PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS - Fair Value of Derivatives (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Derivatives, Fair Value, Net	$ 425	$ 290
Equity index instruments
Defined Benefit Plan Disclosure [Line Items]
Derivatives, Fair Value, Net	29	4
Forward contracts
Defined Benefit Plan Disclosure [Line Items]
Derivatives, Fair Value, Net	(9)	(2)
Swaps
Defined Benefit Plan Disclosure [Line Items]
Derivatives, Fair Value, Net	$ 405	$ 288