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Recoverable Taxes (Tables) | 12 Months Ended
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Dec. 31, 2017
Text block1 [abstract] |
Summary of Recoverable Taxes |
|  | 2017 |  |  | 2016 |
Current |  |  |  |  |  |  |  |
ICMS (VAT) |  |  | 71 |  |  |  | 155 |
PIS and Pasep |  |  | 12 |  |  |  | 12 |
Cofins |  |  | 56 |  |  |  | 58 |
Others |  |  | 35 |  |  |  | 11 |
|  |  | 174 |  |  |  | 236 |
Non-current |  |  |  |  |  |  |  |
ICMS (VAT) |  |  | 225 |  |  |  | 171 |
PIS and Pasep |  |  | 1 |  |  |  | 1 |
Cofins |  |  | 3 |  |  |  | 5 |
Others |  |  | 2 |  |  |  | 1 |
|  |  | 231 |  |  |  | 178 |
|  |  | 405 |  |  |  | 414 |

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- Definition The disclosure of source of recoverable taxes. + References No definition available. + Details
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- Definition Text block1 [abstract] + References No definition available. + Details
Name: | xcmig_TextBlock1Abstract
Namespace Prefix: | xcmig_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration