XML 20 R13.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Cash and Cash Equivalents | 12 Months Ended
--- | ---
Dec. 31, 2017
Text block1 [abstract] |
Cash and Cash Equivalents |
6. | CASH AND CASH EQUIVALENTS
|  | 2017 |  |  | 2016 |
Bank accounts |  |  | 113 |  |  |  | 101 |
Cash equivalents |  |  |  |  |  |  |  |
Bank certificates of deposit (CDBs) (1) |  |  | 686 |  |  |  | 524 |
Overnight (2) |  |  | 227 |  |  |  | 370 |
Others |  |  | 4 |  |  |  | — |
|  |  | 917 |  |  |  | 894 |
|  |  | 1,030 |  |  |  | 995 |
(1) | Bank Certificates of Deposit (Certificados de Depósito Bancário, or CBDs), accrued intetest at 50% to 106%, of the CDI Rate (Interbank Rate for Interbank Certificates of Deposit or Certificados de Depósito Inter-bancário – CDIs) published by the Custody and Settlement Chamber (Câmara de Custódia e Liquidação, or Cetip) in 2017 (75% to 106% in 2016). For these CDBs, the Company has repo transactions which state, on their trading notes, the bank’s commitment to repurchase the security, on demand, on the maturity date of the transaction, or earlier, at the the Company’s option.
(2) | Overnight transactions are repos available for redemption on the following day. They are usually backed by Treasury Bills, Notes or Bonds and referenced to a pre-fixed rate of 6.89%, in 2017 (13.64% in 2016). Their purpose is to settle the Company’s short-term obligations, or to be used in the acquisition of other assets with better return to replenish the portfolio.

X
- Definition The disclosure of cash and cash equivalents. [Refer: Cash and cash equivalents] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_10_e&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_DisclosureOfCashAndCashEquivalentsExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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