FAIR VALUE MEASUREMENTS (Reconciliation of Beginning and Ending Balances of Assets Unobservable Inputs) (Details) - Put Option Derivative Assets [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 1	$ 4
Included in earnings	(1)	(3)
Ending Balance	$ 0	$ 1