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30. OPERATING COSTS AND EXPENSES (Details 5) - BRL (R$)
R$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure of other operating income expense [abstract]      
Leasing and rentals [1] R$ 20 R$ 93 R$ 103
Advertising 9 19 30
Own consumption of energy 21 27 24
Subsidies and donations 40 22 19
Onerous concession 3 3 3
Insurance 12 7 8
CCEE annual charge 6 6 8
Net loss (gain) on deactivation and disposal of assets 92 7 193
Forluz - Administrative running cost 30 28 26
Collection agents 88 78 71
Gain on disposal, Taesa (207)
Fine for violation of service continuity standard 42
Obligations deriving from investment contracts [2] 32
Taxes and charges 10 9
Other expenses [3] 136 106 63
Other operating expenses (revenues), net R$ 499 R$ 405 R$ 383
[1] As from January 1, 2019, the amounts related to leasing and rentals are recognized in accordance with IFRS 16, as shown in notes 2.4 and 21. The Company has operational leasing contracts relating, mainly, to vehicles and buildings used in its operational activities. Their amounts are not material in relation to the total costs of the Company. Actual leasing and rentals expenses are related to remaining leasing arrangements and rentals that do not qualify for recognition under IFRS 16.
[2] This refers to claims under the agreement made between Alianca Geracao, Vale S.A. and Cemig. The action is provisioned at the cost of R$98, of which Cemig is responsible for R$32.
[3] The losses recorded on assets in progress (canceled works) are net of the reversal of the provisions constituted in prior periods. Includes the adjustment of R$22 for impairment of intangible assets.