Annual report pursuant to Section 13 and 15(d)

STOCK INCENTIVE AND STOCK OPTION PLANS (Details)

v3.3.1.900
STOCK INCENTIVE AND STOCK OPTION PLANS (Details)
$ in Millions
12 Months Ended
Dec. 31, 2015
USD ($)
option
shares
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
May. 31, 2012
shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]        
Number of stock-based awards authorized to be granted to executives, employees and non-employee directors under the 2012 Omnibus Plant (in shares) | shares       3,500,000
Stock options' expiration from the date of grant 10 years      
Stock options vesting period 3 years 2 years    
Stock options granted for every even block of 100 KESIP shares purchased by the employee | option 50      
Number of shares in every even block of KESIP shares | shares 100      
Excess tax benefit / (deficiency) associated with share-based plans $ 1 $ 5 $ 13  
Total unrecognized compensation expense (net of estimated forfeitures) $ 26      
Weighted-average maximum period of recognition of total unrecognized compensation expense related to nonvested awards 2 years      
Performance Shares | Minimum        
Share-based Compensation Arrangement by Share-based Payment Award        
Target award based on the actual ROE performance (as a percent) 0.00%      
Performance Shares | Maximum        
Share-based Compensation Arrangement by Share-based Payment Award        
Target award based on the actual ROE performance (as a percent) 200.00%      
Restricted Shares        
Share-based Compensation Arrangement by Share-based Payment Award        
Restricted shares released after two years (as a percent) 33.33%      
Period after which portion of issued restricted shares will be released 2 years      
Restricted shares released on the grant date each year after the first two years (as a percent) 33.33%      
Employee Stock        
Share-based Compensation Arrangement by Share-based Payment Award        
Compensation expense (net of estimated forfeitures) $ 22 35 34  
Non-Employee Stock        
Share-based Compensation Arrangement by Share-based Payment Award        
Compensation expense (net of estimated forfeitures) $ 2 $ 1 $ 3