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Note 11 - Finance Cost and Income - Interest Expense (Details) - BRL (R$) R$ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement Line Items [Line Items]
Financial instruments measured at amortized cost	R$ (597.6)	R$ (477.6)	R$ (545.6)
Financial instruments at fair value through profit or loss	(683.6)	(1,076.2)	(961.0)
Fair value hedge - hedged items		(19.7)	(49.3)
Fair value hedge - hedging instruments		1.9	8.6
Total	R$ (1,281.2)	R$ (1,571.6)	R$ (1,547.3)

X

- Definition

The amount of expense arising from interest through fair value hedging of hedged items.

+ References

No definition available.

+ Details

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Namespace Prefix:	abev_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount of expense arising from interest from fair values hedges from hedging instruments.

+ References

No definition available.

+ Details

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Namespace Prefix:	abev_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount of interest expense on instruments at fair value through profit or loss.

+ References

No definition available.

+ Details

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Namespace Prefix:	abev_
Data Type:	xbrli:monetaryItemType
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X

- References

No definition available.

+ Details

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Namespace Prefix:	abev_
Data Type:	xbrli:stringItemType
Balance Type:	na
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X

- Definition

The amount of expense arising from interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 8
-IssueDate 2017-01-01
-Paragraph 23
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2017-03-01&anchor=para_23_d&doctype=Standard
-URIDate 2017-03-09

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 8
-IssueDate 2017-01-01
-Paragraph 28
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2017-03-01&anchor=para_28_e&doctype=Standard
-URIDate 2017-03-09

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2017-01-01
-Paragraph B13
-Subparagraph f
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2017-03-01&anchor=para_B13_f&doctype=Appendix&seq=2
-URIDate 2017-03-09

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X

- Definition

The amount of interest expense on financial liabilities designated at fair value through profit or loss. [Refer: Interest expense; Financial liabilities at fair value through profit or loss, designated upon initial recognition or subsequently]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard
-URIDate 2017-03-09

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