SUPPLEMENTAL FINANCIAL STATEMENT INFORMATION (Components of Postretirement Benefit Expense) (Details) (Postretirement benefit expense [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Postretirement benefit expense [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 1	$ 1	$ 2
Interest cost	4	5	11	15
Actuarial loss	2	3	5	8
Amortization of prior service credit	(6)	(8)	(18)	(22)
Net periodic benefit expense	$ 0	$ 1	$ (1)	$ 3