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INTANGIBLE ASSETS - Additional Information (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Disclosure of detailed information about intangible assets [line items]    
Intangible assets $ 11,767 $ 14,386
Intangible assets with indefinite useful life 876 667
Simhapuri Expressway Ltd and Rayalseema Expressway Ltd    
Disclosure of detailed information about intangible assets [line items]    
Intangible assets 641  
BIF India Holdings Pte Ltd    
Disclosure of detailed information about intangible assets [line items]    
Intangible assets 73  
North American residential energy infrastructure operation    
Disclosure of detailed information about intangible assets [line items]    
Intangible assets 1,748 1,806
Australian export terminal    
Disclosure of detailed information about intangible assets [line items]    
Intangible assets 0 1,758
Peruvian toll roads    
Disclosure of detailed information about intangible assets [line items]    
Intangible assets $ 1,073 $ 1,159