0001213900-26-035734 | POS AM | XBRL Viewer

GENERAL INFORMATION - Disclosure of Interests in Subsidiaries (Parentheticals) (Details)	12 Months Ended
	Dec. 31, 2024
Disclosure of interests in subsidiaries [Line Items]
Subsidiary rate	100.00%

CONDENSED SEPARATE FINANCIAL INFORMATION OF KYIVSTAR GROUP LTD. (Tables)

12 Months Ended

Dec. 31, 2025

Condensed Financial Information Disclosure [Abstract]

Condensed Statement of Financial Position

Condensed statement of financial position:

As of December 31:

		2025
Non-current assets
Financial fixed assets		2,351
Total non-current assets		2,351
Total current assets		18
Total assets		2,369
Equity		2,256
Total liabilities		113
Total equity and liabilities		2,369

Condensed Income Statement

Condensed income statement:

for the years ended December 31:

	2025
Other operating gains	(1	)
Listing expense	(162	)
Operating (loss)	(163	)
Finance costs	(5	)
Profit/(loss) for the year	(168	)

Condensed Statements of Comprehensive Income

Condensed statements of comprehensive income:

for the years ended December 31:

	2025
Profit (loss) for the year	(168	)
Total comprehensive (loss) for the year, net of tax	(168	)

Condensed Statement of Cash Flows

Condensed statement of cash flows:

for the years ended December 31:

	2025
Financing activities
Repayment of Loan Note Payable	(123	)
Proceeds from SPAC Merger, net of transaction costs	132
Net cash flows generated from financing activities	9
Net increase in cash and cash equivalents	9
Cash and cash equivalents at end of period	9

INCOME TAXES - Schedule of Tax Losses Year of Expiration (Details) $ in Millions	Dec. 31, 2024 USD ($)
Tax losses expiry
Recognized losses	$ (1)
Recognized credits	$ 0

OTHER NON-OPERATING GAIN/(LOSS), NET - Schedule of Other Non-Operating Gain/ (loss), Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Other Non-Operating Gain/(Loss), Net [Abstract]
Change in fair value of warrants	$ (1)
Change in fair value of put option liability	(2)	3	(3)
Income from sale of scrap metal			2
(Loss)/gain on foreign currency purchase and sale, net	(3)		(7)
Insurance compensation	5
Other loss		(1)
Other non-operating (loss)/gain, net		$ 2	$ (8)

RELATED PARTIES - Schedule of Transactions and balances with related parties (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
RELATED PARTIES - Schedule of Transactions and balances with related parties (Details) [Line Items]
Total	$ (10)	$ (8)	$ (7)

Label

Element

Value

Cost Of Services Equipment And Accessories

kyiv_CostOfServicesEquipmentAndAccessories

$ 123,000,000

Cost Of Services Equipment And Accessories

kyiv_CostOfServicesEquipmentAndAccessories

100,000,000

Cost Of Services Equipment And Accessories

kyiv_CostOfServicesEquipmentAndAccessories

94,000,000

Current Financial Assets Investments And Derivatives

kyiv_CurrentFinancialAssetsInvestmentsAndDerivatives

119,000,000

Current Financial Assets Investments And Derivatives

kyiv_CurrentFinancialAssetsInvestmentsAndDerivatives

$ 94,000,000

^[1]

Increase Decrease In Retroactive Effect Of Capital Reorganization

kyiv_IncreaseDecreaseInRetroactiveEffectOfCapitalReorganization

206,942,440

Increase Decrease In Retroactive Effect Of Capital Reorganization

kyiv_IncreaseDecreaseInRetroactiveEffectOfCapitalReorganization

206,942,440

Increase Decrease In Retroactive Effect Of Capital Reorganization

kyiv_IncreaseDecreaseInRetroactiveEffectOfCapitalReorganization

206,942,440

Increase Decrease Through Retroactive Effect Of Capital Reorganization