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16. INVESTMENTS (Details 6) - BRL (R$)
R$ in Millions
 3 Months Ended 12 Months Ended
Apr. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Assets          
TOTAL CURRENT     R$ 15,456 R$ 10,354 [1] R$ 27,796
Cash and cash equivalents     1,680 536 891
TOTAL NON-CURRENT     38,627 40,172 [1] 32,059
TOTAL ASSETS     54,083 50,526 [1] 59,855
Liabilities          
Current     9,690 7,913 [1] 23,394
Suppliers     2,358 2,080 [1] 1,801
Total non-current liabilities     26,915 26,458 [1] 20,522
Equity     17,478 15,891 [1],[2] 15,939 [3]
TOTAL LIABILITIES AND EQUITY     54,083 50,526 [1] 43,916
Statement of income          
NET REVENUE     25,228 25,487 [1] 22,266
Cost of sales     (19,845)    
Depreciation and amortization     (865)    
Gross profit (loss)     5,383    
General and administrative expenses     (583)    
Finance income     2,445 3,207 [1] 1,706
Finance expenses     (3,350) (1,847) [1] (2,224)
Share of (loss) profit, net, of subsidiaries and joint ventures     357 125 [1] (104)
NET INCOME FOR THE YEAR R$ 2,864   2,865 3,194 [1] 1,764 [1]
COMPREHENSIVE INCOME FOR THE YEAR     2,858    
Centroeste [member]          
Assets          
TOTAL CURRENT       29 19
Cash and cash equivalents       27
TOTAL NON-CURRENT       35 36
TOTAL ASSETS       64 55
Liabilities          
Current       6 6
Loans and financings - Current       3 3
Total non-current liabilities       11 10
Loans and financings - Non-Current       8 10
Equity       47 39
TOTAL LIABILITIES AND EQUITY       64 55
Statement of income          
NET REVENUE       17 14
Cost of sales       (5) (1)
Depreciation and amortization       (1)
Gross profit (loss)       12 13
General and administrative expenses       (2)
Finance income       2 1
Finance expenses       (2) (3)
Operational profit (loss)       10 11
Share of (loss) profit, net, of subsidiaries and joint ventures      
Income tax and social contribution tax       (1) (1)
NET INCOME FOR THE YEAR       9 10
COMPREHENSIVE INCOME FOR THE YEAR       9 10
Ativas data center [member]          
Assets          
TOTAL CURRENT     39 33 17
Cash and cash equivalents     12 8 1
TOTAL NON-CURRENT     104 107 106
TOTAL ASSETS     143 140 123
Liabilities          
Current     39 24 23
Loans and financings - Current     27 13 9
Total non-current liabilities     18 34 16
Loans and financings - Non-Current     16 31 13
Equity     86 82 84
TOTAL LIABILITIES AND EQUITY     143 140 123
Statement of income          
NET REVENUE     94 83 70
Cost of sales     (78) (75) (72)
Depreciation and amortization     (15) (18)
Gross profit (loss)     16 8 (2)
General and administrative expenses     (8) (7) (16)
Finance income    
Finance expenses     (3) (3) (3)
Operational profit (loss)     5 (2) (21)
Share of (loss) profit, net, of subsidiaries and joint ventures    
Income tax and social contribution tax     (2)
NET INCOME FOR THE YEAR     3 (2) (21)
COMPREHENSIVE INCOME FOR THE YEAR     3 (2) (21)
TAESA [member]          
Assets          
TOTAL CURRENT     2,360 3,568 1,927
Cash and cash equivalents     896 83 21
TOTAL NON-CURRENT     11,745 7,662 6,689
TOTAL ASSETS     14,105 11,230 8,616
Liabilities          
Current     841 996 647
Loans and financings - Current     121 10 11
Total non-current liabilities     7,238 5,307 3,397
Loans and financings - Non-Current     923 4,159 410
Equity     6,026 4,927 4,572
TOTAL LIABILITIES AND EQUITY     14,105 11,230 8,616
Statement of income          
NET REVENUE     3,561 1,795 1,635
Cost of sales     (1,048) (574) (362)
Depreciation and amortization     (7) (5)
Gross profit (loss)     2,513 1,221 1,273
General and administrative expenses     (153) (122) (144)
Finance income     39 97 63
Finance expenses     (514) (356) (274)
Operational profit (loss)     1,885 840 918
Share of (loss) profit, net, of subsidiaries and joint ventures     834 306 301
Income tax and social contribution tax     (456) (144) (147)
NET INCOME FOR THE YEAR     2,263 1,002 1,072
COMPREHENSIVE INCOME FOR THE YEAR     2,263 1,002 1,072
Axxiom solucoes tecnologicas [member]          
Assets          
TOTAL CURRENT     20 34  
Cash and cash equivalents     3 7  
TOTAL NON-CURRENT     21 26  
TOTAL ASSETS     41 60  
Liabilities          
Current     25 28  
Loans and financings - Current     7 8  
Total non-current liabilities     7 5  
Loans and financings - Non-Current     1  
Equity     9 27  
TOTAL LIABILITIES AND EQUITY     41 60  
Statement of income          
NET REVENUE     41 53  
Cost of sales     (38) (54)  
Depreciation and amortization     (2) (2)  
Gross profit (loss)     3 (1)  
General and administrative expenses     (5) (11)  
Finance income      
Finance expenses     (1) (2)  
Operational profit (loss)     (3) (14)  
Share of (loss) profit, net, of subsidiaries and joint ventures      
Income tax and social contribution tax     5  
NET INCOME FOR THE YEAR     (3) (9)  
COMPREHENSIVE INCOME FOR THE YEAR     (3) (9)  
Hidreletrica cachoeirao [member]          
Assets          
TOTAL CURRENT     30 35 23
Cash and cash equivalents     26 30 18
TOTAL NON-CURRENT     80 82 85
TOTAL ASSETS     110 117 108
Liabilities          
Current     2 7 8
Loans and financings - Current    
Total non-current liabilities    
Loans and financings - Non-Current    
Equity     108 110 100
TOTAL LIABILITIES AND EQUITY     110 117 108
Statement of income          
NET REVENUE     34 38 50
Cost of sales     (15) (17) (29)
Depreciation and amortization     (3) (3) (3)
Gross profit (loss)     19 21 21
General and administrative expenses    
Finance income     1 1 1
Finance expenses    
Operational profit (loss)     20 22 22
Share of (loss) profit, net, of subsidiaries and joint ventures    
Income tax and social contribution tax     (1) (2) (2)
NET INCOME FOR THE YEAR     19 20 20
COMPREHENSIVE INCOME FOR THE YEAR     19 20 20
Hidreletrica pipoca [member]          
Assets          
TOTAL CURRENT     21 11 12
Cash and cash equivalents     8 2 4
TOTAL NON-CURRENT     89 89 95
TOTAL ASSETS     110 100 107
Liabilities          
Current     17 11 11
Loans and financings - Current     7 7 7
Total non-current liabilities     20 26 33
Loans and financings - Non-Current     20 26 33
Equity     73 63 63
TOTAL LIABILITIES AND EQUITY     110 100 107
Statement of income          
NET REVENUE     33 30 29
Cost of sales     (6) (15) (12)
Depreciation and amortization     (3) (3) (3)
Gross profit (loss)     27 15 17
General and administrative expenses     (1)
Finance income    
Finance expenses     (2) (3) (4)
Operational profit (loss)     24 12 13
Share of (loss) profit, net, of subsidiaries and joint ventures    
Income tax and social contribution tax     (2) (1) (1)
NET INCOME FOR THE YEAR     22 11 12
COMPREHENSIVE INCOME FOR THE YEAR     22 11 12
Retiro baixo [member]          
Assets          
TOTAL CURRENT     87 68 47
Cash and cash equivalents     74 56 36
TOTAL NON-CURRENT     331 343 354
TOTAL ASSETS     418 411 401
Liabilities          
Current     30 34 32
Loans and financings - Current     14 14 14
Total non-current liabilities     63 77 91
Loans and financings - Non-Current     55 68 82
Equity     325 300 278
TOTAL LIABILITIES AND EQUITY     418 411 401
Statement of income          
NET REVENUE     73 70 71
Cost of sales     (29) (30) (29)
Depreciation and amortization     (11) (9) (10)
Gross profit (loss)     44 40 42
General and administrative expenses     (4) (4) (4)
Finance income     2 3 2
Finance expenses     (6) (8) (11)
Operational profit (loss)     36 31 29
Share of (loss) profit, net, of subsidiaries and joint ventures    
Income tax and social contribution tax     (3) (3) (3)
NET INCOME FOR THE YEAR     33 28 26
COMPREHENSIVE INCOME FOR THE YEAR     33 28 26
Alianca norte (belo monte plant) [member]          
Assets          
TOTAL CURRENT     1
Cash and cash equivalents     1
TOTAL NON-CURRENT     1,189 1,266 1,247
TOTAL ASSETS     1,189 1,267 1,247
Liabilities          
Current     1
Loans and financings - Current    
Total non-current liabilities    
Loans and financings - Non-Current    
Equity     1,189 1,266 1,247
TOTAL LIABILITIES AND EQUITY     1,189 1,267 1,247
Statement of income          
NET REVENUE    
Cost of sales    
Depreciation and amortization    
Gross profit (loss)    
General and administrative expenses     (1) (2) (3)
Finance income     1
Finance expenses     (1)
Operational profit (loss)     (1) (2) (3)
Share of (loss) profit, net, of subsidiaries and joint ventures     (77) 19 97
Income tax and social contribution tax    
NET INCOME FOR THE YEAR     (78) 17 94
COMPREHENSIVE INCOME FOR THE YEAR     (78) 17 94
Renova [member]          
Assets          
TOTAL CURRENT     998 21 1,738
Cash and cash equivalents     29 5 15
TOTAL NON-CURRENT     1,299 2,269 867
TOTAL ASSETS     2,297 2,330 2,605
Liabilities          
Current     725 2,928 2,195
Loans and financings - Current     380 1,507 349
Total non-current liabilities     2,680 493 510
Loans and financings - Non-Current     1,083 55 64
Equity     (1,108) (1,130) (100)
TOTAL LIABILITIES AND EQUITY     2,297 2,291 2,605
Statement of income          
NET REVENUE     70 98 710
Cost of sales     (46) (66) (834)
Depreciation and amortization     (7) (9) (10)
Gross profit (loss)     24 32 (124)
General and administrative expenses     (122) (660) (458)
Finance income       3 3
Finance expenses     26 (448) (320)
Operational profit (loss)     (72) (1,073) (899)
Share of (loss) profit, net, of subsidiaries and joint ventures     95 66 49
Income tax and social contribution tax     (1) (7) (6)
NET INCOME FOR THE YEAR     22 (1,014) (856)
COMPREHENSIVE INCOME FOR THE YEAR     22 (1,014) (856)
Guanhaes energia [member]          
Assets          
TOTAL CURRENT     13 11  
Cash and cash equivalents     6 5  
TOTAL NON-CURRENT     405 419  
TOTAL ASSETS     418 430  
Liabilities          
Current     27 27  
Loans and financings - Current     12 12  
Total non-current liabilities     123 136  
Loans and financings - Non-Current     106 127  
Equity     268 267  
TOTAL LIABILITIES AND EQUITY     418 430  
Statement of income          
NET REVENUE     49 51  
Cost of sales     (36) (38)  
Depreciation and amortization     (17) (14)  
Gross profit (loss)     13 13  
General and administrative expenses     (5)  
Finance income     1  
Finance expenses     (10) (9)  
Operational profit (loss)     3  
Share of (loss) profit, net, of subsidiaries and joint ventures      
Income tax and social contribution tax     (2) (2)  
NET INCOME FOR THE YEAR     1 (2)  
COMPREHENSIVE INCOME FOR THE YEAR     1 (2)  
UFV Porteirinha II [member]          
Assets          
TOTAL CURRENT     1    
Cash and cash equivalents        
TOTAL NON-CURRENT     12    
TOTAL ASSETS     13    
Liabilities          
Current        
Total non-current liabilities        
Equity     13    
TOTAL LIABILITIES AND EQUITY     13    
Statement of income          
NET REVENUE        
Cost of sales        
Gross profit (loss)        
General and administrative expenses     (1)    
Operational profit (loss)     (1)    
Income tax and social contribution tax     1    
NET INCOME FOR THE YEAR        
COMPREHENSIVE INCOME FOR THE YEAR        
Amazonia energia (belo monte plant) [member]          
Assets          
TOTAL CURRENT    
Cash and cash equivalents    
TOTAL NON-CURRENT     1,296 1,380 1,360
TOTAL ASSETS     1,296 1,380 1,360
Liabilities          
Current     1 1
Loans and financings - Current    
Total non-current liabilities    
Loans and financings - Non-Current    
Equity     1,296 1,379 1,359
TOTAL LIABILITIES AND EQUITY     1,296 1,380 1,360
Statement of income          
NET REVENUE    
Cost of sales    
Depreciation and amortization    
Gross profit (loss)    
General and administrative expenses     (1)
Finance income     2
Finance expenses     (2)
Operational profit (loss)     (1)
Share of (loss) profit, net, of subsidiaries and joint ventures     (84) 20 105
Income tax and social contribution tax     (1)
NET INCOME FOR THE YEAR     (84) 20 103
COMPREHENSIVE INCOME FOR THE YEAR     (84) 20 103
Madeira energia (santo antonio plant) [member]          
Assets          
TOTAL CURRENT     945 750 618
Cash and cash equivalents     263 78 69
TOTAL NON-CURRENT     21,370 21,680 22,453
TOTAL ASSETS     22,315 22,430 23,071
Liabilities          
Current     1,150 1,177 1,281
Loans and financings - Current     108 73 53
Total non-current liabilities     18,906 17,548 17,134
Loans and financings - Non-Current     4,902 10,925 10,220
Equity     2,259 3,705 4,656
TOTAL LIABILITIES AND EQUITY     22,315 22,430 23,071
Statement of income          
NET REVENUE     3,200 3,198 3,006
Cost of sales     (2,720) (2,508) (2,689)
Depreciation and amortization     (869) (869) (887)
Gross profit (loss)     480 690 317
General and administrative expenses     (82) (99) (195)
Finance income     258 131 128
Finance expenses     (2,112) (1,683) (1,881)
Operational profit (loss)     (1,456) (961) (1,631)
Share of (loss) profit, net, of subsidiaries and joint ventures    
Income tax and social contribution tax     10 10 (112)
NET INCOME FOR THE YEAR     (1,446) (951) (1,743)
COMPREHENSIVE INCOME FOR THE YEAR     (1,446) (951) (1,743)
Baguari energia [member]          
Assets          
TOTAL CURRENT     63 60 44
Cash and cash equivalents     10 9 8
TOTAL NON-CURRENT     209 187 201
TOTAL ASSETS     272 247 245
Liabilities          
Current     22 16 7
Loans and financings - Current    
Total non-current liabilities     21 4 5
Loans and financings - Non-Current    
Equity     229 227 233
TOTAL LIABILITIES AND EQUITY     272 247 245
Statement of income          
NET REVENUE     73 68 74
Cost of sales     (30) (23) (31)
Depreciation and amortization     (11) (9) (9)
Gross profit (loss)     43 45 43
General and administrative expenses     5
Finance income     2 4 3
Finance expenses     (1) (1) (1)
Operational profit (loss)     49 48 45
Share of (loss) profit, net, of subsidiaries and joint ventures    
Income tax and social contribution tax     (17) (16) (4)
NET INCOME FOR THE YEAR     32 32 41
COMPREHENSIVE INCOME FOR THE YEAR     32 32 41
Lightger [member]          
Assets          
TOTAL CURRENT     103 87  
Cash and cash equivalents     80 69  
TOTAL NON-CURRENT     129 124  
TOTAL ASSETS     232 211  
Liabilities          
Current     72 53  
Loans and financings - Current     9 9  
Total non-current liabilities     54 63  
Loans and financings - Non-Current     54 63  
Equity     106 95  
TOTAL LIABILITIES AND EQUITY     232 211  
Statement of income          
NET REVENUE     52 50  
Cost of sales     (9) (27)  
Depreciation and amortization     (11) (11)  
Gross profit (loss)     43 23  
General and administrative expenses     (1) (2)  
Finance income     2 4  
Finance expenses     (16) (7)  
Operational profit (loss)     28 18  
Share of (loss) profit, net, of subsidiaries and joint ventures      
Income tax and social contribution tax     (2) (3)  
NET INCOME FOR THE YEAR     26 15  
COMPREHENSIVE INCOME FOR THE YEAR     26 15  
Alianca geracao [member]          
Assets          
TOTAL CURRENT     805 935 791
Cash and cash equivalents     385 435 381
TOTAL NON-CURRENT     2,461 2,409 2,440
TOTAL ASSETS     3,266 3,344 3,231
Liabilities          
Current     503 610 564
Loans and financings - Current     19 161 168
Total non-current liabilities     905 876 809
Loans and financings - Non-Current     261 276 348
Equity     1,858 1,858 1,858
TOTAL LIABILITIES AND EQUITY     3,266 3,344 3,231
Statement of income          
NET REVENUE     1,042 1,103 984
Cost of sales     (580) (681) (599)
Depreciation and amortization     (154) (151) (153)
Gross profit (loss)     462 422 385
General and administrative expenses     (47) (31) (31)
Finance income     28 39 33
Finance expenses     (63) (90) (89)
Operational profit (loss)     380 340 298
Share of (loss) profit, net, of subsidiaries and joint ventures    
Income tax and social contribution tax     (126) (111) (100)
NET INCOME FOR THE YEAR     254 229 198
COMPREHENSIVE INCOME FOR THE YEAR     254 R$ 229 198
Capital management [member]          
Assets          
Cash and cash equivalents     1,680   891
Liabilities          
Equity     17,478   15,939
TOTAL LIABILITIES AND EQUITY         R$ 43,916
Hidreletrica Itaocara S.A. [member]          
Assets          
TOTAL CURRENT     3    
Cash and cash equivalents     2    
TOTAL NON-CURRENT     10    
TOTAL ASSETS     13    
Liabilities          
Current     73    
Loans and financings - Current        
Total non-current liabilities        
Loans and financings - Non-Current        
Equity     (60)    
TOTAL LIABILITIES AND EQUITY     13    
Statement of income          
NET REVENUE        
Cost of sales     (13)    
Depreciation and amortization        
Gross profit (loss)     (13)    
General and administrative expenses        
Finance income        
Finance expenses     (5)    
Operational profit (loss)     (18)    
Share of (loss) profit, net, of subsidiaries and joint ventures        
Income tax and social contribution tax        
NET INCOME FOR THE YEAR     (18)    
COMPREHENSIVE INCOME FOR THE YEAR     (18)    
UFV Janauba [member]          
Assets          
TOTAL CURRENT     3    
Cash and cash equivalents     2    
TOTAL NON-CURRENT     19    
TOTAL ASSETS     22    
Liabilities          
Current        
Loans and financings - Current        
Total non-current liabilities        
Loans and financings - Non-Current        
Equity     22    
TOTAL LIABILITIES AND EQUITY     22    
Statement of income          
NET REVENUE        
Cost of sales     3    
Depreciation and amortization     (1)    
Gross profit (loss)     3    
General and administrative expenses        
Finance income        
Finance expenses        
Operational profit (loss)     3    
Share of (loss) profit, net, of subsidiaries and joint ventures        
Income tax and social contribution tax        
NET INCOME FOR THE YEAR     3    
COMPREHENSIVE INCOME FOR THE YEAR     3    
UFV Corinto [member]          
Assets          
TOTAL CURRENT     2    
Cash and cash equivalents     1    
TOTAL NON-CURRENT     18    
TOTAL ASSETS     20    
Liabilities          
Current        
Loans and financings - Current        
Total non-current liabilities     1    
Loans and financings - Non-Current        
Equity     19    
TOTAL LIABILITIES AND EQUITY     20    
Statement of income          
NET REVENUE     3    
Cost of sales        
Depreciation and amortization     (1)    
Gross profit (loss)     3    
General and administrative expenses     (2)    
Finance income        
Finance expenses        
Operational profit (loss)     1    
Share of (loss) profit, net, of subsidiaries and joint ventures        
Income tax and social contribution tax        
NET INCOME FOR THE YEAR     1    
COMPREHENSIVE INCOME FOR THE YEAR     1    
UFV Manga [member]          
Assets          
TOTAL CURRENT     1    
Cash and cash equivalents        
TOTAL NON-CURRENT     23    
TOTAL ASSETS     24    
Liabilities          
Current        
Loans and financings - Current        
Total non-current liabilities     2    
Loans and financings - Non-Current        
Equity     22    
TOTAL LIABILITIES AND EQUITY     24    
Statement of income          
NET REVENUE     3    
Cost of sales        
Depreciation and amortization     (1)    
Gross profit (loss)     3    
General and administrative expenses     (2)    
Finance income        
Finance expenses        
Operational profit (loss)     1    
Share of (loss) profit, net, of subsidiaries and joint ventures        
Income tax and social contribution tax        
NET INCOME FOR THE YEAR     1    
COMPREHENSIVE INCOME FOR THE YEAR     1    
UFV Bonfinopolis II [member]          
Assets          
TOTAL CURRENT        
Cash and cash equivalents        
TOTAL NON-CURRENT     13    
TOTAL ASSETS     13    
Liabilities          
Current        
Total non-current liabilities        
Loans and financings - Non-Current        
Equity     13    
TOTAL LIABILITIES AND EQUITY     13    
Statement of income          
NET REVENUE        
Cost of sales        
Depreciation and amortization        
Gross profit (loss)        
General and administrative expenses        
Finance income        
Finance expenses        
Operational profit (loss)        
Share of (loss) profit, net, of subsidiaries and joint ventures        
Income tax and social contribution tax        
NET INCOME FOR THE YEAR        
COMPREHENSIVE INCOME FOR THE YEAR        
UFV Lagoa Grande [member]          
Assets          
TOTAL CURRENT     2    
Cash and cash equivalents     1    
TOTAL NON-CURRENT     24    
TOTAL ASSETS     26    
Liabilities          
Current        
Total non-current liabilities        
Equity     26    
TOTAL LIABILITIES AND EQUITY     26    
Statement of income          
NET REVENUE     2    
Cost of sales        
Gross profit (loss)     2    
General and administrative expenses     (1)    
Operational profit (loss)     1    
Income tax and social contribution tax        
NET INCOME FOR THE YEAR     1    
COMPREHENSIVE INCOME FOR THE YEAR     1    
UFV Lontra [member]          
Assets          
TOTAL CURRENT        
Cash and cash equivalents        
TOTAL NON-CURRENT     29    
TOTAL ASSETS     29    
Liabilities          
Current     1    
Total non-current liabilities     1    
Equity     27    
TOTAL LIABILITIES AND EQUITY     29    
Statement of income          
NET REVENUE        
Cost of sales     (1)    
Gross profit (loss)     (1)    
General and administrative expenses     (1)    
Operational profit (loss)     (2)    
Income tax and social contribution tax        
NET INCOME FOR THE YEAR     (2)    
COMPREHENSIVE INCOME FOR THE YEAR     (2)    
UFV Mato Verde [member]          
Assets          
TOTAL CURRENT     1    
Cash and cash equivalents        
TOTAL NON-CURRENT     11    
TOTAL ASSETS     12    
Liabilities          
Current        
Total non-current liabilities        
Equity     12    
TOTAL LIABILITIES AND EQUITY     12    
Statement of income          
NET REVENUE        
Cost of sales        
Gross profit (loss)        
General and administrative expenses        
Operational profit (loss)        
Income tax and social contribution tax        
NET INCOME FOR THE YEAR        
COMPREHENSIVE INCOME FOR THE YEAR        
UFV Mirabela [member]          
Assets          
TOTAL CURRENT        
Cash and cash equivalents        
TOTAL NON-CURRENT     9    
TOTAL ASSETS     9    
Liabilities          
Current        
Total non-current liabilities        
Equity     9    
TOTAL LIABILITIES AND EQUITY     9    
Statement of income          
NET REVENUE     1    
Cost of sales        
Gross profit (loss)     1    
General and administrative expenses        
Operational profit (loss)     1    
Income tax and social contribution tax        
NET INCOME FOR THE YEAR     1    
COMPREHENSIVE INCOME FOR THE YEAR     1    
UFV Porteirinha I [member]          
Assets          
TOTAL CURRENT        
Cash and cash equivalents        
TOTAL NON-CURRENT     12    
TOTAL ASSETS     12    
Liabilities          
Current        
Total non-current liabilities        
Equity     12    
TOTAL LIABILITIES AND EQUITY     R$ 12    
Statement of income          
NET REVENUE        
Cost of sales        
Gross profit (loss)        
General and administrative expenses        
Operational profit (loss)        
Income tax and social contribution tax        
NET INCOME FOR THE YEAR        
COMPREHENSIVE INCOME FOR THE YEAR        
[1] See note 2.8.
[2] For further details of restatement of comparative balances, see Note 2.8
[3] The wholly-owned subsidiary Cemig D was over contracted in 2017 and 2018 and the gain arising from the sale of the excess of energy in the spot market was provisionally passed through to customers by Aneel in the tariff adjustments of 2018 and 2019, including the portion in excess of the limit of 105% of the regulatory load - thus reducing the tariff that was determined. To establish whether this is a voluntary over contracting, the Company considers that the portion above the regulatory limit will be recovered in the subsequent tariff adjustment. On August 27, 2020, Aneel published the Dispatch 2,508/2020-SRM-SGT, which set new amounts for distributors' over contracting for the years 2016 and 2017, based on a new valuation criterion established by Aneel Technical Note 97/2020-SRM-SGT - not contained in the regulatory rules which were currently in force. As a result, Cemig D filed an appeal with the Council of Aneel, for the amounts of distribution agents' over contracting to be reset in accordance with the calculation criteria based on maximum effort contained in Aneel Normative Resolution 453/2011. The Company's position on this case is reinforced by the fact that the Brazilian Energy Distributors' Association (Abradee) filed a similar appeal, supported by the opinion of contracted legal advisersadvisors. The Company has no expectation of loss in relation to realization of these amounts. The Company recognizes this receivable asset, in the amount of R$222 on December 31, 2020, as Other financial components' to be ratified. At the reporting date for this financial statements, this matter was still pending analysis by Aneel.