PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS - Estimated Amortization from Cumulative Other Comprehensive Loss in 2013 (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	$ 234
Prior service cost (credit)	(16)
Net effect cost (credit)	218
Pension
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	220
Prior service cost (credit)	7
Net effect cost (credit)	227
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	14
Prior service cost (credit)	(23)
Net effect cost (credit)	$ (9)

The amounts in accumulated other comprehensive income related to gains and losses that are not recognized immediately and are expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented.

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The amounts in accumulated other comprehensive income related to prior service cost or credit expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented.

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- Definition

The aggregate amount in accumulated other comprehensive income expected to be recognized as a component of net periodic benefit cost over the fiscal year that follows the most recent annual statement of financial position presented, including the net gain (loss), net prior service cost or credit, and net transition asset or obligation.

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