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Note 27 - Financial Instruments and Risks (Details Textual) - BRL (R$) R$ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017
Statement Line Items [Line Items] |  |
Value at risk exposure, probable | 95.00% |
Value at risk, duration | 21 days |
Value at risk, adverse scenario, deterioration percentage | 25.00% |
Value at risk, remote scenario, deterioration percentage | 50.00% |
Guarantees held for derivative instruments | R$ 653.8 | R$ 606.3
Equity swap transaction [member] |  |
Statement Line Items [Line Items] |  |
Total gains (losses) on financial assets at fair value through profit or loss | (378.2) |
Equity price risk [member] |  |
Statement Line Items [Line Items] |  |
Risk exposure associated with instruments sharing characteristic | R$ 1,500.0 |
Bottom of range [member] |  |
Statement Line Items [Line Items] |  |
Trigger clause percentage, credit risk | 10.00% |
Top of range [member] |  |
Statement Line Items [Line Items] |  |
Trigger clause percentage, credit risk | 15.00% |

X
- Definition The amount of guarantees held for derivative instrument requirements. + References No definition available. + Details
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Namespace Prefix: | abev_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition The trigger clause percentage comparing the fair value of an operational to the notional value. + References No definition available. + Details
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Namespace Prefix: | abev_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition The value at risk under an adverse scenario relating to the deterioration percentage. + References No definition available. + Details
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Namespace Prefix: | abev_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of days under the Value at Risk exposure. + References No definition available. + Details
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Namespace Prefix: | abev_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition The percentage range for potential exposure under a probable scenario using Value at Risk. + References No definition available. + Details
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Period Type: | duration

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- Definition The value at risk under a remote scenario relating to the deterioration percentage. + References No definition available. + Details
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Namespace Prefix: | abev_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The gains (losses) on financial assets at fair value through profit or loss. [Refer: Financial assets at fair value through profit or loss] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 20 -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_20_a_i&doctype=Standard -URIDate 2017-03-09 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of risk exposure associated with financial instruments with a shared characteristic that identifies a concentration of risks. [Refer: Financial instruments, class [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph B8 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_B8_c&doctype=Appendix&seq=2 -URIDate 2017-03-09 + Details
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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

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- Details
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Balance Type: |
Period Type: |