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SHARE-BASED COMPENSATION (DETAILS) - USD ($)
$ in Millions
1 Months Ended 2 Months Ended 12 Months Ended
May 31, 2012
May 31, 2009
May 31, 2007
Feb. 24, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Restricted Stock And Restricted Stock Units [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Fair value of restricted stock and cash settled awards vested         $ 67 $ 75 $ 68
Unrecognized compensation costs         $ 85 $ 95  
Weighted average period for recognition of share based compensation         2 years 3 months 27 days 2 years 2 months 7 days  
Restricted Stock And Restricted Stock Units [Member] | Share Settled [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of restricted stock and restricted stock units granted (in shares)         692,316 661,398 1,121,066
Restricted Stock And Restricted Stock Units [Member] | Cash Settled [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of restricted stock and restricted stock units granted (in shares)         515,122 487,758 1,018,083
Service Based Restricted Stock And Restricted Stock Units [Member] | Share Settled [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of restricted stock and restricted stock units granted (in shares)         589,000    
Service Based Restricted Stock And Restricted Stock Units [Member] | Cash Settled [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of restricted stock and restricted stock units granted (in shares)         497,329    
Performance Based Restricted Stock and Restricted Stock Units [Member] | Share Settled [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of restricted stock and restricted stock units granted (in shares)         104,000    
Performance Based Restricted Stock and Restricted Stock Units [Member] | Cash Settled [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of restricted stock and restricted stock units granted (in shares)         17,793    
2007 Long-term Equity Compensation Plan [Member] | Share Settled [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Additional shares authorized for issuance under plan (in shares) 6,000,000 4,000,000 5,000,000        
Maximum number of shares to be issued under the plan (in shares)         15,000,000    
Number of awards available for grant under plan (in shares)         5,714,048    
Period of time subsequent to a change in control during which plan allows for accelerated vesting of awards for certain terminations         2 years    
2007 Long-term Equity Compensation Plan [Member] | Service Based Restricted Stock And Restricted Stock Units [Member] | Cliff Vesting [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
General award vesting period         3 years    
2007 Long-term Equity Compensation Plan [Member] | Service Based Restricted Stock And Restricted Stock Units [Member] | Graded Vesting [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
General award vesting period         4 years    
Annual award vesting percentage         25.00%    
Subsequent Event [Member] | 2007 Long-term Equity Compensation Plan [Member] | Restricted Stock And Restricted Stock Units [Member] | Cash Settled [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of restricted stock and restricted stock units granted (in shares)       420,070      
Subsequent Event [Member] | 2007 Long-term Equity Compensation Plan [Member] | Service Based Restricted Stock And Restricted Stock Units [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of restricted stock and restricted stock units granted (in shares)       892,574      
Subsequent Event [Member] | 2007 Long-term Equity Compensation Plan [Member] | Performance Based Restricted Stock and Restricted Stock Units [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of restricted stock and restricted stock units granted (in shares)       102,558