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PROPERTY, PLANT AND EQUIPMENT - Additional Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Utilities    
Disclosure of detailed information about property, plant and equipment [line items]    
Right-of-use assets $ 20  
Transport    
Disclosure of detailed information about property, plant and equipment [line items]    
Right-of-use assets 1,329  
Energy    
Disclosure of detailed information about property, plant and equipment [line items]    
Right-of-use assets 252  
Data Infrastructure    
Disclosure of detailed information about property, plant and equipment [line items]    
Right-of-use assets 560  
Accumulated fair value adjustments:    
Disclosure of detailed information about property, plant and equipment [line items]    
Gain from revaluation 719 $ 462
Accumulated fair value adjustments: | Utilities    
Disclosure of detailed information about property, plant and equipment [line items]    
Gain from revaluation 347 220
Accumulated fair value adjustments: | Transport    
Disclosure of detailed information about property, plant and equipment [line items]    
Gain from revaluation 45 18
Accumulated fair value adjustments: | Energy    
Disclosure of detailed information about property, plant and equipment [line items]    
Gain from revaluation 327 224
Accumulated fair value adjustments: | Data Infrastructure    
Disclosure of detailed information about property, plant and equipment [line items]    
Gain from revaluation $ 0 $ 0