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INVESTMENT IN ASSOCIATES AND JOINT VENTURES - Change in Investments (Details) - USD ($) $ in Millions |  |  |  |  |  |  |  |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 18, 2024 | Oct. 03, 2023 | Aug. 31, 2023 | Jun. 15, 2023 | Jun. 14, 2023 | May 02, 2023 | Apr. 26, 2023 | Apr. 01, 2023 | Feb. 01, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Reconciliation of changes in associates and joint ventures |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at the beginning of the period |  |  |  |  |  |  |  |  |  |  |  | $ 5,402 | $ 5,325 | $ 5,325
Share of earnings for the period |  |  |  |  |  |  |  |  |  | $ 95 | $ 273 | 136 | 376 | 459
Foreign currency translation and other |  |  |  |  |  |  |  |  |  |  |  | (238) |  | 172
Share of other comprehensive income (loss) |  |  |  |  |  |  |  |  |  |  |  | 123 |  | (92)
Distributions(2),(6) |  |  |  |  |  |  |  |  |  |  |  | (138) |  | (782)
Disposition of interest |  |  |  |  |  |  |  |  |  |  |  | 0 |  | (778)
Acquisitions |  |  |  |  |  |  |  |  |  |  |  | 350 |  | 1,098
Balance at end of year |  |  |  |  |  |  |  |  |  | 5,635 |  | 5,635 |  | 5,402
Disclosure Of Associates And Joint Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal of investments in associates and joint ventures |  |  |  |  |  |  |  |  |  | 0 | $ 672 | 0 | $ 672 |
Acquisitions |  |  |  |  |  |  |  |  |  |  |  | 350 |  | 1,098
U.S. Gas Pipeline |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal of investments in associates and joint ventures |  |  |  | $ 420 |  |  |  | $ 70 |  |  |  |  |  |
Gain (Loss) on sale of investments accounted for using equity method |  |  |  | $ 80 |  |  |  | 12 |  |  |  |  |  |
Ownership interest |  |  |  | 25.00% | 38.00% |  |  |  |  |  |  |  |  |
Reclassification adjustments on exchange differences on translation, net of tax |  |  |  |  |  |  |  | $ 14 |  |  |  |  |  |
AusNet Services Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal of investments in associates and joint ventures |  |  | $ 435 |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on sale of investments accounted for using equity method |  |  | 30 |  |  |  |  |  |  |  |  |  |  |
Reclassification adjustments on exchange differences on translation, net of tax |  |  | $ 28 |  |  |  |  |  |  |  |  |  |  |
North American Natural Gas Transmission Operation |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans and receivables |  |  |  |  |  |  |  |  |  | $ 250 |  | $ 250 |  | $ 250
New Zealand Data Center Operation |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal of ownership interest, percentage |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |
Disposal of investments in associates and joint ventures |  |  |  | $ 275 |  |  |  |  |  |  |  |  |  |
Gain (Loss) on sale of investments accounted for using equity method |  |  |  | $ 220 |  |  |  |  |  |  |  |  |  |
Ownership interest |  |  |  | 12.00% |  |  |  |  |  |  |  |  |  |
Reclassification adjustments on exchange differences on translation, net of tax |  |  |  | $ 14 |  |  |  |  |  |  |  |  |  |
European Telecom Tower Operation |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reconciliation of changes in associates and joint ventures |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  | $ 702 |  |  |  |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |  | $ 702 |  |  |  |  |
Proportion of voting rights held in associate |  |  |  |  |  |  |  |  | 6.00% |  |  |  |  |
Freehold Landlord Port in Victoria, Australia |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal of ownership interest, percentage |  |  |  |  |  |  | 50.00% |  |  |  |  |  |  |
Disposal of investments in associates and joint ventures |  |  |  |  |  |  | $ 70 |  |  |  |  |  |  |
Brazilian regulated gas transmission operation |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of voting rights held in associate |  |  |  |  |  | 31.00% |  |  |  |  |  |  |  |
Proportion of ownership interest in subsidiary, additional |  |  |  |  |  | 15.00% |  |  |  |  |  |  |  |
North American Hyperscale Data Center Platform |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of voting rights held in associate |  | 15.00% |  |  |  |  |  |  |  |  |  |  |  |
Purchase of interests in associates |  | $ 400 |  |  |  |  |  |  |  |  |  |  |  |
Brazilian Rail and Port Logistics Business |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of voting rights held in associate | 21.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of interests in associates | $ 350 |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest in subsidiary, additional | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |

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