XML 141 R117.htm IDEA: XBRL DOCUMENT
v3.20.1

FINANCIAL INSTRUMENTS - Changes in liabilities from Cash Flow from financing activities (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Related parties, net |  |  |
Changes in liabilities from Cash flow from financing activities |  |  |
Beginning of year | R$ (26,589) | R$ (51,839) | R$ (57,541)
Cash transactions |  |  |
Proceeds/(Repayment) from financing activities | (64,089) | 25,755 | 5,797
Non cash transactions |  |  |
Interest expense on loans and Interest on loans with related parties | (4,767) | (545) | (95)
Exchange variation, operations with subsidiaries and associate company and others |  | 40 |
End of year | (95,445) | (26,589) | (51,839)
Debt, Debentures and Losses/Gains on financial instruments, net - Derivative instruments |  |  |
Changes in liabilities from Cash flow from financing activities |  |  |
Beginning of year | 14,878,542 | 16,510,851 | 20,576,866
Cash transactions |  |  |
Proceeds/(Repayment) from financing activities | 700,490 | (3,439,644) | (3,975,541)
Interest paid on loans and financing | (945,027) | (1,162,364) | (1,330,116)
Non cash transactions |  |  |
Interest expense on loans and Interest on loans with related parties | 938,120 | 1,177,686 | 1,323,448
Exchange variation, operations with subsidiaries and associate company and others | 474,896 | 1,792,013 | (83,806)
End of year | R$ 16,047,021 | R$ 14,878,542 | R$ 16,510,851

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

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

X
- Definition The decrease in liabilities arising from financing activities resulting from the payment of interest on loans and financing. + References No definition available. + Details
Name: | ggb_DecreaseThroughInterestPaidOnLoansAndFinancing
Namespace Prefix: | ggb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The increase liabilities arising from financing activities resulting from interest incurred but not yet paid. + References No definition available. + Details
Name: | ggb_IncreaseThroughInterestExpenseIncurredButNotYetPaid
Namespace Prefix: | ggb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- 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_DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The increase (decrease) in liabilities arising from financing activities resulting from the effect of changes in foreign exchange rates. [Refer: Liabilities arising from financing activities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2019-01-01 -Paragraph 44B -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2019-en-r&anchor=para_44B_c&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_IncreaseDecreaseThroughEffectOfChangesInForeignExchangeRatesLiabilitiesArisingFromFinancingActivities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The increase (decrease) in liabilities arising from financing activities resulting from financing cash flows. [Refer: Cash flows from (used in) financing activities; Liabilities arising from financing activities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2019-01-01 -Paragraph 44B -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2019-en-r&anchor=para_44B_a&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_IncreaseDecreaseThroughFinancingCashFlowsLiabilitiesArisingFromFinancingActivities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of liabilities for which cash flows were, or future cash flows will be, classified in the statement of cash flows as cash flows from financing activities. [Refer: Cash flows from (used in) financing activities; Liabilities] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2019-01-01 -Paragraph 44D -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2019-en-r&anchor=para_44D&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_LiabilitiesArisingFromFinancingActivities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis=ifrs-full_AssetsHeldToHedgeLiabilitiesArisingFromFinancingActivitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis=ggb_DebtDebenturesAndLossesGainsOnFinancialInstrumentsNetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |