XML 100 R85.htm IDEA: XBRL DOCUMENT v3.8.0.1
FAIR VALUE OF FINANCIAL INSTRUMENTS - Fair Value Inputs (Details) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities (current and non-current) $ 1,313 $ 381
Recurring fair value measurement    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 750 908
Financial liabilities (current and non-current) 440 381
Recurring fair value measurement | Level 1    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities (current and non-current) 0 0
Recurring fair value measurement | Level 1 | Marketable securities    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 85 3
Recurring fair value measurement | Level 1 | Financial assets (current and non-current)    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 0 0
Recurring fair value measurement | Level 2    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities (current and non-current) 351 335
Recurring fair value measurement | Level 2 | Marketable securities    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 0 0
Recurring fair value measurement | Level 2 | Financial assets (current and non-current)    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 617 863
Recurring fair value measurement | Level 3    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial liabilities (current and non-current) 89 46
Recurring fair value measurement | Level 3 | Marketable securities    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets 0 0
Recurring fair value measurement | Level 3 | Financial assets (current and non-current)    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Financial assets $ 48 $ 42