FAIR VALUE MEASUREMENTS - Schedule of Changes in Level 3 (Details) - Recurring basis - Level 3 - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning of period balance	$ 0	$ 1	$ 0	$ 5
Purchases	0	0	0	1
Sales	0	0	0	0
Settlements	0	0	0	0
Net (losses) gains	0	(1)	0	(1)
Transfers from Level 3 to Level 2	0	0	0	(5)
End of period balance	0	0	0	0
Net unrealized gain (loss) included in net income for the year relating to assets held at period end	$ 0	$ 0	$ 0	$ 0