BENEFITS Benefits - Estimate of Expected Benefit Payments (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012
Other Postretirement Benefit Plans, Defined Benefit
Defined Benefit Plan, Expected Future Benefit Payments in Year One	$ 3
Prescription Drug Subsidy Receipts, Year One	0
Defined Benefit Plan, Expected Future Benefit Payments in Year One, net	3
Defined Benefit Plan, Expected Future Benefit Payments in Year Two	3
Prescription Drug Subsidy Receipts, Year Two	0
Defined Benefit Plan, Expected Future Benefit Payments in Year Two, net	3
Defined Benefit Plan, Expected Future Benefit Payments in Year Three	3
Prescription Drug Subsidy Receipts, Year Three	0
Defined Benefit Plan, Expected Future Benefit Payments in Year Three, net	3
Defined Benefit Plan, Expected Future Benefit Payments in Year Four	3
Prescription Drug Subsidy Receipts, Year Four	0
Defined Benefit Plan, Expected Future Benefit Payments in Year Four, net	3
Defined Benefit Plan, Expected Future Benefit Payments in Year Five	3
Prescription Drug Subsidy Receipts, Year Five	0
Defined Benefit Plan, Expected Future Benefit Payments in Year Five, net	3
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter	12
Prescription Drug Subsidy Receipts, Five Fiscal Years Thereafter	2
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter, net	12
Other Postretirement Benefit Plans, Defined Benefit Net of Medical Subsidiary Receipts [Member]
Defined Benefit Plan, Expected Future Benefit Payments in Year One	3
Defined Benefit Plan, Expected Future Benefit Payments in Year One, net	3
Defined Benefit Plan, Expected Future Benefit Payments in Year Two	3
Defined Benefit Plan, Expected Future Benefit Payments in Year Two, net	3
Defined Benefit Plan, Expected Future Benefit Payments in Year Three	3
Defined Benefit Plan, Expected Future Benefit Payments in Year Three, net	3
Defined Benefit Plan, Expected Future Benefit Payments in Year Four	3
Defined Benefit Plan, Expected Future Benefit Payments in Year Four, net	3
Defined Benefit Plan, Expected Future Benefit Payments in Year Five	3
Defined Benefit Plan, Expected Future Benefit Payments in Year Five, net	3
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter	10
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter, net	$ 10