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INCOME TAXES - Deferred Income Tax Balances (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred income tax assets, gross $ 394 $ 361  
Deferred income tax liabilities, gross (3,740) (3,144)  
Deferred income tax assets 75 66  
Deferred income tax liabilities (3,421) (2,849)  
Net deferred income tax liabilities (3,346) (2,783) $ (1,538)
Tax losses carried forward      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred income tax assets, gross 394 361  
Net deferred income tax liabilities 394 361 $ 357
Property, plant and equipment and investment properties      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred income tax liabilities, gross (1,702) (1,374)  
Intangible assets      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred income tax liabilities, gross (2,115) (1,761)  
Financial instruments and other      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred income tax liabilities, gross $ 77 $ (9)