33. Financial instruments and risk management (Details 4) - BRL (R$) R$ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disclosure of detailed information about financial instruments [line items]
Loans and financing current / non-current	R$ 2,543,039	R$ 1,103,206
Suppliers - Forfeiting	554,467	365,696	R$ 78,416
Liquidity Risk [Member]
Disclosure of detailed information about financial instruments [line items]
Loans and financing current / non-current	12,247,065	9,426,981
leases	9,105,368	1,917,671
Suppliers	1,296,406	1,523,952
Suppliers - Forfeiting	554,467	365,696
Derivatives	20,350	409,662
Liquidity risk	23,223,656	13,643,962
Liquidity Risk [Member] \| Current [Member]
Disclosure of detailed information about financial instruments [line items]
Loans and financing current / non-current	1,112,414	901,588
leases	1,257,430	227,985
Suppliers	1,286,264	1,403,793
Suppliers - Forfeiting	554,467	365,696
Derivatives	9,080	95,773
Liquidity risk	4,219,655	2,994,835
Liquidity Risk [Member] \| 1 to 5 Years [Member]
Disclosure of detailed information about financial instruments [line items]
Loans and financing current / non-current	7,519,263	3,692,463
leases	5,862,268	1,452,842
Suppliers	10,142	120,137
Derivatives	11,270	214,218
Liquidity risk	13,402,943	5,479,660
Liquidity Risk [Member] \| 6 to 12 Months [Member]
Disclosure of detailed information about financial instruments [line items]
Loans and financing current / non-current	1,724,940	438,386
leases	1,018,266	227,879
Suppliers		22
Derivatives		99,671
Liquidity risk	2,743,206	765,958
Liquidity Risk [Member] \| 2024 Thereafter [Member]
Disclosure of detailed information about financial instruments [line items]
Loans and financing current / non-current	1,890,448	4,394,544
leases	967,404	8,965
Liquidity risk	2,857,852	4,403,509
Liquidity Risk [Member] \| Carrying Amount [Member]
Disclosure of detailed information about financial instruments [line items]
Loans and financing current / non-current	8,409,841	6,443,807
leases	6,052,780	912,145
Suppliers	1,296,406	1,523,952
Suppliers - Forfeiting	554,567	365,696
Derivatives	20,350	409,662
Liquidity risk
Foreign Exchange Rate Risk [Member]
Disclosure of detailed information about financial instruments [line items]
Loans and financing current / non-current	(7,831,116)	(5,576,835)
leases	(6,007,973)	(271,485)
Derivatives	R$ (20,350)	R$ (409,662)

It represents value of foreign suppliers.

No definition available.

Name:	gol_ForeignSuppliers
Namespace Prefix:	gol_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

It represents value of other leases payable.

+ References

No definition available.

+ Details

Name:	gol_OtherLeasesPayable
Namespace Prefix:	gol_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

It represents value of short-term debt.

+ References

No definition available.

+ Details

Name:	gol_ShortTermDebt
Namespace Prefix:	gol_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of suppliers for forfeiting.

+ References

No definition available.

+ Details

Name:	gol_SuppliersForfeitingCurrent
Namespace Prefix:	gol_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of financial liabilities classified as derivative instruments. [Refer: Financial assets; Derivatives [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_55&doctype=Standard
-URIDate 2019-03-27

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfFinancialInstrumentsLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of financial assets held for managing liquidity risk (for example, financial assets that are readily saleable or expected to generate cash inflows to meet cash outflows on financial liabilities). [Refer: Liquidity risk [member]; Financial assets; Financial liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2019-01-01
-Paragraph B11E
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_B11E&doctype=Appendix&subtype=B
-URIDate 2019-03-27

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_CurrentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanSixMonthsAndNotLaterThanOneYearMember
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- Details

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- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_CarryingAmountMember
Namespace Prefix:
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- Details

Name:	ifrs-full_TypesOfRisksAxis=ifrs-full_CurrencyRiskMember
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