ENERGY CO OF MINAS GERAIS
COMPANY
20-F/A
FORM
2019-06-03
FILING DATE
2018-12-31
FY PERIOD END
8008
FACTS
SIC 4911
CIK 0001157557
Taxonomy SEC IFRS 2018
SIC 4911
CIK 0001157557
Taxonomy SEC IFRS 2018
Standard Concepts
537
Extended Concepts
1527
74%
Extended Concepts
ERROR
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ERROR
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ERROR
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ERROR
Fact xcmig:ExercisePriceOfOptionAtFairValue context eol_PE106296--1820-F0009_STD_0_20171130_0_3416740x3481170_3475692x3566096 dimensionally not valid
ERROR
Fact xcmig:ExercisePriceOfOptionAtFairValue context eol_PE106296--1820-F0009_STD_0_20171130_0_3416740x3481170_3475692x3566126 dimensionally not valid
ERROR
Fact ifrs-full:NoncurrentDerivativeFinancialLiabilities context eol_PE106296--1820-F0009_STD_0_20171231_0 dimensionally not valid
ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
Fact ifrs-full:Borrowings context eol_PE106296--1820-F0009_STD_0_20171231_0_3418104x3500353_3424455x3492843 dimensionally not valid
ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
Fact xcmig:PercentageOfDecreaseInUnitedStatesDollar context eol_PE106296--1820-F0009_STD_0_20181231_0 dimensionally not valid
ERROR
Fact ifrs-full:FinancialAssets context eol_PE106296--1820-F0009_STD_0_20181231_0_3416696x3566149_3423286x3489813 dimensionally not valid
ERROR
Fact ifrs-full:FinancialAssetsAtFairValue context eol_PE106296--1820-F0009_STD_0_20181231_0_3416696x3566149_3423286x3489813 dimensionally not valid
ERROR
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ERROR
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ERROR
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ERROR
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ERROR
Fact xcmig:NetLiabilityExposureValue context eol_PE106296--1820-F0009_STD_0_20181231_0_3417147x3504776_3418104x3509025 dimensionally not valid
ERROR
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ERROR
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ERROR
Fact xcmig:NetLiabilityExposureValue context eol_PE106296--1820-F0009_STD_0_20181231_0_3417147x3504776_3422662x3493477 dimensionally not valid
ERROR
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ERROR
Fact xcmig:PutOption context eol_PE106296--1820-F0009_STD_0_20181231_0_3417651x3423793_3422662x3416700 dimensionally not valid
ERROR
Fact xcmig:PutOption context eol_PE106296--1820-F0009_STD_0_20181231_0_3417651x3423793_3422662x3423353 dimensionally not valid
ERROR
Fact xcmig:NetLiabilityExposureValue context eol_PE106296--1820-F0009_STD_0_20181231_0_3417666x3504944_3418104x3509025 dimensionally not valid
ERROR
Fact xcmig:NetLiabilityExposureValue context eol_PE106296--1820-F0009_STD_0_20181231_0_3417666x3504944_3422662x3487787 dimensionally not valid
ERROR
Fact xcmig:NetLiabilityExposureValue context eol_PE106296--1820-F0009_STD_0_20181231_0_3417666x3504944_3422662x3489644 dimensionally not valid
ERROR
Fact xcmig:NetLiabilityExposureValue context eol_PE106296--1820-F0009_STD_0_20181231_0_3417666x3504944_3422662x3493477 dimensionally not valid
ERROR
Fact xcmig:NetLiabilityExposureValue context eol_PE106296--1820-F0009_STD_0_20181231_0_3417666x3504944_3422662x3510327 dimensionally not valid
ERROR
Fact ifrs-full:Borrowings context eol_PE106296--1820-F0009_STD_0_20181231_0_3418104x3476057 dimensionally not valid
ERROR
Fact ifrs-full:Borrowings context eol_PE106296--1820-F0009_STD_0_20181231_0_3418104x3476057_3421968x3422054 dimensionally not valid
ERROR
Fact ifrs-full:Borrowings context eol_PE106296--1820-F0009_STD_0_20181231_0_3418104x3476057_3421968x3502495 dimensionally not valid
ERROR
Fact ifrs-full:Assets context eol_PE106296--1820-F0009_STD_0_20181231_0_3418104x3500353 dimensionally not valid
ERROR
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ERROR
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ERROR
Fact ifrs-full:NetAssetsLiabilities context eol_PE106296--1820-F0009_STD_0_20181231_0_3418104x3500353 dimensionally not valid
ERROR
Fact ifrs-full:ShorttermInvestmentsClassifiedAsCashEquivalents context eol_PE106296--1820-F0009_STD_0_20181231_0_3418104x3500353 dimensionally not valid
ERROR
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ERROR
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ERROR
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ERROR
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ERROR
Fact ifrs-full:FinancialAssets context eol_PE106296--1820-F0009_STD_0_20181231_0_3418104x3500353_3424455x3491342 dimensionally not valid
ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
Fact xcmig:NetLiabilityExposureValue context eol_PE106296--1820-F0009_STD_0_20181231_0_3418104x3566630_3422662x3493477_3475656x3499221 dimensionally not valid
ERROR
Fact xcmig:EffectOnExchangeRateVariation context eol_PE106296--1820-F0009_STD_0_20181231_0_3418104x3566631_3422662x3510327_3475656x3499220 dimensionally not valid
ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
Fact ifrs-full:Borrowings context eol_PE106296--1820-F0009_STD_0_20181231_0_3421937x3481228_3421968x3421294_3475694x3513837 dimensionally not valid
ERROR
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ERROR
Fact ifrs-full:Borrowings context eol_PE106296--1820-F0009_STD_0_20181231_0_3421937x3481228_3421968x3422054_3475694x3513837 dimensionally not valid
ERROR
Fact ifrs-full:Borrowings context eol_PE106296--1820-F0009_STD_0_20181231_0_3421937x3481228_3421968x3487165_3475694x3513837 dimensionally not valid
ERROR
Fact ifrs-full:Borrowings context eol_PE106296--1820-F0009_STD_0_20181231_0_3421937x3481228_3421968x3502495_3475694x3494497 dimensionally not valid
ERROR
Fact ifrs-full:Borrowings context eol_PE106296--1820-F0009_STD_0_20181231_0_3421937x3481228_3421968x3502495_3475694x3513837 dimensionally not valid
ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
Fact ifrs-full:Borrowings context eol_PE106296--1820-F0009_STD_0_20181231_0_3421968x3421294_3475694x3505437 dimensionally not valid
ERROR
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ERROR
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ERROR
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ERROR
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ERROR
Fact ifrs-full:Borrowings context eol_PE106296--1820-F0009_STD_0_20181231_0_3421968x3421917_3475694x3499002 dimensionally not valid
ERROR
Fact ifrs-full:Borrowings context eol_PE106296--1820-F0009_STD_0_20181231_0_3421968x3421917_3475694x3505437 dimensionally not valid
ERROR
Fact ifrs-full:Borrowings context eol_PE106296--1820-F0009_STD_0_20181231_0_3421968x3421917_3475694x3529623 dimensionally not valid
ERROR
Fact ifrs-full:Borrowings context eol_PE106296--1820-F0009_STD_0_20181231_0_3421968x3422054 dimensionally not valid
ERROR
Fact ifrs-full:Borrowings context eol_PE106296--1820-F0009_STD_0_20181231_0_3421968x3422054_3475694x3480564 dimensionally not valid
ERROR
Fact ifrs-full:Borrowings context eol_PE106296--1820-F0009_STD_0_20181231_0_3421968x3422054_3475694x3499002 dimensionally not valid
ERROR
Fact ifrs-full:Borrowings context eol_PE106296--1820-F0009_STD_0_20181231_0_3421968x3422054_3475694x3505253 dimensionally not valid
ERROR
Fact ifrs-full:Borrowings context eol_PE106296--1820-F0009_STD_0_20181231_0_3421968x3422054_3475694x3505437 dimensionally not valid
ERROR
Fact ifrs-full:Borrowings context eol_PE106296--1820-F0009_STD_0_20181231_0_3421968x3422054_3475694x3505553 dimensionally not valid
ERROR
Fact ifrs-full:Borrowings context eol_PE106296--1820-F0009_STD_0_20181231_0_3421968x3422054_3475694x3529623 dimensionally not valid
ERROR
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ERROR
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ERROR
Fact ifrs-full:Borrowings context eol_PE106296--1820-F0009_STD_0_20181231_0_3421968x3487165_3475694x3499002 dimensionally not valid
ERROR
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ERROR
Fact ifrs-full:Borrowings context eol_PE106296--1820-F0009_STD_0_20181231_0_3421968x3502495_3475694x3480564 dimensionally not valid
ERROR
Fact ifrs-full:Borrowings context eol_PE106296--1820-F0009_STD_0_20181231_0_3421968x3502495_3475694x3499002 dimensionally not valid
ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
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ERROR
Fact ifrs-full:Borrowings context eol_PE106296--1820-F0009_STD_0_20181231_0_3475694x3499002 dimensionally not valid
ERROR
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ERROR
Fact ifrs-full:Borrowings context eol_PE106296--1820-F0009_STD_0_20181231_0_3475694x3505253 dimensionally not valid
ERROR
Fact ifrs-full:Borrowings context eol_PE106296--1820-F0009_STD_0_20181231_0_3475694x3505437 dimensionally not valid
ERROR
Fact ifrs-full:Borrowings context eol_PE106296--1820-F0009_STD_0_20181231_0_3475694x3505553 dimensionally not valid
ERROR
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ERROR
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ERROR
Fact ifrs-full:BorrowingsInterestRate context eol_PE106296--1820-F0009_STD_0_20191231_0_3416696x3491342_3421584x3500108 dimensionally not valid
ERROR
Fact ifrs-full:BorrowingsInterestRate context eol_PE106296--1820-F0009_STD_0_20191231_0_3416696x3492843_3421584x3500108 dimensionally not valid
ERROR
Fact xcmig:PercentageOfDepreciationFromRealExchangeRate context eol_PE106296--1820-F0009_STD_0_20191231_0_3421584x3496902 dimensionally not valid
ERROR
Fact xcmig:PercentageOfDepreciationFromRealExchangeRate context eol_PE106296--1820-F0009_STD_0_20191231_0_3421584x3496904 dimensionally not valid
ERROR
Fact ifrs-full:ActuarialAssumptionOfExpectedRatesOfInflation context eol_PE106296--1820-F0009_STD_0_20191231_0_3421584x3500108_3424455x3489717 dimensionally not valid
ERROR
Fact ifrs-full:ActuarialAssumptionOfExpectedRatesOfInflation context eol_PE106296--1820-F0009_STD_0_20191231_0_3421584x3500108_3424455x3549063 dimensionally not valid
ERROR
Fact xcmig:PercentageOfEquityHolding context eol_PE106296--1820-F0009_STD_1_20171130_0_3416740x3481170_3422662x3416700_3475692x3481036 dimensionally not valid
ERROR
Fact xcmig:PercentageOfEquityHolding context eol_PE106296--1820-F0009_STD_1_20171130_0_3416740x3481170_3422662x3416700_3475692x3481037 dimensionally not valid
ERROR
Fact xcmig:PercentageOfEquityHolding context eol_PE106296--1820-F0009_STD_1_20171130_0_3416740x3481170_3422662x3423353_3475692x3481036 dimensionally not valid
ERROR
Fact xcmig:PercentageOfEquityHolding context eol_PE106296--1820-F0009_STD_1_20171130_0_3416740x3481170_3422662x3423353_3475692x3481037 dimensionally not valid
ERROR
Fact ifrs-full:ProportionOfVotingPowerHeldInSubsidiary context eol_PE106296--1820-F0009_STD_1_20181130_0_3416962x3566096 dimensionally not valid
ERROR
Fact xcmig:IncreaseInInflationRate context eol_PE106296--1820-F0009_STD_1_20191231_0_3421584x3500108_3424455x3489717 dimensionally not valid
ERROR
Fact xcmig:IncreaseInInflationRate context eol_PE106296--1820-F0009_STD_1_20191231_0_3421584x3500108_3424455x3549063 dimensionally not valid
ERROR
Fact xcmig:SwapOperationFloorRate context eol_PE106296--1820-F0009_STD_31_20180731_0 dimensionally not valid
ERROR
Fact xcmig:SwapCeilingRate context eol_PE106296--1820-F0009_STD_31_20180731_0 dimensionally not valid
ERROR
Fact xcmig:ValueOfPrincipalContracted context eol_PE106296--1820-F0009_STD_31_20180731_0 dimensionally not valid
ERROR
Fact xcmig:FXVariationInterestRate context eol_PE106296--1820-F0009_STD_31_20180731_0 dimensionally not valid
ERROR
Fact ifrs-full:GainsLossesOnDisposalsOfInvestments context eol_PE106296--1820-F0009_STD_365_20171231_0 dimensionally not valid
ERROR
Fact xcmig:SwapOperationFloorRate context eol_PE106296--1820-F0009_STD_365_20171231_0 dimensionally not valid
ERROR
Fact xcmig:SwapCeilingRate context eol_PE106296--1820-F0009_STD_365_20171231_0 dimensionally not valid
ERROR
Fact xcmig:ValueOfPrincipalContracted context eol_PE106296--1820-F0009_STD_365_20171231_0 dimensionally not valid
ERROR
Fact xcmig:FXVariationInterestRate context eol_PE106296--1820-F0009_STD_365_20171231_0 dimensionally not valid
ERROR
Fact xcmig:AdherenceToTheTaxAnmestyProgram context eol_PE106296--1820-F0009_STD_365_20171231_0_3418104x3500353 dimensionally not valid
ERROR
Fact ifrs-full:GainsLossesOnDisposalsOfInvestments context eol_PE106296--1820-F0009_STD_365_20181231_0 dimensionally not valid
ERROR
Fact xcmig:ExercisePriceOfPutOptionAsNumberOfTimesAdjustedNetProfit context eol_PE106296--1820-F0009_STD_365_20181231_0 dimensionally not valid
ERROR
Fact xcmig:ExercisePriceOfCallOptionAsNumberOfTimesAdjustedNetProfit context eol_PE106296--1820-F0009_STD_365_20181231_0 dimensionally not valid
ERROR
Fact xcmig:DescriptionOfAnnualRatesOfLoansAndDebentures context eol_PE106296--1820-F0009_STD_365_20181231_0 dimensionally not valid
ERROR
Fact xcmig:OptionVestingDate context eol_PE106296--1820-F0009_STD_365_20181231_0 dimensionally not valid
ERROR
Fact xcmig:DailyLiquidityProjectionPeriod context eol_PE106296--1820-F0009_STD_365_20181231_0 dimensionally not valid
ERROR
Fact xcmig:CashFlowProjectionPeriod context eol_PE106296--1820-F0009_STD_365_20181231_0 dimensionally not valid
ERROR
Fact xcmig:PercentageOfIncreaseInEuro context eol_PE106296--1820-F0009_STD_365_20181231_0 dimensionally not valid
ERROR
Fact ifrs-full:BorrowingsMaturity context eol_PE106296--1820-F0009_STD_365_20181231_0_3416696x3532720_3423286x3489813 dimensionally not valid
ERROR
Fact xcmig:ExercisePriceOfFinancialRemunerationPercentage context eol_PE106296--1820-F0009_STD_365_20181231_0_3416962x3493529 dimensionally not valid
ERROR
Fact xcmig:CalculationPercentageOfLoansFairValue context eol_PE106296--1820-F0009_STD_365_20181231_0_3417434x3489899 dimensionally not valid
ERROR
Fact xcmig:RiskFreeInterestRate context eol_PE106296--1820-F0009_STD_365_20181231_0_3417651x3423793_3422662x3416700 dimensionally not valid
ERROR
Fact xcmig:FinancialInstrumentsVolatilityRate context eol_PE106296--1820-F0009_STD_365_20181231_0_3417651x3423793_3422662x3416700 dimensionally not valid
ERROR
Fact xcmig:RiskFreeInterestRate context eol_PE106296--1820-F0009_STD_365_20181231_0_3417651x3423793_3422662x3423353 dimensionally not valid
ERROR
Fact xcmig:FinancialInstrumentsVolatilityRate context eol_PE106296--1820-F0009_STD_365_20181231_0_3417651x3423793_3422662x3423353 dimensionally not valid
ERROR
Fact xcmig:ExercisePriceOfFinancialRemunerationPercentage context eol_PE106296--1820-F0009_STD_365_20181231_0_3417651x3481033 dimensionally not valid
ERROR
Fact ifrs-full:InterestIncomeReimbursementRights context eol_PE106296--1820-F0009_STD_365_20181231_0_3418104x3500353_3424455x3567094 dimensionally not valid
ERROR
Fact ifrs-full:InterestIncomeReimbursementRights context eol_PE106296--1820-F0009_STD_365_20181231_0_3418104x3500353_3424455x3567095 dimensionally not valid
ERROR
Fact xcmig:NumberOfRiskRatingAgencies context eol_PE106296--1820-F0009_STD_365_20181231_0_3422662x3416700_3424456x3418098 dimensionally not valid
ERROR
Fact xcmig:BaselRatio context eol_PE106296--1820-F0009_STD_365_20181231_0_3422662x3416700_3424456x3418098 dimensionally not valid
ERROR
Fact xcmig:MarginalConcenterationRiskPercentage context eol_PE106296--1820-F0009_STD_365_20181231_0_3422662x3416700_3424456x3418098 dimensionally not valid
ERROR
Fact xcmig:MarginalConcenterationRiskPercentage context eol_PE106296--1820-F0009_STD_365_20181231_0_3422662x3423353_3424456x3418098 dimensionally not valid
ERROR
Fact xcmig:PercentageOfIncreaseInInterestRate context eol_PE106296--1820-F0009_STD_365_20191231_0_3416696x3491342_3421584x3500108 dimensionally not valid
ERROR
Fact xcmig:PercentageOfIncreaseInInterestRate context eol_PE106296--1820-F0009_STD_365_20191231_0_3416696x3492843_3421584x3500108 dimensionally not valid
ERROR
Context eol_PE106296--1820-F0009_STD_365_20181231_0_3418104x3423397 explicit dimension srt:CurrencyAxis member currency:USD is not a global member item
ERROR
Context eol_PE106296--1820-F0009_STD_365_20181231_0_3418104x3419751 explicit dimension srt:CurrencyAxis member currency:EUR is not a global member item
ERROR
Context eol_PE106296--1820-F0009_STD_0_20181231_0_3418104x3423397 explicit dimension srt:CurrencyAxis member currency:USD is not a global member item
ERROR
Context eol_PE106296--1820-F0009_STD_0_20181231_0_3418104x3419751 explicit dimension srt:CurrencyAxis member currency:EUR is not a global member item
ERROR
Context eol_PE106296--1820-F0009_STD_0_20181231_0_3417666x3504944_3418104x3423397 explicit dimension srt:CurrencyAxis member currency:USD is not a global member item
ERROR
Context eol_PE106296--1820-F0009_STD_0_20181231_0_3417147x3504776_3418104x3423397 explicit dimension srt:CurrencyAxis member currency:USD is not a global member item
ERROR
Context eol_PE106296--1820-F0009_STD_0_20171231_0_3418104x3423397 explicit dimension srt:CurrencyAxis member currency:USD is not a global member item
ERROR
Context eol_PE106296--1820-F0009_STD_0_20171231_0_3418104x3419751 explicit dimension srt:CurrencyAxis member currency:EUR is not a global member item
ERROR
Context eol_PE106296--1820-F0009_STD_0_20171231_0_3417666x3504944_3418104x3423397 explicit dimension srt:CurrencyAxis member currency:USD is not a global member item
ERROR
Context eol_PE106296--1820-F0009_STD_0_20171231_0_3417147x3504776_3418104x3423397 explicit dimension srt:CurrencyAxis member currency:USD is not a global member item
ERROR
There is a dimension-domain relationship from srt:CurrencyAxis but its target element (none) is not a domain. Please change the relationship or change the type of the target element.
ERROR
There is a dimension-domain relationship from srt:CurrencyAxis but its target element (none) is not a domain. Please change the relationship or change the type of the target element.
ERROR
There is a dimension-domain relationship from srt:CurrencyAxis but its target element (none) is not a domain. Please change the relationship or change the type of the target element.
ERROR
There is a dimension-domain relationship from srt:CurrencyAxis but its target element (none) is not a domain. Please change the relationship or change the type of the target element.
ERROR
There is a dimension-domain relationship from srt:CurrencyAxis but its target element (none) is not a domain. Please change the relationship or change the type of the target element.
ERROR
There is a dimension-domain relationship from srt:CurrencyAxis but its target element (none) is not a domain. Please change the relationship or change the type of the target element.
ERROR
There is a dimension-domain relationship from srt:CurrencyAxis but its target element (none) is not a domain. Please change the relationship or change the type of the target element.
ERROR
Element xcmig:DomesticCurrencyMember is used in a fact or context in the instance, but is not in any presentation relationships. Add the element to at least one presentation group.
ERROR
Element xcmig:OtherCurrencyMember is used in a fact or context in the instance, but is not in any presentation relationships. Add the element to at least one presentation group.
ERROR
Element xcmig:ForeignCurrencyRiskMember is used in a fact or context in the instance, but is not in any presentation relationships. Add the element to at least one presentation group.
ERROR
Element xcmig:ForeignCurrencyBorrowingsMember is used in a fact or context in the instance, but is not in any presentation relationships. Add the element to at least one presentation group.
ERROR
Element xcmig:ThreePointEightZeroBrazilRealPerUsDollarMember is used in a fact or context in the instance, but is not in any presentation relationships. Add the element to at least one presentation group.
ERROR
Element xcmig:FourPointSevenFiveBrazilRealPerUsDollarMember is used in a fact or context in the instance, but is not in any presentation relationships. Add the element to at least one presentation group.
ERROR
Element xcmig:FivePointSevenZeroBrazilRealPerUsDollarMember is used in a fact or context in the instance, but is not in any presentation relationships. Add the element to at least one presentation group.
What are errors?
What are errors?
Indicate problems with an XBRL formatted filing that are sufficient grounds for SEC rejection of the XBRL portion of the filing.
WARNING
In "http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialInstrumentsAndRiskManagementAdditionalInformation" axis xcmig:DisclosureOfFinancialInstrumentsAndFinancialRiskManagementTable has no domain element children, which effectively filters out every fact.
WARNING
In "http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialInstrumentsAndRiskManagementScheduleOfExposureToExchangeRates" axis ifrs-full:DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingTable has no domain element children, which effectively filters out every fact.
WARNING
In "http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialInstrumentsAndRiskManagementSummaryOfExposedInterestRateRisk" axis ifrs-full:DisclosureOfFinancialInstrumentsByTypeOfInterestRateTable has no domain element children, which effectively filters out every fact.
WARNING
In "http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialInstrumentsAndRiskManagementSummaryOfExposureToExchangeRates" axis ifrs-full:DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingTable has no domain element children, which effectively filters out every fact.
WARNING
In "http://imetrix.edgar-online.com/taxonomy/role/DisclosureLoansFinancingsAndDebenturesSummaryConsolidatedCompositionOfLoansFinancingsAndDebenturesByCurrencyAndIndexorWithTheRespectiveAmortization" axis ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable has no domain element children, which effectively filters out every fact.
WARNING
In "http://imetrix.edgar-online.com/taxonomy/role/DisclosureLoansFinancingsAndDebenturesSummaryOfTheCurrenciesAndIndexorsUsedForMonetaryUpdatingOfLoansAndFinancings" axis ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable has no domain element children, which effectively filters out every fact.
What are possible issues?
What are possible issues?
Indicate areas of interest as to the quality of an XBRL formatted filing, and in some cases reveal opportunities for improvement of the XBRL filing.