XML 180 R158.htm IDEA: XBRL DOCUMENT
v3.23.1

EQUITY - Capital increase (Details) R$ in Thousands | Feb. 28, 2023 BRL (R$) shares
--- | ---
EQUITY |
Ratio of capital increase bonus issued | 0.05
Common shares |
EQUITY |
Number of new shares issued | 28,596,497
Preferred shares |
EQUITY |
Number of new shares issued | 55,073,363
Investments and working capital reserve |
EQUITY |
Value of new shares issued | R$ | R$ 966,162

X
- Definition Number of new stock issued during the period. + References No definition available. + Details
Name: | ggb_IfrsStockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | ggb_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering. + References No definition available. + Details
Name: | ggb_IfrsStockIssuedDuringPeriodValueNewIssues
Namespace Prefix: | ggb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Ratio applied to capital increase bonus issued. + References No definition available. + Details
Name: | ggb_SharesIssuedBonusIssuanceRatio
Namespace Prefix: | ggb_
Data Type: | xbrli:pureItemType
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_DisclosureOfClassesOfShareCapitalLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_ClassesOfShareCapitalAxis=ifrs-full_OrdinarySharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfShareCapitalAxis=ifrs-full_PreferenceSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ComponentsOfEquityAxis=ggb_InvestmentsAndWorkingCapitalReserveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |