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SHARE-BASED COMPENSATION (DETAILS 2) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Restricted Stock And Restricted Stock Units RSU [Member] |  |  |
Reconcilation of Beginning and Ending Balance of Nonvested Restricted Stock (including RSUs) [Line Items] |  |  |
Share based compensation expense incurred | $ 59 | $ 73 | $ 57
Tax benefit related to share-based compensation costs incurred | $ 15 | $ 14 | $ 10
Restricted Stock And Restricted Stock Units RSU [Member] | Share Settled [Member] |  |  |
Reconcilation of Beginning and Ending Balance of Nonvested Restricted Stock (including RSUs) [Line Items] |  |  |
Granted (number) | 661,398 | 1,121,066 | 1,007,425
Weighted average grant date fair value - granted | $ 51.95 | $ 44.46 | $ 39.52
Restricted Stock And Restricted Stock Units RSU [Member] | Cash Settled [Member] |  |  |
Reconcilation of Beginning and Ending Balance of Nonvested Restricted Stock (including RSUs) [Line Items] |  |  |
Nonvested restricted stock (number) - beginning of year | 1,503,380 |  |
Granted (number) | 487,758 | 1,018,083 |
Nonvested restricted stock (number) - end of year | 1,503,264 | 1,503,380 |
Liability for cash-settled units | $ 33 | $ 21 |
Performance Based Restricted Stock and Restricted Stock Units [Member] | Share Settled [Member] |  |  |
Reconcilation of Beginning and Ending Balance of Nonvested Restricted Stock (including RSUs) [Line Items] |  |  |
Nonvested restricted stock (number) - beginning of year | 347,000 |  |
Granted (number) | 104,000 |  |
Vested (number) | 0 |  |
Forfeited (number) | (250,000) |  |
Nonvested restricted stock (number) - end of year | 201,000 | 347,000 |
Weighted average grant date fair value - beginning of year | $ 37.34 |  |
Weighted average grant date fair value - granted | 53.32 |  |
Weighted average grant date fair value - vested | 0.00 |  |
Weighted average grant date fair value - forfeited | 34.42 |  |
Weighted average grant date fair value - end of year | $ 49.24 | $ 37.34 |
Performance Based Restricted Stock and Restricted Stock Units [Member] | Cash Settled [Member] |  |  |
Reconcilation of Beginning and Ending Balance of Nonvested Restricted Stock (including RSUs) [Line Items] |  |  |
Granted (number) | 18,659 |  |
Service Based Restricted Stock And Restricted Stock Units [Member] | Share Settled [Member] |  |  |
Reconcilation of Beginning and Ending Balance of Nonvested Restricted Stock (including RSUs) [Line Items] |  |  |
Nonvested restricted stock (number) - beginning of year | 2,768,000 |  |
Granted (number) | 557,000 |  |
Vested (number) | (1,156,000) |  |
Forfeited (number) | (215,000) |  |
Nonvested restricted stock (number) - end of year | 1,954,000 | 2,768,000 |
Weighted average grant date fair value - beginning of year | $ 38.70 |  |
Weighted average grant date fair value - granted | 51.70 |  |
Weighted average grant date fair value - vested | 36.31 |  |
Weighted average grant date fair value - forfeited | 43.02 |  |
Weighted average grant date fair value - end of year | $ 43.34 | $ 38.70 |
Service Based Restricted Stock And Restricted Stock Units [Member] | Cash Settled [Member] |  |  |
Reconcilation of Beginning and Ending Balance of Nonvested Restricted Stock (including RSUs) [Line Items] |  |  |
Granted (number) | 469,099 |  |

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- 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) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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