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INCOME TAXES - Deferred Income Tax Balances (Details) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred income tax assets, gross $ 361 $ 482  
Deferred income tax liabilities, gross (3,144) (2,020)  
Deferred income tax assets 66 74  
Deferred income tax liabilities (2,849) (1,612)  
Net deferred income tax liabilities (2,783) (1,538) $ (1,303)
Tax losses carried forward      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred income tax assets, gross 361 357  
Net deferred income tax liabilities 361 357 $ 239
Financial instruments and other      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred income tax assets, gross 0 125  
Deferred income tax liabilities, gross (9) 0  
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 (1,374) (1,306)  
Intangible assets      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred income tax liabilities, gross $ (1,761) $ (714)