PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS - Estimated Amortization from Cumulative Other Comprehensive Income in 2012 (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	$ 185
Prior service cost (credit)	(118)
Net effect cost (credit)	67
Pension
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	170
Prior service cost (credit)	8
Net effect cost (credit)	178
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	15
Prior service cost (credit)	(126)
Net effect cost (credit)	$ (111)

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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