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ACQUISITION OF BUSINESSES - Additional Information (Details) - USD ($) $ in Millions |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Sep. 03, 2025 | Jul. 31, 2025 | Apr. 29, 2025 | Dec. 31, 2025 | Jan. 01, 2026
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Property, plant and equipment |  |  |  |  | $ 1,100
Business acquisition, proforma revenue |  |  |  | $ 1,700 |
Business acquisition, proforma income |  |  |  | $ 100 |
U.S. bulk fiber network |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Total consideration | $ 808 |  |  |  |
Percentage of voting equity interests acquired | 20.00% |  |  |  |
Acquisition-related costs recognised as expense for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination | $ 14 |  |  |  |
Property, plant and equipment | 2,657 |  |  |  |
Intangible assets | $ 1,673 |  |  |  |
Useful life measured as period of time, intangible assets other than goodwill | 25 years |  |  |  |
Cash | $ 808 |  |  |  |
U.S. bulk fiber network | Hotwire Consortium |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Total consideration | $ 3,900 |  |  |  |
U.S. Refined Products Pipeline System |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Total consideration |  | $ 920 |  |  |
Percentage of voting equity interests acquired |  | 15.00% |  |  |
Acquisition-related costs recognised as expense for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination |  | $ 43 |  |  |
Property, plant and equipment |  | 8,898 |  |  |
Equity funded consideration |  | 500 |  |  |
Cash |  | 920 |  |  |
U.S. Refined Products Pipeline System | Colonial Consortium |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Total consideration |  | 6,200 |  |  |
Equity funded consideration |  | $ 3,400 |  |  |
Brazilian electricity transmission operation |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Total consideration |  |  | $ 179 |  |
Percentage of voting equity interests acquired |  |  | 15.00% |  |
Intangible assets |  |  | $ 1,330 |  |
Cash |  |  | $ 45 |  |
Proportion of ownership interest in subsidiary |  |  | 31.00% |  |
Brazilian electricity transmission operation | Mantiqueira Consortium |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Total consideration |  |  | $ 145 |  |
Proportion of ownership interest in subsidiary |  |  | 100.00% |  |

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