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SEGMENT INFORMATION (Assets) (Details) - USD ($) $ in Millions | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Disclosure of operating segments [line items] |  |
Assets | $ (60,278) | $ (61,331)
Material reconciling items [member] | Associates [member] |  |
Disclosure of operating segments [line items] |  |
Assets | (4,832) | (4,895)
Material reconciling items [member] | Non-controlling interests [member] |  |
Disclosure of operating segments [line items] |  |
Assets | (36,993) | (37,851)
Material reconciling items [member] | Working capital adjustment and other |  |
Disclosure of operating segments [line items] |  |
Assets | (7,744) | (7,301)
Operating segments [member] |  |
Disclosure of operating segments [line items] |  |
Assets | (20,373) | (21,074)
Operating segments [member] | Utilities |  |
Disclosure of operating segments [line items] |  |
Assets | (6,414) | (6,814)
Operating segments [member] | Transport |  |
Disclosure of operating segments [line items] |  |
Assets | (9,188) | (9,155)
Operating segments [member] | Midstream |  |
Disclosure of operating segments [line items] |  |
Assets | (3,245) | (3,829)
Operating segments [member] | Data Infrastructure |  |
Disclosure of operating segments [line items] |  |
Assets | (3,355) | (3,338)
Operating segments [member] | Corporate |  |
Disclosure of operating segments [line items] |  |
Assets | $ 1,829 | $ 2,062

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