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7. Cash and cash equivalents | 12 Months Ended
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Dec. 31, 2017
Cash and cash equivalents [abstract] |
Cash and cash equivalents |
| December 31, 2017 | December 31, 2016
Cash and banks | 171,951 | 137,395
Cash equivalents | 2,111,096 | 1,748,826
| 2,283,047 | 1,886,221
Cash and cash equivalents include cash, bank deposits and high-liquidity short-term financial investments, mainly represented by repurchase agreements (accruing CDI interest rates), deposited at Banco do Brasil, whose original maturities are lower than three months, which are convertible into a cash amount and subject to an insignificant risk of change in value. The average yield of financial investments corresponds to 98.88% of CDI in December 2017 (99.24% in December 2016).

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- 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
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