PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS - Changes in Projected Benefit Obligations (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Pension
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation, beginning	$ 5,841	$ 5,267
Service cost	53	48	44
Interest cost	262	276	278
Plan participants' contributions	0	0
Actuarial (gains) losses	708	611
Foreign currency exchange rate changes	22	(15)
Benefits paid (includes lump sum settlements)	(323)	(338)
Plan amendments	12	(14)
Special termination benefits	0	6
Projected benefit obligation, ending	6,575	5,841	5,267
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation, beginning	402	496
Service cost	1	2	2
Interest cost	15	24	24
Plan participants' contributions	18	19
Actuarial (gains) losses	(1)	29
Foreign currency exchange rate changes	2	(1)
Benefits paid (includes lump sum settlements)	(53)	(59)
Plan amendments	49	(108)
Special termination benefits	0	0
Projected benefit obligation, ending	$ 433	$ 402	$ 496

Amount of gain (loss) from a decision to temporarily deviate from the substantive plan, or from a change in benefit obligation or plan asset value from changes in actuarial assumptions, for example, but not limited to, interest, mortality, employee turnover or salary scale.

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1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. 2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date.

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The amount of payments made for which participants are entitled under a pension plan, including pension benefits, death benefits, and benefits due on termination of employment. Also includes payments made under a postretirement benefit plan, including prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. This item represents a periodic decrease to the plan obligations and a decrease to plan assets.

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-Glossary Postretirement Benefits

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The amount of contributions made by plan participants. This item represents a periodic increase to the plan obligation and an increase to plan assets.

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If applicable, the cost of providing special or contractual termination benefits recognized during the period on the projected benefit obligation.

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Amount of gain (loss) from foreign currency exchange rate changes for benefit obligation for plans of a foreign operation whose functional currency is not the reporting currency.

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The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

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The amount of increase or decrease due to a change in the terms of an existing plan or the initiation of a new plan. A plan amendment may increase or decrease benefits, including those attributed to years of service already rendered.

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The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

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-Glossary Service Cost (Component of Net Periodic Pension Cost)

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