PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS - Changes in Projected Benefit Obligations of Our Pension and Other Postretirement Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Pension
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation, beginning	$ 5,834	$ 6,575
Service cost	53	64	53
Interest cost	271	244	262
Plan participants’ contributions	0	0
Actuarial (gains) losses	1,006	(666)
Foreign currency exchange rate changes	(87)	(66)
Benefits paid (includes lump sum settlements)	(391)	(317)
Plan amendments and other	1	0
Special/contractual termination benefits	7	0
Plan transfer/Acquisitions	4	0
Projected benefit obligation, ending	6,698	5,834	6,575
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation, beginning	321	433
Service cost	1	1	1
Interest cost	10	12	15
Plan participants’ contributions	13	16
Actuarial (gains) losses	4	(23)
Foreign currency exchange rate changes	(7)	(5)
Benefits paid (includes lump sum settlements)	(44)	(50)
Plan amendments and other	2	(66)
Special/contractual termination benefits	0	0
Plan transfer/Acquisitions	3	3
Projected benefit obligation, ending	$ 303	$ 321	$ 433

PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS - Changes in Projected Benefit Obligations of Our Pension and Other Postretirement Benefit Plans (Details) (USD $)
In Millions, unless otherwise specified

12 Months Ended

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Pension

Defined Benefit Plan Disclosure [Line Items]

Projected benefit obligation, beginning

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Service cost

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Interest cost

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Plan participants’ contributions

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Actuarial (gains) losses

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Foreign currency exchange rate changes

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Benefits paid (includes lump sum settlements)

(391)us-gaap_DefinedBenefitPlanBenefitsPaid
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Plan amendments and other

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Special/contractual termination benefits

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Plan transfer/Acquisitions

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Projected benefit obligation, ending

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Other Postretirement Benefits

Defined Benefit Plan Disclosure [Line Items]

Projected benefit obligation, beginning

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Service cost

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Interest cost

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Plan participants’ contributions

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Actuarial (gains) losses

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Foreign currency exchange rate changes

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Benefits paid (includes lump sum settlements)

(44)us-gaap_DefinedBenefitPlanBenefitsPaid
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Plan amendments and other

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Special/contractual termination benefits

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Plan transfer/Acquisitions

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Projected benefit obligation, ending

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- Definition

Amount of gain (loss) related to change in benefit obligation resulting from changes in actuarial assumptions, for example, but not limited to, interest, mortality, employee turnover, salary, and temporary deviation from the substantive plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Glossary Gain or Loss

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-Topic 715

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-Section 50

-Paragraph 1

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a)

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-Glossary Projected Benefit Obligation

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-Name Accounting Standards Codification

-Glossary Accumulated Postretirement Benefit Obligation

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Postretirement Benefits

-URI http://asc.fasb.org/extlink&oid=6521376

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-Name Accounting Standards Codification

-Topic 715

-SubTopic 60

-Section 50

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-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Glossary 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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- Definition

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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- Definition

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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Changes in the defined benefit obligation, not otherwise separately disclosed in the financial statements.

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No definition available.

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 60

-Glossary Plan Amendment

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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.

+ References

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-Publisher FASB

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-Paragraph 1

-Subparagraph (h)(1)

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

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-Subparagraph (a)(1)

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The amount of increase related to special termination benefits offered to and accepted by employees in connection with their termination of employment that are only offered for a short period of time. A situation involving termination benefits may also involve a curtailment.

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