FAIR VALUE MEASUREMENTS - Schedule of Changes in Level 3 (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Purchases, issuances, sales and settlements		$ 0	$ 0	$ 0
Recurring basis | Level 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning of year balance		0	5	5
Net (losses) gains		0	0	0
Transfers from Level 3 to Level 2	$ (5)	0	(5)	0
Balance as of period end		0	0	5
Net unrealized gain (loss) included in net income for the year relating to assets held at year end		$ 0	$ 0	$ 0