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Intangible assets - Additional Information (Detail) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 BRL (R$) | Dec. 31, 2018 BRL (R$)
Disclosure of detailed information about intangible assets [line items] |  |
Description of growth rate used to extrapolate cash flow projections | 5.00% |
Discounted cash flow projection period | 5 years |
Forecast period over cash flow to equity | 5 years |
Decrease percentage over cash flow to equity year one | 10.00% |
Decrease growth percentage over cash flow to equity year two to five | 10.00% |
Decrease of perpetuity rate | 250 |
Increase of pre tax discount rate | 500 |
Cash-generating units [member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Explanation of period over which management has projected cash flows | The recoverable amount of the Group’s single CGU is determined based on a value in use calculation using cash flow projections from financial budgets approved by senior management covering a five-year period. |
Description of discount rates applied to cash flow projections | 9.40% | 11.80%
Description of growth rate used to extrapolate cash flow projections | 5.00% | 6.00%
Software [member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Impairment Loss | R$ 0 | R$ 4,764

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- Definition The explanation of the period over which management has projected cash flows based on financial budgets/forecasts approved by management including, when a period greater than five years is used for a cash-generating unit (group of units), an explanation of why that longer period is justified. [Refer: Cash-generating units [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2019-01-01 -Paragraph 134 -Subparagraph d -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2019-en-r&anchor=para_134_d_iii&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2019-01-01 -Paragraph 134 -Subparagraph e -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2019-en-r&anchor=para_134_e_iii&doctype=Standard -URIDate 2019-03-27 + Details
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