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24. LOANS, FINANCING AND DEBENTURES (Detaills 6) - BRL (R$)
R$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure loans financings and debentures [abstract]      
Costs of loans and financing R$ 1,250 R$ 1,287 R$ 1,604
Financing costs on intangible assets and contract assets [1],[2] (23) (30) (71)
Net effect in Profit or loss R$ 1,227 R$ 1,257 R$ 1,533
[1] The average capitalization rate p.a. in 2019 was 6.79% (9.64% in 2018 and 14.28% in 2017).
[2] This refers to the credits recognized by the wholly-owned subsidiaries Sa Carvalho, Cemig Geracao Distribuida, Cemig Geracao Poco Fundo S.A. (previously denominated UTE Barreiro S.A.) and Horizontes Energia S.A..