TAXES ON INCOME Taxes on Income - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Other postretirement benefits	$ 3	$ 4
Debt amortization	12	30
Other	65	37
Total deferred income tax assets	80	71
Deferred Tax Assets, Valuation Allowance	(2)	(2)
Deferred Tax Assets, Net	78	69
Property, plant and equipment	(484)	(770)
Deferred Tax Liabilities, Investment in Noncontrolled Affiliates	(5)	(6)
Other	(40)	(4)
Deferred Tax Liabilities, Gross	(529)	(780)
Deferred Tax Liabilities, Net	$ (451)	$ (711)