XML 158 R99.htm IDEA: XBRL DOCUMENT
v3.23.1

INVENTORIES (Details 1) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Inventories Abstract |  |
Opening balance | R$ (98,730) | R$ (109,038)
Reversal of inventories with low turnover and obsolescence | 3,621 | 10,308
Consolidation in the acquisition of companies | (1,384) |
Closing balance | R$ (96,493) | R$ (98,730)

X
- References No definition available. + Details
Name: | sid_ConsolidationInAcquisitionOfInventoryCompanies
Namespace Prefix: | sid_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | sid_InventoriesAbstract
Namespace Prefix: | sid_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | sid_InventoryNetOne
Namespace Prefix: | sid_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount recognised as a reduction in the amount of inventories recognised as an expense due to the reversal low turnover and obsolescence. + References No definition available. + Details
Name: | sid_ReversalOfInventoryWriteDownWithLowTurnoverAndObsolescence
Namespace Prefix: | sid_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration