PROPERTY (Schedule of Other Items Related to Property) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 176	$ 166	$ 160
Capitalized interest	$ 10	$ 13	$ 10