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SEGMENT INFORMATION (Assets) (Details) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | ---
Disclosure of operating segments [line items] |  |  |
Assets | $ 36,580 | $ 29,477 | $ 21,275
Reportable segments |  |  |
Disclosure of operating segments [line items] |  |  |
Assets | 16,527 | 16,632 |
Reportable segments | Utilities |  |  |
Disclosure of operating segments [line items] |  |  |
Assets | 4,864 | 6,542 |
Reportable segments | Transport |  |  |
Disclosure of operating segments [line items] |  |  |
Assets | 6,424 | 6,990 |
Reportable segments | Energy |  |  |
Disclosure of operating segments [line items] |  |  |
Assets | 4,722 | 3,134 |
Reportable segments | Data Infrastructure |  |  |
Disclosure of operating segments [line items] |  |  |
Assets | 1,446 | 1,049 |
Reportable segments | Corporate |  |  |
Disclosure of operating segments [line items] |  |  |
Assets | (929) | (1,083) |
Contribution from investments in associates |  |  |
Disclosure of operating segments [line items] |  |  |
Assets | (2,350) | (3,134) |
Attributable to non- controlling interest |  |  |
Disclosure of operating segments [line items] |  |  |
Assets | 17,545 | 11,668 |
Working capital adjustment and other |  |  |
Disclosure of operating segments [line items] |  |  |
Assets | $ 4,858 | $ 4,311 |

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