XML 101 R76.htm IDEA: XBRL DOCUMENT
v3.22.1

TAX CREDITS - Realization of non-current tax credits (Details) - BRL (R$) R$ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Estimates of realization of non-current tax credits |  |
Tax credits - non-current | R$ 124,600 | R$ 664,045
Tax credits |  |
Estimates of realization of non-current tax credits |  |
Tax credits - non-current | 124,600 | 664,045
Tax credits | 2022. |  |
Estimates of realization of non-current tax credits |  |
Tax credits - non-current |  | 584,145
Tax credits | 2023. |  |
Estimates of realization of non-current tax credits |  |
Tax credits - non-current | 64,426 | 22,433
Tax credits | 2024. |  |
Estimates of realization of non-current tax credits |  |
Tax credits - non-current | 40,853 | 8,054
Tax credits | 2025. |  |
Estimates of realization of non-current tax credits |  |
Tax credits - non-current | 11,660 | R$ 49,413
Tax credits | 2026 and after |  |
Estimates of realization of non-current tax credits |  |
Tax credits - non-current | R$ 7,661 |

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

X
- Definition The amount of non-current receivables from taxes other than income tax. [Refer: Receivables from taxes other than income tax] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 78 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_78_b&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_NoncurrentReceivablesFromTaxesOtherThanIncomeTax
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis=ifrs-full_UnusedTaxCreditsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ggb_IfrsTaxPeriodAxis=ggb_IfrsTaxYear2022Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ggb_IfrsTaxPeriodAxis=ggb_IfrsTaxYear2023Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ggb_IfrsTaxPeriodAxis=ggb_IfrsTaxYear2024Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ggb_IfrsTaxPeriodAxis=ggb_TaxYear2025Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ggb_IfrsTaxPeriodAxis=ggb_TaxYear2026AndLaterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |