XML 139 R103.htm IDEA: XBRL DOCUMENT v3.22.1
Schedule of generation indemnity receivable (Details)
R$ in Millions
 12 Months Ended
Dec. 31, 2021
BRL (R$)
MW
IfrsStatementLineItems [Line Items]  
Installed capacity (MW) | MW 3,601.70
Net balance of assets based on historical cost R$ 204
Net balance of assets based on fair value (replacement cost) R$ 816
Usina Hidreletrica Tres marias [member]  
IfrsStatementLineItems [Line Items]  
Concession expiration date July 2015
Installed capacity (MW) | MW 396,000,000
Net balance of assets based on historical cost R$ 71
Net balance of assets based on fair value (replacement cost) R$ 413
Usina Hidreletrica Salto Grande [Member]  
IfrsStatementLineItems [Line Items]  
Concession expiration date July 2015
Installed capacity (MW) | MW 102,000,000
Net balance of assets based on historical cost R$ 11
Net balance of assets based on fair value (replacement cost) R$ 39
Usina Hidreletrica Itutinga [Member]  
IfrsStatementLineItems [Line Items]  
Concession expiration date July 2015
Installed capacity (MW) | MW 52,000,000
Net balance of assets based on historical cost R$ 3
Net balance of assets based on fair value (replacement cost) R$ 7
Usina Hidreletrica Camargos [Member]  
IfrsStatementLineItems [Line Items]  
Concession expiration date July 2015
Installed capacity (MW) | MW 46,000,000
Net balance of assets based on historical cost R$ 8
Net balance of assets based on fair value (replacement cost) R$ 23
Cemig P C H Piau [Member]  
IfrsStatementLineItems [Line Items]  
Concession expiration date July 2015
Installed capacity (MW) | MW 18.01
Net balance of assets based on historical cost R$ 2
Net balance of assets based on fair value (replacement cost) R$ 9
Cemig P C H Gafanhoto [Member]  
IfrsStatementLineItems [Line Items]  
Concession expiration date July 2015
Installed capacity (MW) | MW 14,000,000
Net balance of assets based on historical cost R$ 1
Net balance of assets based on fair value (replacement cost) R$ 10
Cemig P C H Peti [Member]  
IfrsStatementLineItems [Line Items]  
Concession expiration date July 2015
Installed capacity (MW) | MW 9.4
Net balance of assets based on historical cost R$ 1
Net balance of assets based on fair value (replacement cost) R$ 8
Cemig P C H Dona Rita [Member]  
IfrsStatementLineItems [Line Items]  
Concession expiration date Sep. 2013
Installed capacity (MW) | MW 2.41
Net balance of assets based on historical cost R$ 1
Net balance of assets based on fair value (replacement cost) R$ 1
Cemig P C H Tronqueiras [Member]  
IfrsStatementLineItems [Line Items]  
Concession expiration date July 2015
Installed capacity (MW) | MW 8.5
Net balance of assets based on historical cost R$ 2
Net balance of assets based on fair value (replacement cost) R$ 12
Cemig P C H Joasal [Member]  
IfrsStatementLineItems [Line Items]  
Concession expiration date July 2015
Installed capacity (MW) | MW 8.4
Net balance of assets based on historical cost R$ 1
Net balance of assets based on fair value (replacement cost) R$ 8
Cemig P C H Martins [Member]  
IfrsStatementLineItems [Line Items]  
Concession expiration date July 2015
Installed capacity (MW) | MW 7.7
Net balance of assets based on historical cost R$ 2
Net balance of assets based on fair value (replacement cost) R$ 4
Cemig P C H Cajuru [Member]  
IfrsStatementLineItems [Line Items]  
Concession expiration date July 2015
Installed capacity (MW) | MW 7.2
Net balance of assets based on historical cost R$ 4
Net balance of assets based on fair value (replacement cost) R$ 4
Cemig P C H Paciencia [Member]  
IfrsStatementLineItems [Line Items]  
Concession expiration date July 2015
Installed capacity (MW) | MW 4.08
Net balance of assets based on historical cost R$ 1
Net balance of assets based on fair value (replacement cost) R$ 4
Cemig P C H Marmelos [Member]  
IfrsStatementLineItems [Line Items]  
Concession expiration date July 2015
Installed capacity (MW) | MW 4,000,000
Net balance of assets based on historical cost R$ 1
Net balance of assets based on fair value (replacement cost) R$ 4
Usina Hidreletrica Volta Grande [Member]  
IfrsStatementLineItems [Line Items]  
Concession expiration date Feb. 2017
Installed capacity (MW) | MW 380,000,000
Net balance of assets based on historical cost R$ 26
Net balance of assets based on fair value (replacement cost) R$ 70
Usina Hidreletrica Miranda [Member]  
IfrsStatementLineItems [Line Items]  
Concession expiration date Dec. 2016
Installed capacity (MW) | MW 408,000,000
Net balance of assets based on historical cost R$ 27
Net balance of assets based on fair value (replacement cost) R$ 23
Usina Hidreletrica Jaguara [Member]  
IfrsStatementLineItems [Line Items]  
Concession expiration date Aug. 2013
Installed capacity (MW) | MW 424,000,000
Net balance of assets based on historical cost R$ 40
Net balance of assets based on fair value (replacement cost) R$ 174
Usina Hidreletrica Sao Simao [Member]  
IfrsStatementLineItems [Line Items]  
Concession expiration date Jan. 2015
Installed capacity (MW) | MW 1,710,000,000
Net balance of assets based on historical cost R$ 2
Net balance of assets based on fair value (replacement cost) R$ 3