XML 145 R123.htm IDEA: XBRL DOCUMENT
v3.23.1

TAX, CIVIL AND LABOR CLAIMS AND CONTINGENT ASSETS - Civil and Labor Contingencies (Details) R$ in Thousands | Oct. 08, 2019 item | Aug. 01, 2013 BRL (R$) | Sep. 23, 2005 BRL (R$) item | Dec. 31, 2022 BRL (R$)
--- | --- | --- | --- | ---
TAX, CIVIL AND LABOR CLAIMS AND CONTINGENT ASSETS |  |  |  |
Number of lawsuits that challenged the investigation | item | 2 |  |  |
Civil contingencies | Antitrust Legislation |  |  |  |
TAX, CIVIL AND LABOR CLAIMS AND CONTINGENT ASSETS |  |  |  |
Number of civil construction unions | item |  |  | 2 |
Fine for existence of cartel on gross revenues (in percentage) |  |  | 7.00% |
Fine for existence of cartel |  |  | R$ 245,070 |
Fine for existence of cartel updated by judicial accounting |  | R$ 417,820 |  |
Civil contingencies | Other Demands Of a Civil Nature |  |  |  |
TAX, CIVIL AND LABOR CLAIMS AND CONTINGENT ASSETS |  |  |  |
Estimated financial effect of contingent liabilities |  |  |  | R$ 552,515
Labor Contingencies |  |  |  |
TAX, CIVIL AND LABOR CLAIMS AND CONTINGENT ASSETS |  |  |  |
Estimated financial effect of contingent liabilities |  |  |  | R$ 820,032

X
- Definition The fine for existence of cartel. + References No definition available. + Details
Name: | ggb_FineForExistenceOfCartel
Namespace Prefix: | ggb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The fine levied on the company and other long steel producers as a percentage of gross revenues in the year before administrative proceedings was commenced. + References No definition available. + Details
Name: | ggb_FineForExistenceOfCartelOnGrossRevenues
Namespace Prefix: | ggb_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The fine for existence of cartel updated by judicial accounting. + References No definition available. + Details
Name: | ggb_FineForExistenceOfCartelUpdatedByJudicialAccounting
Namespace Prefix: | ggb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition It represents the number of civil construction unions. + References No definition available. + Details
Name: | ggb_NumberOfCivilConstructionUnions
Namespace Prefix: | ggb_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of lawsuits that challenged the investigation. + References No definition available. + Details
Name: | ggb_NumberOfLawsuitsChallengedInvestigation
Namespace Prefix: | ggb_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfContingentLiabilitiesLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of the estimated financial effect of contingent liabilities. [Refer: Contingent liabilities [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2022-03-24 -Paragraph 86 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2022-en-r&anchor=para_86_a&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_EstimatedFinancialEffectOfContingentLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | ifrs-full_ClassesOfContingentLiabilitiesAxis=ifrs-full_LegalProceedingsContingentLiabilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=ggb_AntitrustLegislationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=ggb_OtherDemandsOfCivilNatureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfContingentLiabilitiesAxis=ggb_LaborContingenciesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |