Quarterly report pursuant to Section 13 or 15(d)

COMMITMENTS AND CONTINGENCIES (Purchase Commitments) (Details)

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COMMITMENTS AND CONTINGENCIES (Purchase Commitments) (Details) - Capital Commitments [Member]
$ in Millions
9 Months Ended
Sep. 30, 2018
USD ($)
Unrecorded Unconditional Purchase Obligation [Line Items]  
Capital commitments, amount expected $ 700
Amount expended project-to-date, including deposits 130
Capital commitments, amount expected in remaining three months of 2018 60
Capital commitments, amount expected in 2019 360
Capital commitments, amount expected in 2020 $ 150