REVENUE RECOGNITION Contract Assets and Liabilities (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Revenue from Contract with Customer [Abstract]
Contract with Customer, Asset, Net, Current	$ 388	$ 366
Contract with Customer, Liability, Current	38	$ 53
Contract with customer, asset, increase (decrease)	22
Contract with customer, liability increase (decrease)	$ (15)