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INTANGIBLE ASSETS AND GOODWILL - Schedule of Intangible Assets (Details) - USD ($) $ in Millions | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | May 26, 2026 | Feb. 26, 2026 | Feb. 10, 2026 | Apr. 02, 2025
Reconciliation of changes in intangible assets and goodwill [abstract] |  |  |  |  |  |
Balance as of January 1 | $ 491 | $ 297 |  |  |  |
Acquisitions | 199 | 167 |  |  |  |
Additions | 47 | 34 |  |  |  |
Measurement period adjustment | (3) | 0 |  |  |  |
Transfer and reclassification | 0 | 2 |  |  |  |
Amortization | (44) | (29) |  |  |  |
Translation adjustment | (30) | 5 |  |  |  |
Balance as of June 30 | 660 | 476 |  |  |  |
Kyivstar |  |  |  |  |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |  |  |  |  |
Additional recognition, goodwill | 104 |  |  |  |  |
Uklon |  |  |  |  |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |  |  |  |  |
Additional recognition, goodwill |  | $ 109 |  |  |  |
Tabletki Group | JSC Kyivstar |  |  |  |  |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |  |  |  |  |
Customer-related intangible assets recognised as of acquisition date |  |  |  |  | $ 61 |
Intangible assets |  |  |  |  | 79 |
Tabletki Group | Brands and trademarks | JSC Kyivstar |  |  |  |  |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |  |  |  |  |
Intangible assets |  |  |  |  | 12 |
Tabletki Group | Software | JSC Kyivstar |  |  |  |  |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |  |  |  |  |
Technology-based intangible assets recognised as of acquisition date |  |  |  |  | $ 6 |
LLC ISP Shtorm | JSC Kyivstar |  |  |  |  |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |  |  |  |  |
Intangible assets |  |  |  | $ 3 |  |
Six solar power plants | JSC Kyivstar |  |  |  |  |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |  |  |  |  |
Intangible assets |  |  | $ 11 |  |  |
Technology-based intangible assets recognised as of acquisition date |  |  | $ 11 |  |  |
SUNVIN 11 LLC | JSC Kyivstar | Intangible assets |  |  |  |  |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |  |  |  |  |
Measurement period adjustment | $ 2 |  |  |  |  |
Uklon | JSC Kyivstar |  |  |  |  |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |  |  |  |  |
Customer-related intangible assets recognised as of acquisition date |  |  |  |  |  | $ 32
Intangible assets |  |  |  |  |  | 58
Technology-based intangible assets recognised as of acquisition date |  |  |  |  |  | 8
Uklon | Trademark | JSC Kyivstar |  |  |  |  |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |  |  |  |  |
Intangible assets |  |  |  |  |  | $ 18

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