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CONDENSED SEPARATE FINANCIAL INFORMATION OF KYIVSTAR GROUP LTD. - Narrative (Details)
12 Months Ended
Dec. 31, 2025
Condensed Financial Statements, Captions [Line Items]  
Percentage of restricted net assets of consolidated net assets 25.00%
Kyivstar Group Ltd.  
Condensed Financial Statements, Captions [Line Items]  
Restricted net assets of consolidated subsidiaries as percentage of consolidated net assets 104.00%