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Commitments and Contingencies (Details 2) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Activity related to asbestos liability and related assets  
Balance as of December 31 $ 714
Changes in estimate during the period:  
Changes in estimates during the period continuing operations, Liabilities 22
Changes in estimates during the period continuing operations, Assets 9
Changes in estimates during the period continuing operations, net 13
Changes in estimates during period discontinued operations, Liability 4
Changes in estimates during period discontinued operations, Assets 4
Changes in estimates during period discontinued operations, net 0
Net cash activity (16)
Balance as of March 31 711
Current portion net 0
Noncurrent portion net 0
Asset [Member]
 
Activity related to asbestos liability and related assets  
Balance as of December 31, Asset 954
Changes in estimate during the period:  
Net cash activity, Asset (18)
Balance as of March 31, Asset 949
Current portion 118
Noncurrent portion 831
Liability [Member]
 
Activity related to asbestos liability and related assets  
Balance as of December 31 ,Liability 1,668
Changes in estimate during the period:  
Net cash activity, Liability (34)
Balance as of March 31, Liability 1,660
Current portion 138
Noncurrent portion $ 1,522