PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS - Estimated Projected Benefit Payments for the Next 10 Years (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013
Pension
Defined Benefit Plan Disclosure [Line Items]
Expected Future Benefit Payments in 2014	$ 341
Expected Future Benefit Payments in 2015	348
Expected Future Benefit Payments in 2016	354
Expected Future Benefit Payments in 2017	361
Expected Future Benefit Payments in 2018	367
Expected Future Benefit Payments in 2019-2023	1,924
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Expected Future Benefit Payments in 2014	35
Expected Future Benefit Payments in 2015	25
Expected Future Benefit Payments in 2016	24
Expected Future Benefit Payments in 2017	22
Expected Future Benefit Payments in 2018	21
Expected Future Benefit Payments in 2019-2023	$ 90