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RETIREMENT BENEFITS (Details 4) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
U.S. Pension Plans
     
Discount rate      
Discount rate (as a percent) 3.90% 4.70%  
Assumption used in determining net benefit expense      
Discount rate (as a percent) 4.70% 5.45%  
Expected return on assets (as a percent) 7.00% 7.50% 7.50%
Effect of one-percentage-point change in the discount rates      
Effect of one-percentage-point increase in the discount rates $ 18 $ 19 $ 19
Effect of one-percentage-point decrease in the discount rates (36) (34) (34)
Effect of one-percentage-point change in the expected rates of return      
Effect of one-percentage-point increase in the expected rates of return on pension expense (120) (118) (119)
Effect of one-percentage-point decrease in the expected rates of return on pension expense 120 118 119
Expected returns on Plan assets 897 890 874
Actual return on plan assets 1,303 1,063  
Non - U.S. Pension Plans
     
Effect of one-percentage-point change in the discount rates      
Effect of one-percentage-point increase in the discount rates (48) (57) (49)
Effect of one-percentage-point decrease in the discount rates 64 70 56
Effect of one-percentage-point change in the expected rates of return      
Effect of one-percentage-point increase in the expected rates of return on pension expense (64) (62) (54)
Effect of one-percentage-point decrease in the expected rates of return on pension expense 64 62 54
Expected returns on Plan assets 399 422 378
Actual return on plan assets 786 526  
Non - U.S. Pension Plans | Minimum
     
Discount rate      
Discount rate (as a percent) 1.50% 1.75%  
Future compensation increase rate (as a percent) 1.20% 1.60%  
Expected return on assets, Weighted average (as a percent) 0.90% 1.00%  
Assumption used in determining net benefit expense      
Discount rate (as a percent) 1.75% 1.75%  
Future compensation increase rate (as a percent) 1.60% 1.00%  
Expected long-term rate of return on assets (as a percent) 1.00% 1.00%  
Non - U.S. Pension Plans | Maximum
     
Discount rate      
Discount rate (as a percent) 28.00% 13.25%  
Future compensation increase rate (as a percent) 26.00% 13.30%  
Expected return on assets, Weighted average (as a percent) 11.50% 12.50%  
Assumption used in determining net benefit expense      
Discount rate (as a percent) 13.25% 14.00%  
Future compensation increase rate (as a percent) 13.30% 11.00%  
Expected long-term rate of return on assets (as a percent) 12.50% 12.50%  
Non - U.S. Pension Plans | Weighted Average
     
Discount rate      
Discount rate (as a percent) 5.24% 5.94%  
Future compensation increase rate (as a percent) 3.93% 4.04%  
Expected return on assets, Weighted average (as a percent) 5.76% 6.25%  
Assumption used in determining net benefit expense      
Discount rate (as a percent) 5.94% 6.23%  
Future compensation increase rate (as a percent) 4.04% 4.66%  
Expected long-term rate of return on assets (as a percent) 6.25% 6.89%  
U.S. Postretirement Benefit Plans
     
Discount rate      
Discount rate (as a percent) 3.60% 4.30%  
Assumption used in determining net benefit expense      
Discount rate (as a percent) 4.30% 5.10%  
Health-care cost increase rate for U.S. plans      
Following year (as a percent) 8.50% 9.00%  
Ultimate rate to which cost increase is assume to decline (as a percent) 5.00% 5.00%  
Year in which the ultimate rate is reached 2020 2020  
Effect of one-percentage-point change in assumed health-care cost-trend rates      
Effect on benefits earned and interest cost, increase 2 2  
Effect on benefits earned and interest cost, decrease (1) (2)  
Effect on accumulated postretirement benefit obligation, increase 44 43  
Effect on accumulated postretirement benefit obligation, decrease (39) (38)  
Effect of one-percentage-point change in the expected rates of return      
Expected returns on Plan assets 4 6 8
Actual return on plan assets $ 7 $ 5  
U.S. pension and postretirement benefit plans
     
Assumption used in determining net benefit expense      
Expected long-term rate of return on assets (as a percent) 7.50% 7.50% 7.75%
Effect of one-percentage-point change in the expected rates of return      
Actual rate of return (as a percent) 11.79% 11.13% 14.11%
Grandfathered employees in frozen U.S. pension plans | Minimum
     
Assumption used in determining net benefit expense      
Future compensation increase rate (as a percent) 3.00%    
Grandfathered employees in frozen U.S. pension plans | Maximum
     
Assumption used in determining net benefit expense      
Future compensation increase rate (as a percent) 4.00%    
Postemployment Plans
     
Discount rate      
Discount rate (as a percent) 3.10% 3.95%  
Health-care cost increase rate for U.S. plans      
Following year (as a percent) 8.50% 9.00%  
Ultimate rate to which cost increase is assume to decline (as a percent) 5.00% 5.00%  
Year in which the ultimate rate is reached 2020 2020