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Pensions and Other Postretirement Benefits (Additional Information) (Details) (USD $)
In Millions, unless otherwise specified
9 Months Ended 3 Months Ended 9 Months Ended
Sep. 30, 2012
CompensationPlan
Mar. 31, 2011
Pension Plans, Defined Benefit [Member]
Defined Contribution Pension [Member]
Sep. 30, 2011
Pension Plans, Defined Benefit [Member]
Defined Contribution Pension [Member]
Sep. 30, 2012
Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Expected contributions to defined benefit pension plans in 2012       $ 90
Contributions to defined benefit pension plans       59
Number of plans 1      
Percentage of projected benefit obligation 77.00%      
Decrease in projected benefit obligation (65)      
Decrease in pension expense 12      
Curtailment loss   $ (4) $ (4)