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SHARE-BASED COMPENSATION (DETAILS) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Restricted Stock And Restricted Stock Units [Member]
Reconcilation of Beginning and Ending Balance of Nonvested Restricted Stock (including RSUs) [Abstract]
Share based compensation expense incurred	$ 19	$ 10	$ 36	$ 29
Tax benefit related to share-based compensation costs incurred	5	4	8	8
Fair value - vested during period			62	71
Unrecognized share-based compensation costs	122		$ 122
Unrecognized share-based compensation costs - weighted average period expected to be recognized			2 years 6 months 25 days
Restricted Stock And Restricted Stock Units [Member] | Cash Settled [Member]
Reconcilation of Beginning and Ending Balance of Nonvested Restricted Stock (including RSUs) [Abstract]
Liability for cash-settled units	$ 30	$ 20	$ 30	$ 20
Performance Based Restricted Stock and Restricted Stock Units [Member] | Share Settled [Member]
Reconcilation of Beginning and Ending Balance of Nonvested Restricted Stock (including RSUs) [Roll Forward]
Nonvested restricted stock (number) - beginning of period			201
Granted (number)			104
Vested (number)			(16)
Forfeited (number)			0
Nonvested restricted stock (number) - end of period	289		289
Reconcilation of Beginning and Ending Balance of Nonvested Restricted Stock (including RSUs) [Abstract]
Weighted average grant date fair value - beginning of period (in usd per share)			$ 49.24
Weighted average grant date fair value - granted (in usd per share)			53.80
Weighted average grant date fair value - vested (in usd per share)			44.33
Weighted average grant date fair value - forfeited (in usd per share)			0.00
Weighted average grant date fair value - end of period (in usd per share)	$ 51.14		$ 51.14
Performance Based Restricted Stock and Restricted Stock Units [Member] | Cash Settled [Member]
Reconcilation of Beginning and Ending Balance of Nonvested Restricted Stock (including RSUs) [Roll Forward]
Nonvested restricted stock (number) - beginning of period			70
Granted (number)			18
Vested (number)			0
Forfeited (number)			0
Nonvested restricted stock (number) - end of period	88		88
Service Based Restricted Stock And Restricted Stock Units [Member] | Share Settled [Member]
Reconcilation of Beginning and Ending Balance of Nonvested Restricted Stock (including RSUs) [Roll Forward]
Nonvested restricted stock (number) - beginning of period			1,954
Granted (number)			584
Vested (number)			(774)
Forfeited (number)			(40)
Nonvested restricted stock (number) - end of period	1,724		1,724
Reconcilation of Beginning and Ending Balance of Nonvested Restricted Stock (including RSUs) [Abstract]
Weighted average grant date fair value - beginning of period (in usd per share)			$ 43.34
Weighted average grant date fair value - granted (in usd per share)			53.84
Weighted average grant date fair value - vested (in usd per share)			39.21
Weighted average grant date fair value - forfeited (in usd per share)			46.51
Weighted average grant date fair value - end of period (in usd per share)	$ 48.69		$ 48.69
Service Based Restricted Stock And Restricted Stock Units [Member] | Cash Settled [Member]
Reconcilation of Beginning and Ending Balance of Nonvested Restricted Stock (including RSUs) [Roll Forward]
Nonvested restricted stock (number) - beginning of period			1,433
Granted (number)			491
Vested (number)			(366)
Forfeited (number)			(40)
Nonvested restricted stock (number) - end of period	1,518		1,518

X

- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 14.F)
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-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14
-Section F

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- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for stock option plans and other equity-based compensation arrangements.

+ References

No definition available.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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- Definition

The number of grants made 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).

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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).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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-Name Accounting Standards Codification
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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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