SUPPLEMENTAL FINANCIAL STATEMENT INFORMATION (Components of Postretirement Benefit Expense) (Details) (Postretirement benefit expense [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Postretirement benefit expense [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 0
Interest cost	4	4
Actuarial loss	1	3
Amortization of prior service credit	(3)	(6)
Net periodic benefit expense	$ 2	$ 1