XML 74 R104.htm IDEA: XBRL DOCUMENT v3.20.1

LOANS AND FINANCING - Amortization Schedule (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Amortization schedules of long term loans and financing
Long-term debt	R$ 11,594,612	R$ 11,545,658
Next 12 months
Amortization schedules of long term loans and financing
Long-term debt		2,253,958
Year Two
Amortization schedules of long term loans and financing
Long-term debt	1,221,361	1,199,045
Year Three
Amortization schedules of long term loans and financing
Long-term debt	105,137	121,490
Year Four
Amortization schedules of long term loans and financing
Long-term debt	1,243,774	1,209,109
Year Five
Amortization schedules of long term loans and financing
Long-term debt	1,531,163	2,426,456
More than 5 years
Amortization schedules of long term loans and financing
Long-term debt	R$ 7,493,177	R$ 4,335,600

X

- Definition

Total non-current portion of non-current borrowings, excluding notes and debentures.

+ References

No definition available.

+ Details

Name:	ggb_LongTermBorrowingsExcludingNotesAndDebentures
Namespace Prefix:	ggb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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_DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_NotLaterThanOneYearMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanFiveYearsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: