v3.26.1
Document and Entity Information
 12 Months Ended
Dec. 31, 2025
shares
Document Information [Line Items]  
Document Type 20-F/A
Document Registration Statement false
Document Annual Report true
Document Period End Date Dec. 31, 2025
Document Transition Report false
Document Shell Company Report false
Entity File Number 001-35173
Entity Registrant Name NEBIUS GROUP N.V.
Entity Address, Country NL
Entity Address, Address Line One Schiphol Boulevard 165
Entity Address, Address Line Two Schiphol P7
Entity Address, City or Town BG
Entity Incorporation, State or Country Code P7
Entity Address, Postal Zip Code 1118
Title of 12(b) Security Class A Ordinary Shares
Trading Symbol NBIS
Security Exchange Name NASDAQ
Entity Well-known Seasoned Issuer Yes
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Large Accelerated Filer
Entity Emerging Growth Company false
ICFR Auditor Attestation Flag true
Document Financial Statement Error Correction [Flag] false
Document Accounting Standard U.S. GAAP
Entity Shell Company false
Auditor Name Reanda Audit & Assurance B.V.
Auditor Firm ID 7018
Auditor Location Netherlands
Entity Central Index Key 0001513845
Current Fiscal Year End Date --12-31
Document Fiscal Year Focus 2025
Document Fiscal Period Focus FY
Amendment Flag false
Business Contact [Member]  
Document Information [Line Items]  
Entity Address, Country NL
Entity Address, Address Line One Schiphol Boulevard 165
Entity Address, Address Line Two Schiphol
Entity Address, City or Town BG
Entity Address, Postal Zip Code 1118
Contact Personnel Name General Counsel
Contact Personnel Email Address askIR@nebius.com
Common Class A  
Document Information [Line Items]  
Entity Common Stock, Shares Outstanding 219,465,088
Common Class B  
Document Information [Line Items]  
Entity Common Stock, Shares Outstanding 33,551,883