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GENERAL INFORMATION - Basis of Consolidation, Narrative (Details) $ in Millions | May 26, 2026 USD ($) solarPowerPlant MW | Feb. 26, 2026 USD ($) | Feb. 10, 2026 USD ($) | Feb. 09, 2026 USD ($)
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Tabletki Group |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Percentage of voting equity interests acquired |  |  | 100.00% |
Purchase consideration |  |  | $ 161 |
Tabletki Group | JSC Kyivstar |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Percentage of voting equity interests acquired |  |  | 100.00% |
Purchase consideration |  |  | $ 161 |
LLC ISP Shtorm |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Percentage of voting equity interests acquired |  | 100.00% |  | 100.00%
Purchase consideration |  | $ 10 |  | $ 10
LLC ISP Shtorm | JSC Kyivstar |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Percentage of voting equity interests acquired |  | 100.00% |  |
Purchase consideration |  | $ 10 |  |
Six solar power plants | JSC Kyivstar |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Percentage of voting equity interests acquired | 100.00% |  |  |
Purchase consideration | $ 70 |  |  |
Number of solar power plants acquired | solarPowerPlant | 6 |  |  |
Combined installed generation capacity (MW) | MW | 105 |  |  |

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