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Pension Benefit Plans and Other Postretirement Benefits (Details 4) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Weighted average assumptions used to determine net periodic pension costs and net postretirement benefit cost      
Tenure used for computing historical long-term rate of return assumption (in years) 10    
U.S Pension Plans
     
Amortization:      
Actuarial loss $ 96    
Net amortization 96    
Projected and accumulated benefit obligations in excess of the fair value of plan assets      
Projected benefit obligations 2,547 2,437  
Fair value of plan assets 2,011 2,195  
Accumulated benefit obligation 2,457 2,332  
Weighted average assumptions used to determine pension and accumulated postretirement benefit obligations      
Discount rate used to determine pension and accumulated postretirement benefit obligations (as a percent) 4.59% 5.24%  
Rate of compensation increase (as a percent) 3.14% 4.50%  
Weighted average assumptions used to determine net periodic pension costs and net postretirement benefit cost      
Discount rate used to determine net periodic pension costs and net postretirement benefit cost (as a percent) 5.24% 5.84% 6.45%
Rate of compensation increase (as a percent) 4.50% 5.00% 5.00%
Expected long-term rate of return on assets (as a percent) 8.00% 8.00% 8.00%
Non-U.S. Pension Plans
     
Amortization:      
Actuarial loss 21    
Prior service cost (1)    
Net amortization 20    
Projected and accumulated benefit obligations in excess of the fair value of plan assets      
Projected benefit obligations 1,157 1,006  
Fair value of plan assets 837 687  
Accumulated benefit obligation 1,065 905  
Weighted average assumptions used to determine pension and accumulated postretirement benefit obligations      
Discount rate used to determine pension and accumulated postretirement benefit obligations (as a percent) 4.75% 5.28%  
Rate of compensation increase (as a percent) 3.23% 3.49%  
Weighted average assumptions used to determine net periodic pension costs and net postretirement benefit cost      
Discount rate used to determine net periodic pension costs and net postretirement benefit cost (as a percent) 5.28% 5.64% 5.88%
Rate of compensation increase (as a percent) 3.49% 3.54% 2.65%
Expected long-term rate of return on assets (as a percent) 6.44% 6.78% 6.95%
U.S Postretirement Benefit Plans
     
Amortization:      
Actuarial loss 5    
Prior service cost (3)    
Net amortization $ 2    
Weighted average assumptions used to determine pension and accumulated postretirement benefit obligations      
Discount rate used to determine pension and accumulated postretirement benefit obligations (as a percent) 4.47% 5.09% 5.68%
Weighted average assumptions used to determine net periodic pension costs and net postretirement benefit cost      
Discount rate used to determine net periodic pension costs and net postretirement benefit cost (as a percent) 5.09% 5.68% 6.40%
Non-U.S. Postretirement Benefit Plans
     
Weighted average assumptions used to determine pension and accumulated postretirement benefit obligations      
Discount rate used to determine pension and accumulated postretirement benefit obligations (as a percent) 4.13% 5.02% 5.60%
Weighted average assumptions used to determine net periodic pension costs and net postretirement benefit cost      
Discount rate used to determine net periodic pension costs and net postretirement benefit cost (as a percent) 5.02% 5.60% 6.40%