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RELATED PARTY TRANSACTIONS (Details) - USD ($) $ in Millions |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2026 | Oct. 01, 2025 | Jun. 30, 2026 | Sep. 30, 2025 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025 | Dec. 31, 2025 | May 07, 2026
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |  |  |
Directors' remuneration expense (less than) |  |  | $ 1 |  | $ 1 | $ 1 | $ 1 |  |
Property, plant and equipment | $ 63,692 |  | 63,692 |  |  | 63,692 |  | $ 66,797 |
Intangible assets | 14,692 |  | 14,692 |  |  | 14,692 |  | 15,765 |
Goodwill | $ 17,632 |  | 17,632 |  |  | 17,632 |  | $ 19,210 |
Income tax credits |  |  |  |  |  | 46 |  |  |
European Hyperscale Data Center |  |  |  |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |  |  |
Proportion of ownership interest in associate |  |  |  | 90.00% |  |  |  |  |
Proceeds from sales of interests in associates |  |  |  | $ 310 |  |  |  |  |
Gains recognised when control of subsidiary is lost |  |  |  | 25 |  |  |  |  |
Global intermodal logistics operation |  |  |  |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |  |  |
Proportion of ownership interest in associate |  |  |  |  |  |  |  | 66.00% |
Gains recognised when control of subsidiary is lost |  |  |  | 30 |  |  |  |  |
U.S. bulk fiber network |  |  |  |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |  |  |
Proportion of ownership interest in associate | 80.00% |  |  |  |  |  |  |  |
Proceeds from sales of interests in associates | $ 300 |  |  |  |  |  |  |  |
Revolving credit facility with brookfield |  |  |  |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |  |  |
Credit facility, maximum borrowing capacity | 1,000 |  | 1,000 |  |  | 1,000 |  |  |
Subsidiary and corporate borrowings | 0 |  | 0 |  |  | $ 0 |  | $ 0 |
Service provider |  |  |  |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |  |  |
Asset management fee as percent per quarter |  |  |  |  |  | 0.3125% |  |  |
Asset management fee, percent |  |  |  |  |  | 1.25% |  |  |
Revenue from sale of goods, related party transactions |  |  | 111 |  | 105 | $ 217 | 199 |  |
Amounts payable, related party transactions | 110 |  | 110 |  |  | 110 |  | 109 |
Revenue from sale of goods, related party transactions |  |  | 1 |  | 1 | 2 | 2 |  |
Related party expenses |  |  | 10 |  | 15 | 17 | 35 |  |
Subsidiary of common parent (brookfield) |  |  |  |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |  |  |
Amounts payable, related party transactions | 32 |  | 32 |  |  | 32 |  | 33 |
Interest expense, related party transactions |  |  | 7 |  | 9 | 14 | 17 |  |
Subsidiary and corporate borrowings |  |  |  |  |  |  |  |  | $ 450
Corporate borrowings, related party transactions | 276 |  | 276 |  |  | 276 |  | 306 |
Subsidiary of common parent (brookfield) | Fixed interest rate |  |  |  |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  |  |  |  |  |  | 6.33%
Subsidiary of common parent (brookfield) | Brookfield office properties inc. |  |  |  |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |  |  |
Right-of-use assets | 12 |  | 12 |  |  | 12 |  | 12 |
Parent |  |  |  |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |  |  |
Amounts payable, related party transactions | 285 |  | 285 |  |  | 285 |  | 62 |
Deposit balance | 0 |  | 0 |  |  | 0 |  | $ 0 |
Interest expense, related party transactions |  |  | 0 |  | $ 0 | 0 | $ 0 |  |
Credit facility, maximum borrowing capacity | 1,000 |  | $ 1,000 |  |  | $ 1,000 |  |  |
Parent | European Hyperscale Data Center |  |  |  |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |  |  |
Proceeds from sales of interests in associates |  | $ 210 |  | 1,700 |  |  |  |  |
Gains recognised when control of subsidiary is lost |  |  |  | 160 |  |  |  |  |
Property, plant and equipment |  | 775 |  |  |  |  |  |  |
Intangible assets |  | 70 |  |  |  |  |  |  |
Goodwill |  | 165 |  |  |  |  |  |  |
Net debt |  | $ 745 |  |  |  |  |  |  |
Parent | Global intermodal logistics operation |  |  |  |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |  |  |
Gains recognised when control of subsidiary is lost |  |  |  | $ 115 |  |  |  |  |
Parent | U.S. bulk fiber network |  |  |  |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |  |  |
Proceeds from sales of interests in associates | $ 1,300 |  |  |  |  |  |  |  |

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