INCOME TAXES - Reconciliation of the Beginning and Ending Amount of Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Income Tax Contingency [Line Items]
Balance at beginning of year	$ 6	$ 11
Settlements	0	(4)
Lapse of statute	0	(1)
Balance at end of year	$ 6	$ 6