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Note 21 - Changes in Equity - Capital Reserves (Details) - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Statement Line Items [Line Items] |  |
Balance, capital reserves | R$ 64,230.0 |
Balance, capital reserves | 63,361.2 | R$ 64,230.0
Treasury shares [member] |  |
Statement Line Items [Line Items] |  |
Balance, capital reserves | (908.7) | (1,003.5)
Purchase of shares and result on treasury shares | 13.7 | 94.8
Share-based payments, capital reserve |  |
Balance, capital reserves | (895.0) | (908.7)
Share premium [member] |  |
Statement Line Items [Line Items] |  |
Balance, capital reserves | 53,662.8 | 53,662.8
Purchase of shares and result on treasury shares |  |
Share-based payments, capital reserve |  |
Balance, capital reserves | 53,662.8 | 53,662.8
Other reserves [member] |  |
Statement Line Items [Line Items] |  |
Balance, capital reserves | 700.9 | 700.9
Purchase of shares and result on treasury shares |  |
Share-based payments, capital reserve |  |
Balance, capital reserves | 700.9 | 700.9
Reserve of share-based payments [member] |  |
Statement Line Items [Line Items] |  |
Balance, capital reserves | 1,074.9 | 1,013.4
Purchase of shares and result on treasury shares |  |
Share-based payments, capital reserve | 157.4 | 61.5
Balance, capital reserves | 1,232.3 | 1,074.9
Capital reserve [member] |  |
Statement Line Items [Line Items] |  |
Balance, capital reserves | 54,529.9 | 54,373.6
Purchase of shares and result on treasury shares | 13.7 | 94.8
Share-based payments, capital reserve | 157.4 | 61.5
Balance, capital reserves | R$ 54,701.0 | R$ 54,529.9

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- Definition The increase (decrease) in capital reserve resulting from share-based payment transactions. + References No definition available. + Details
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Namespace Prefix: | abev_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The increase (decrease) in capital reserve resulting from treasury share transactions. + References No definition available. + Details
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Namespace Prefix: | abev_
Data Type: | xbrli:monetaryItemType
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- References No definition available. + Details
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Data Type: | xbrli:stringItemType
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- Definition A component of equity representing the capital reserves. + 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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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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- Details
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Balance Type: |
Period Type: |

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- Details
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Balance Type: |
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- Details
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