BENEFITS Benefits - Obligations and Funded Status (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest cost		$ 1	$ 1	$ 1
Fair value of plan assets at beginning of period		114
Fair value of plan assets at end of period		118	114
Other Postretirement Benefit Plan [Member]
Benefit obligation at beginning of period		24	25
Interest cost		1	1
Actuarial (gain) loss		(2)	1
Benefits paid, net		(2)	(2)
Change in Benefit Obligations, Dispositions		0	(1)
Benefit obligation at end of period		21	24	25
Fair value of plan assets at beginning of period		114	110
Return on plan assets and other		(1)	4
Employer contributions		7	7
Change in Plan Assets, Dispositions		0	(5)
Fair value of plan assets at end of period		118	114	$ 110
Amount overfunded at end of period (1)	[1]	(97)	(90)
Net actuarial loss		(10)	(16)
Prior service cost		14	15
Amounts recognized in accumulated other comprehensive income (pre-tax basis) consist of:		$ 4	$ (1)

[1] Recorded as a non-current asset in the consolidated balance sheets.