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Employee Benefits and Private Pension Plan - Significant actuarial assumptions adopted (Detail) | Dec. 31, 2018 | Dec. 31, 2017
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Employee benefits and private pension plan details 3 [abstract] |  |
Discount rate for the actuarial obligation at present value | 9.00% | 9.51%
Average projected salary growth rate | 7.85% | 8.38%
Inflation rate (long term) | 4.00% | 4.50%
Growth rate of medical services | 8.16% | 8.68%

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- Definition The discount rate used as the significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2018-01-01 -Paragraph 144 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_144&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition Average projected salary growth rate. + References No definition available. + Details
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- Definition Employee benefits and private pension plan details 3. + References No definition available. + Details
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- Definition Growth rate of medical services. + References No definition available. + Details
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- Definition Inflation rate (long term). + References No definition available. + Details
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