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Finance Income and Expenses - Summary of Financial Income and Expenses (Parenthetical) (Detail)	May 17, 2018
Parajuru, Volta do Rio and Morgado [member] | Cemig GT [member]
Disclosure of finance income expense [line items]
Percentage of interest in investment property	49.00%

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- Definition

Disclosure of finance income expense [line items]

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- Definition

Percentage of interest in investment property.

+ References

No definition available.

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