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Note 11 - Finance Cost and Income - Interest Expense (Details) - BRL (R$) R$ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement Line Items [Line Items]
Financial liabilities measured at amortized cost	R$ (477.6)	R$ (545.6)	R$ (423.1)
Liabilities at fair value through profit or loss	(1,076.2)	(961.0)	(601.3)
Fair value hedge - hedged items	(19.7)	(49.3)	(22.4)
Fair value hedge - hedging instruments	1.9	8.6	(15.8)
	R$ (1,571.6)	R$ (1,547.3)	R$ (1,062.6)

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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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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X

- Definition

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

+ References

No definition available.

+ Details

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Namespace Prefix:	abev_
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- References

No definition available.

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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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- 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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