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SIGNIFICANT TRANSACTIONS - Narrative (Details) $ in Millions |  |  |  |  | 1 Months Ended | 3 Months Ended | 4 Months Ended | 5 Months Ended | 6 Months Ended | 9 Months Ended |  |  |  |
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May 26, 2026 USD ($) solarPowerPlant MW | Feb. 26, 2026 USD ($) | Feb. 10, 2026 USD ($) | Apr. 02, 2025 USD ($) | Jun. 30, 2026 USD ($) | Jun. 30, 2025 USD ($) | Jun. 30, 2026 USD ($) | Jun. 30, 2026 USD ($) | Jun. 30, 2026 USD ($) | Jun. 30, 2025 USD ($) | Dec. 31, 2025 USD ($) | Jun. 05, 2026 USD ($) | Feb. 09, 2026 USD ($) | Dec. 15, 2025 USD ($) | Mar. 19, 2025 USD ($)
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  | $ 53 | $ 1 |  |  |  |  |
Goodwill |  |  |  |  | $ 221 |  | $ 221 | $ 221 | 221 |  | $ 128 |  |  |  |
Tabletki Group |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of voting equity interests acquired |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |
Purchase consideration |  |  | $ 161 |  |  |  |  |  |  |  |  |  |  |  |
LLC ISP Shtorm |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of voting equity interests acquired |  | 100.00% |  |  |  |  |  |  |  |  |  |  | 100.00% |  |
Purchase consideration |  | $ 10 |  |  |  |  |  |  |  |  |  |  | $ 10 |  |
Acquisitions |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |
Six solar power plants |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  | 49 |  |  |  |  |  |
SUNVIN 11 LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |
Uklon |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of voting equity interests acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 97.00%
Purchase consideration |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 158
Acquisitions |  |  |  |  |  |  |  |  |  | 1 |  |  |  |  |
JSC Kyivstar | Tabletki Group |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of voting equity interests acquired |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |
Purchase consideration |  |  | $ 161 |  |  |  |  |  |  |  |  |  |  |  |
Customer-related intangible assets recognised as of acquisition date |  |  | 61 |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  |  | 79 |  |  |  |  |  |  |  |  |  |  |  |
Other current assets |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |
Revenue of acquiree since acquisition date |  |  |  |  |  |  |  | 13 |  |  |  |  |  |  |
Profit (loss) of acquiree since acquisition date |  |  |  |  |  |  |  | 8 |  |  |  |  |  |  |
Revenue of combined entity as if combination occurred at beginning of period |  |  |  |  |  |  |  |  | 16 |  |  |  |  |  |
Profit (loss) of combined entity as if combination occurred at beginning of period |  |  |  |  |  |  |  |  | 10 |  |  |  |  |  |
Acquisition-related costs recognised as expense for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |
Goodwill resulting from acquisition |  |  | $ 79 |  |  |  |  |  |  |  |  |  |  |  |
JSC Kyivstar | Tabletki Group | Purchase Consideration |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement period adjustment |  |  |  |  |  |  |  |  | 1 |  |  |  |  |  |
JSC Kyivstar | Tabletki Group | Software | Internally generated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement period adjustment |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |
JSC Kyivstar | Tabletki Group | Customer relationship |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life measured as period of time, intangible assets other than goodwill |  |  | 12 years |  |  |  |  |  |  |  |  |  |  |  |
JSC Kyivstar | Tabletki Group | Brands and trademarks |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life measured as period of time, intangible assets other than goodwill |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  |  | $ 12 |  |  |  |  |  |  |  |  |  |  |  |
JSC Kyivstar | Tabletki Group | Software |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life measured as period of time, intangible assets other than goodwill |  |  | 7 years |  |  |  |  |  |  |  |  |  |  |  |
Technology-based intangible assets recognised as of acquisition date |  |  | $ 6 |  |  |  |  |  |  |  |  |  |  |  |
JSC Kyivstar | LLC ISP Shtorm |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of voting equity interests acquired |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase consideration |  | $ 10 |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life measured as period of time, intangible assets other than goodwill |  | 6 years |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  | $ 3 |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue of combined entity as if combination occurred at beginning of period |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |
Less: deferred consideration |  | 3 |  |  |  |  |  |  | 3 |  |  |  |  |  |
Property and equipment |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred tax liability |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill resulting from acquisition |  | $ 6 |  |  |  |  |  |  |  |  |  |  |  |  |
JSC Kyivstar | LLC ISP Shtorm | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue of acquiree since acquisition date |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  |
JSC Kyivstar | Six solar power plants |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of voting equity interests acquired | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase consideration | $ 70 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life measured as period of time, intangible assets other than goodwill | 4 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets | $ 11 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Technology-based intangible assets recognised as of acquisition date | 11 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue of acquiree since acquisition date |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |
Profit (loss) of acquiree since acquisition date |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  |
Revenue of combined entity as if combination occurred at beginning of period |  |  |  |  |  |  |  |  | 9 |  |  |  |  |  |
Profit (loss) of combined entity as if combination occurred at beginning of period |  |  |  |  |  |  |  |  | 4 |  |  |  |  |  |
Acquisition-related costs recognised as expense for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination | $ 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of solar power plants acquired | solarPowerPlant | 6 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Combined installed generation capacity (MW) | MW | 105 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life measured as period of time, property, plant and equipment | 17 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property and equipment | $ 49 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trade and other receivables | 6 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current liabilities | 11 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred tax asset | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred tax liability | 8 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill resulting from acquisition | 19 |  |  |  |  |  |  |  |  |  |  |  |  |  |
JSC Kyivstar | Six solar power plants | Property, plant and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value gain (loss) recognised as of acquisition date | 31 |  |  |  |  |  |  |  |  |  |  |  |  |  |
JSC Kyivstar | Six solar power plants | Interest-free loan payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current liabilities | $ 11 |  |  |  |  |  |  |  |  |  |  |  |  |  |
JSC Kyivstar | SUNVIN 11 LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill resulting from acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 7 |
Goodwill |  |  |  |  | $ 4 |  | $ 4 | $ 4 | 4 |  |  |  |  |  |
JSC Kyivstar | SUNVIN 11 LLC | Property, plant and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement period adjustment |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |
JSC Kyivstar | SUNVIN 11 LLC | Intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement period adjustment |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |
JSC Kyivstar | SUNVIN 11 LLC | Deferred tax liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement period adjustment |  |  |  |  |  |  |  |  | (1) |  |  |  |  |  |
JSC Kyivstar | Uklon |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of voting equity interests acquired |  |  |  | 97.00% |  |  |  |  |  |  |  |  |  |  | 97.00%
Purchase consideration |  |  |  | $ 158 |  |  |  |  |  |  |  |  |  |  | $ 158
Customer-related intangible assets recognised as of acquisition date |  |  |  | 32 |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  |  |  | 58 |  |  |  |  |  |  |  |  |  |  |
Technology-based intangible assets recognised as of acquisition date |  |  |  | 8 |  |  |  |  |  |  |  |  |  |  |
Revenue of acquiree since acquisition date |  |  |  |  |  | $ 22 |  |  |  |  |  |  |  |  |
Profit (loss) of acquiree since acquisition date |  |  |  |  |  | $ 6 |  |  |  |  |  |  |  |  |
Revenue of combined entity as if combination occurred at beginning of period |  |  |  |  |  |  |  |  |  | 41 |  |  |  |  |
Profit (loss) of combined entity as if combination occurred at beginning of period |  |  |  |  |  |  |  |  |  | 10 |  |  |  |  |
Acquisition-related costs recognised as expense for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination |  |  |  |  |  |  |  |  |  | $ 1 |  |  |  |  |
Trade and other receivables |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |
Deferred tax liability |  |  |  | 7 |  |  |  |  |  |  |  |  |  |  |
Goodwill resulting from acquisition |  |  |  | 109 |  |  |  |  |  |  |  |  |  |  |
Fair value of contingent consideration |  |  |  | $ 16 |  |  |  |  |  |  |  |  |  |  |
Equity interest acquired |  |  |  | 3.00% |  |  |  |  |  |  |  |  |  |  |
Non-controlling interests |  |  |  | $ 0 |  |  |  |  |  |  |  |  |  |  |
JSC Kyivstar | Uklon | Contingent consideration other than employee bonuses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of contingent consideration |  |  |  | 12 |  |  |  |  |  |  |  |  |  |  |
Settled liabilities, contingent liabilities recognised in business combination |  |  |  |  |  |  |  |  |  |  | $ 2 |  |  |  |
JSC Kyivstar | Uklon | Contingent consideration other than employee bonuses | Share Purchase Agreement ("SPA") |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of contingent consideration |  |  |  | $ 10 |  |  |  |  |  |  |  |  |  |  |
JSC Kyivstar | Uklon | Employee bonuses for pre-acquisition service |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Settled liabilities, contingent liabilities recognised in business combination |  |  |  |  |  |  |  |  | $ 4 |  |  |  |  |  |
JSC Kyivstar | Uklon | Customer relationship |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life measured as period of time, intangible assets other than goodwill |  |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |
JSC Kyivstar | Uklon | Trademark |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life measured as period of time, intangible assets other than goodwill |  |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  |  |  | $ 18 |  |  |  |  |  |  |  |  |  |  |
JSC Kyivstar | Uklon | Technology-based intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life measured as period of time, intangible assets other than goodwill |  |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |
Uklon | E-wings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of voting equity interests acquired |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |
Purchase consideration |  |  |  |  |  |  |  |  |  |  |  | $ 2 |  |  |

X
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- Definition The increase in property, plant and equipment including right-of-use assets resulting from acquisitions through business combinations. [Refer: Total for all business combinations [member]; Property, plant and equipment including right-of-use assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 16 -IssueDate 2025-01-01 -Paragraph 73 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2025-en-r&anchor=para_73_e&doctype=Standard -URIDate 2025-03-27 + Details
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- Definition The amount, at acquisition date, of contingent consideration arrangements recognised as consideration transferred in a business combination. [Refer: Total for all business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2025-01-01 -Paragraph B64 -Subparagraph g -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2025-en-r&anchor=para_B64_g_i&doctype=Appendix&subtype=B -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 35 -Subparagraph f -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_35_f_i&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 35 -Subparagraph f -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_35_f_i&doctype=Standard -URIDate 2025-03-27 + Details
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