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SIGNIFICANT ACCOUNTING POLICIES SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($)
$ in Millions
Jan. 01, 2019
Dec. 31, 2017
Prospective Adoption of New Accounting Pronouncements [Line Items]    
Cumulative Effect of New Accounting Principle in Period of Adoption   $ 16
Weighted average lessee's incremental borrowing rate applied to lease liabilities recognised at date of initial application of IFRS 16 5.00%  
Property, plant and equipment [member]    
Prospective Adoption of New Accounting Pronouncements [Line Items]    
Cumulative Effect of New Accounting Principle in Period of Adoption $ 1,200