XML 81 R56.htm IDEA: XBRL DOCUMENT
v3.22.1

ENVIRONMENTAL LIABILITIES (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2021
ENVIRONMENTAL LIABILITIES |
Schedule of provision for environmental liabilities | ​
​ | ​ | ​ | ​ | ​
​ |  | 2021 |  | 2020
Provision for environmental liabilities |  | 575,709 | ​ | 297,094
Current |  | 231,711 | ​ | 125,992
Non-current |  | 343,998 | ​ | 171,102

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

X
- Definition The disclosure of detailed information provisions regarding to environmental liabilities. + References No definition available. + Details
Name: | ggb_DisclosureOfEnvironmentalLiabilitiesTableTextBlock
Namespace Prefix: | ggb_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration