v3.26.1
Cover
 12 Months Ended
Dec. 31, 2025
shares
Document Information [Line Items]  
Document Type 20-F
Document Registration Statement false
Document Annual Report true
Current Fiscal Year End Date --12-31
Document Period End Date Dec. 31, 2025
Document Transition Report false
Document Shell Company Report false
Entity File Number 001-42804
Entity Registrant Name Kyivstar Group Ltd.
Entity Incorporation, State or Country Code D0
Entity Address, Address Line One Unit 517, Level 5
Entity Address, Address Line Two Index Tower
Entity Address, City or Town Dubai International Financial Centre (DIFC)
Entity Address, Country AE
Entity Common Stock, Shares Outstanding (in shares) 230,863,624
Entity Well-known Seasoned Issuer No
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Non-accelerated Filer
Entity Emerging Growth Company true
Entity Ex Transition Period false
ICFR Auditor Attestation Flag false
Document Financial Statement Error Correction [Flag] false
Document Accounting Standard International Financial Reporting Standards
Entity Shell Company false
Central Index Key 0002062440
Document Fiscal Year Focus 2025
Document Fiscal Period Focus FY
Amendment Flag false
Business Contact  
Document Information [Line Items]  
Entity Address, Address Line One Unit 517, Level 5
Entity Address, Address Line Two Index Tower
Entity Address, City or Town Dubai International Financial Centre (DIFC)
Entity Address, Country AE
Contact Personnel Name Kaan Terzioğlu
City Area Code 971
Local Phone Number 52 138 1275
Common shares  
Document Information [Line Items]  
Title of 12(b) Security Common Shares, par value US$0.01 per share
Trading Symbol KYIV
Security Exchange Name NASDAQ
Warrants  
Document Information [Line Items]  
Title of 12(b) Security Warrants, each whole warrant exercisable for one common share at an exercise price of $11.50
Trading Symbol KYIVW
Security Exchange Name NASDAQ