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Note 23 - Employee Benefits - Net Liability for Defined Benefit Plans (Details) - BRL (R$) R$ in Millions | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | ---
Statement Line Items [Line Items] |  |  |
Present value of funded obligations | R$ (5,027.7) | R$ (4,592.1) | R$ (4,646.4)
Fair value of plan assets | 4,006.2 | 3,845.2 | 3,781.4
Present value of net obligations | (1,021.5) | (746.9) | (865.0)
Present value of unfunded obligations | (757.4) | (741.3) | (756.6)
Present value of net obligations, net | (1,778.9) | (1,488.2) | (1,621.6)
Asset ceiling | (368.4) | (532.2) | (534.5)
Net liability | (2,147.3) | (2,020.4) | (2,156.1)
Other long term employee benefits | (105.0) | (83.8) | (57.2)
Total employee benefits | (2,252.3) | (2,104.2) | (2,213.3)
Employee Benefits Amount - (Liabilities)/Assets | (2,252.3) | (2,104.2) | (2,213.3)
Employee benefits assets [member] |  |  |
Statement Line Items [Line Items] |  |  |
Total employee benefits | 58.4 | 33.5 | 8.6
Employee Benefits Amount - (Liabilities)/Assets | 58.4 | 33.5 | 8.6
Employee benefit liabilities [member] |  |  |
Statement Line Items [Line Items] |  |  |
Total employee benefits | (2,310.7) | (2,137.7) | (2,221.9)
Employee Benefits Amount - (Liabilities)/Assets | R$ (2,310.7) | R$ (2,137.7) | R$ (2,221.9)

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- Definition The present value of benefits available from refunds in the defined benefit plan or reductions in future contributions to the defined benefit plan. + References No definition available. + Details
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Namespace Prefix: | abev_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The present value of the funded portion, without deducting any plan assets, of expected future payments required to settle the obligation resulting from employee service in the current and prior periods. + References No definition available. + Details
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Namespace Prefix: | abev_
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Balance Type: | credit
Period Type: | instant

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- Definition The present value unfunded portion, without deducting any plan assets, of expected future payments required to settle the obligation resulting from employee service in the current and prior periods. + References No definition available. + Details
Name: | abev_DefinedBenefitObligationUnfundedPortionAtPresentValue
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The other long term employee benefit liabilities of the entity. + References No definition available. + Details
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Namespace Prefix: | abev_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | abev_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The present value, without deducting any plan assets, of expected future payments required to settle the obligation resulting from employee service in the current and prior periods. [Refer: Plan assets, at fair value] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 57 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_57_a&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of deficit or surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 140 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_140_a&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The fair value of defined benefit plan assets. Plan assets comprise assets held by a long-term employee benefit fund and qualifying insurance policies. [Refer: At fair value [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 57 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_57_a&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of deficit in a defined benefit plan. [Refer: Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_55&doctype=Standard -URIDate 2017-03-09 + Details
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Balance Type: | credit
Period Type: | instant

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- Definition The present value of the defined benefit obligation, less the fair value of the plan assets (if any). [Refer: Plan assets [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 57 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_57_a&doctype=Standard -URIDate 2017-03-09 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
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Namespace Prefix: |
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Balance Type: |
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- Details
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