ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Changes in accumulated other comprehensive loss (AOCL) by components
Balance as of beginning year	$ 1,352
Net other comprehensive loss		$ (1)
Balance as of end year	1,151	1,352
Cash flow hedges
Changes in accumulated other comprehensive loss (AOCL) by components
Balance as of beginning year	$ (2)	(1)	$ (1)
Other comprehensive loss before reclassifications		(1)
Amounts reclassified from AOCL
Balance as of end year	$ (2)	$ (2)	$ (1)