XML 184 R91.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
FINANCIAL INSTRUMENTS AND RISK MANAGEMENT - Hedge (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Forward foreign exhange contracts | Cash flow hedges    
Items designated as hedging instruments    
Nominal amount   2,394
Carrying Amount Assets   $ 37
Carrying Amount Liabilities   (22)
Change in fair value in OCI   23
Amounts reclassified from hedging reserve to profit or loss   $ 2
Forward foreign exhange contracts | Currency risk | Cash flow hedges    
Items designated as hedging instruments    
Nominal amount 2,331  
Carrying Amount Assets $ 26  
Carrying Amount Liabilities 23  
Change in fair value in OCI (5)  
Amounts reclassified from hedging reserve to profit or loss $ (19)  
Interest swaps | Interest rate risk    
Items designated as hedging instruments    
Nominal amount 120 200
Carrying Amount Liabilities   $ (3)