total assets 9    
Liabilities      
Current    
  Loans    
Non-current    
  Loans    
Equity 9    
Total liabilities and equity 9    
Statement of income      
Net sales revenue 2    
Cost of sales (1)    
  Depreciation and amortization    
Gross income (loss) 1    
General and administrative expenses    
Finance income    
Finance expenses    
Operational income (loss) 1    
Share of (loss) profit, net, of subsidiaries and joint ventures    
Income tax and social contribution tax    
Net income (loss) for the year 1    
Comprehensive income (loss) for the year      
Net income (loss) for the year 1    
Comprehensive income (loss) for the year 1    
U F V Campo Lindo 1 [Member]      
Assets      
Current 1    
  Cash and cash equivalents    
Non-current 13    
Total assets 14    
Liabilities      
Current    
  Loans    
Non-current 1    
  Loans 1    
Equity 13    
Total liabilities and equity 14    
Statement of income      
Net sales revenue 3    
Cost of sales (1)    
  Depreciation and amortization (1)    
Gross income (loss) 2    
General and administrative expenses    
Finance income    
Finance expenses    
Operational income (loss) 2    
Share of (loss) profit, net, of subsidiaries and joint ventures    
Income tax and social contribution tax    
Net income (loss) for the year 2    
Comprehensive income (loss) for the year      
Net income (loss) for the year 2    
Comprehensive income (loss) for the year 2    
U F V Campo Lindo 2 [Member]      
Assets      
Current 1    
  Cash and cash equivalents 1    
Non-current 13    
Total assets 14    
Liabilities      
Current    
  Loans    
Non-current 1    
  Loans 1    
Equity 13    
Total liabilities and equity 14    
Statement of income      
Net sales revenue 2    
Cost of sales (1)    
  Depreciation and amortization (1)    
Gross income (loss) 1    
General and administrative expenses    
Finance income    
Finance expenses    
Operational income (loss) 1    
Share of (loss) profit, net, of subsidiaries and joint ventures    
Income tax and social contribution tax    
Net income (loss) for the year 1    
Comprehensive income (loss) for the year      
Net income (loss) for the year 1    
Comprehensive income (loss) for the year R$ 1    
Hidreletrica Itaocara S A [Member]      
Assets      
Current   5 3
  Cash and cash equivalents   5 2
Non-current   11 10
Total assets   16 13
Liabilities      
Current   58 73
  Loans  
Non-current  
  Loans  
Equity   (42) (60)
Total liabilities and equity   16 13
Statement of income      
Net sales revenue  
Cost of sales   (36) (13)
  Depreciation and amortization  
Gross income (loss)   (36) (13)
General and administrative expenses  
Finance income  
Finance expenses   (30) (5)
Operational income (loss)   (66) (18)
Share of (loss) profit, net, of subsidiaries and joint ventures  
Income tax and social contribution tax  
Net income (loss) for the year   (66) (18)
Comprehensive income (loss) for the year      
Net income (loss) for the year   (66)  
Comprehensive income (loss) for the year   (66) (18)
Equity valuation adjustments    
Ativas Data Center [Member]      
Assets      
Current   42 39
  Cash and cash equivalents   16 12
Non-current   96 104
Total assets   138 143
Liabilities      
Current   39 39
  Loans   24 27
Non-current   19 18
  Loans   14 16
Equity   80 86
Total liabilities and equity   138 143
Statement of income      
Net sales revenue   90 94
Cost of sales   (85) (78)
  Depreciation and amortization   (10) (15)
Gross income (loss)   5 16
General and administrative expenses   (7) (8)
Finance income  
Finance expenses   (3) (3)
Operational income (loss)   (5) 5
Share of (loss) profit, net, of subsidiaries and joint ventures  
Income tax and social contribution tax   (2)
Net income (loss) for the year   (5) 3
Comprehensive income (loss) for the year      
Net income (loss) for the year   (5)  
Comprehensive income (loss) for the year   (5) 3
Equity valuation adjustments    
Axxiom Solucoes Tecnologicas [Member]      
Assets      
Current   13 20
  Cash and cash equivalents   4 3
Non-current   19 21
Total assets   32 41
Liabilities      
Current   21 25
  Loans   7 7
Non-current   2 7
  Loans   1
Equity   9 9
Total liabilities and equity   32 41
Statement of income      
Net sales revenue   28 41
Cost of sales   (28) (38)
  Depreciation and amortization   (1) (2)
Gross income (loss)   3
General and administrative expenses   (4) (5)
Finance income  
Finance expenses   (1) (1)
Operational income (loss)   (5) (3)
Share of (loss) profit, net, of subsidiaries and joint ventures  
Income tax and social contribution tax  
Net income (loss) for the year   (5) (3)
Comprehensive income (loss) for the year      
Net income (loss) for the year   (5)  
Comprehensive income (loss) for the year   (5) (3)
Equity valuation adjustments    
Renova [Member]      
Assets      
Current     998
  Cash and cash equivalents     29
Non-current     1,299
Total assets     2,297
Liabilities      
Current     725
  Loans     380
Non-current     2,680
  Loans     1,083
Equity     (1,108)
Total liabilities and equity     2,297
Statement of income      
Net sales revenue     70
Cost of sales     (46)
  Depreciation and amortization     (7)
Gross income (loss)     24
General and administrative expenses     (122)
Finance income    
Operational income (loss)     (72)
Share of (loss) profit, net, of subsidiaries and joint ventures     95
Income tax and social contribution tax     (1)
Net income (loss) for the year     22
Comprehensive income (loss) for the year      
Comprehensive income (loss) for the year     22
Finance expenses     R$ 26