PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS - Estimated Amortization from Cumulative Other Comprehensive Loss in 2014 (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	$ 135
Prior service cost (credit)	(185)
Net effect cost (credit)	(50)
Pension
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	123
Prior service cost (credit)	5
Net effect cost (credit)	128
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	12
Prior service cost (credit)	(190)
Net effect cost (credit)	$ (178)