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INTANGIBLE ASSETS - Net Amounts (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of detailed information about intangible assets [line items]      
Net intangible assets $ 11,635 $ 9,894  
Cost      
Disclosure of detailed information about intangible assets [line items]      
Net intangible assets 12,515 10,470 $ 4,732
Accumulated amortization      
Disclosure of detailed information about intangible assets [line items]      
Net intangible assets $ (880) $ (576) $ (267)