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SHARE-BASED COMPENSATION - Additional Information (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 12 Months Ended 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Sep. 30, 2011
Performance share units
Minimum
Dec. 31, 2011
Performance share units
Maximum
Sep. 30, 2011
Performance share units
Maximum
Dec. 31, 2011
Equity-classified share-based compensation arrangements
years
Dec. 31, 2011
Liability-classified stock appreciation rights
years
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]                
Share-based compensation expense $ 25 $ 24 $ 26          
Number of shares available for future grants under the Plan 11,714,621              
Number of shares of stock options and stock appreciation rights an individual may receive in one year 1,327,093              
Number of shares of restricted stock, restricted stock units, performance shares, performance share units or other equity grants an individual may receive in one year 540,584              
Aggregate number of shares of restricted stock, restricted stock units, performance shares, performance share units or other equity grants that may be issued 9,200,000              
Increase in common share if all share-based awards were exercised or vested 45,000,000              
Total income tax benefit from share-based awards 6 4 9          
Realized excess tax benefits 2 0 0          
Final number of shares awarded of each grant's target       0.00%   150.00%    
Total shareholder return ranking in the S&P 500 during the first two years is used to adjust the initial number of units earned up or down         20.00%      
Unrecognized share-based compensation cost             $ 40 $ 1
Unrecognized share-based compensation costs, weighted average period for recognition             1.8 1.5
Deferred Compensation Arrangements, Overall, Description
Eligible employees:
•
may choose to defer all or part of their bonus into stock-equivalent units and
•
receive a 15 percent premium if the deferral is for at least five years.
Our directors:
•
have a portion of their annual retainer fee automatically deferred into stock-equivalent units,
•
may choose to defer some or all of the remainder of their annual retainer fee into stock-equivalent units and
•
do not receive a premium for their deferrals.
Employees and directors also choose when the deferrals will be paid out although no deferrals may be paid until after the separation from service of the employee or director.
              
Number of common shares to be issued for directors who elected common share payments subsequent to year-end 509,362              
Number of stock-equivalent units outstanding in deferred compensation accounts 1,021,977 1,027,768 430,789          
Increase in number of stock-equivalent units outstanding in our deferred compensation accounts as a result of Special Dividend   664,957