XML 20 R1.htm IDEA: XBRL DOCUMENT v3.21.1
Cover
 12 Months Ended
Dec. 31, 2020
shares
Cover [Abstract]  
Entity Registrant Name NATIONAL STEEL CO
Entity Central Index Key 0001049659
Document Type 20-F
Document Period End Date Dec. 31, 2020
Amendment Flag false
Current Fiscal Year End Date --12-31
Trading Symbol SID
Title of 12(g) Security Common Shares without Par Value
Entity Interactive Data Current Yes
Entity Incorporation, State or Country Code D5
Entity a Well-known Seasoned Issuer No
Entity a Voluntary Filer No
Entity Reporting Status Current Yes
Entity Filer Category Large Accelerated Filer
Entity Emerging Growth Company false
Entity Shell Company false
Document Annual Report true
ICFR Auditor Attestation Flag true
Document Shell Company Report false
Document Transition Report false
Entity Common Stock, Shares Outstanding 1,387,524,047
Document Fiscal Period Focus FY
Document Fiscal Year Focus 2020