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SEGMENT INFORMATION (Assets) (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Disclosure of operating segments [line items]    
Assets $ 61,331 $ 56,308
Operating segments    
Disclosure of operating segments [line items]    
Assets 21,074 19,250
Operating segments | Utilities    
Disclosure of operating segments [line items]    
Assets 6,814 6,679
Operating segments | Transport    
Disclosure of operating segments [line items]    
Assets 9,155 7,962
Operating segments | Midstream    
Disclosure of operating segments [line items]    
Assets 3,829 3,689
Operating segments | Data    
Disclosure of operating segments [line items]    
Assets 3,338 2,204
Operating segments | Corporate    
Disclosure of operating segments [line items]    
Assets (2,062) (1,284)
Contribution from investments in associates    
Disclosure of operating segments [line items]    
Assets (4,895) (2,884)
Attributable to non- controlling interest    
Disclosure of operating segments [line items]    
Assets 37,851 32,621
Working capital adjustment and other    
Disclosure of operating segments [line items]    
Assets $ 7,301 $ 7,321