XML 153 R142.htm IDEA: XBRL DOCUMENT v3.19.1

20. SHAREHOLDERS' EQUITY (Details) - shares	Dec. 31, 2018	Dec. 31, 2017
Number of common shares outstanding	1,387,524,047	1,387,524,047
Percent of total shares	100.00%	100.00%
USIM3
Number of common shares outstanding	1,380,114,547
Percent of total shares	99.47%
Percent of voting capital	100.00%
Treasury shares
Number of common shares outstanding	7,409,500	30,391,000
Percent of total shares	0.53%	2.19%
Common
Number of common shares outstanding		1,357,133,047
Percent of total shares		97.81%
Percent of voting capital		100.00%
Vicunha Acos S.A.
Number of common shares outstanding	679,522,254	682,855,454
Percent of total shares	48.97%	49.21%
Percent of voting capital	49.24%	50.32%
Rio Iaco Participacoes S.A.
Number of common shares outstanding	58,193,503	58,193,503
Percent of total shares	4.19%	4.19%
Percent of voting capital	4.22%	4.29%
NYSE (ADRs)
Number of common shares outstanding	284,152,319	303,590,364
Percent of total shares	20.48%	21.88%
Percent of voting capital	20.59%	22.37%
Other
Number of common shares outstanding	358,246,471	312,493,726
Percent of total shares	25.82%	22.52%
Percent of voting capital	25.95%	23.02%

X

- References

No definition available.

+ Details

Name:	SID_PercentageOfShares
Namespace Prefix:	SID_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The number of shares that have been authorised and issued, reduced by treasury shares held. [Refer: Treasury shares]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 79
-Subparagraph a
-Clause iv
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_79_a_iv&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_NumberOfSharesOutstanding
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The percentage of voting equity interests acquired in a business combination. [Refer: Business combinations [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2018-01-01
-Paragraph B64
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2018-03-01&anchor=para_B64_c&doctype=Appendix&seq=2
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_PercentageOfVotingEquityInterestsAcquired
Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	ifrs-full_ComponentsOfEquityAxis=SID_USIM3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ComponentsOfEquityAxis=ifrs-full_TreasurySharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ComponentsOfEquityAxis=SID_CommonStocksMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=SID_VicunhaAcosSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=SID_RioLacoParticipacoesSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=SID_NyseAdrsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=SID_OtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: