EMPLOYEE STOCK BENEFIT PLANS (Additional Information) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Options, Grants in Period, Weighted Average Grant Date Fair Value			$ 3.60
Options, Vested, Fair Value	$ 45	$ 73	$ 103
Options, Exercises in Period, Total Intrinsic Value	154	47	6
Stock Options [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Unrecognized compensation cost	13
Expected weighted-average period in years of compensation cost to be recognized	1.1
Restricted Stock Units (RSUs) [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Unrecognized compensation cost	135
Expected weighted-average period in years of compensation cost to be recognized	2.5
Equity Instuments Other Than Options, Granted, Weighted Average Grant Date Fair Value	$ 26.04	$ 24.80	$ 17.77
Equity Instruments Other than Options, Vested in Period, Total Fair Value	75	79	74
Market share units [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Unrecognized compensation cost	27
Expected weighted-average period in years of compensation cost to be recognized	2.9
Equity Instuments Other Than Options, Granted, Weighted Average Grant Date Fair Value	$ 25.83	$ 24.69
Equity Instruments Other than Options, Vested in Period, Total Fair Value	8
Long term performance awards [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Unrecognized compensation cost	30
Expected weighted-average period in years of compensation cost to be recognized	1.5
Equity Instuments Other Than Options, Granted, Weighted Average Grant Date Fair Value	$ 25.30	$ 23.65	$ 15.59
Equity Instruments Other than Options, Vested in Period, Total Fair Value	$ 21	$ 56	$ 21

This element represents the fair value of options that vested in the period.

No definition available.

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- Definition

As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

+ References

+ Details

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- Definition

The weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, using a decimal to express in number of years.

+ References

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(2)(c)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph c(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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- Definition

The total fair value of equity-based awards for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

+ References

+ Details

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- Definition

The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the plan.

+ References

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

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