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Commitments and Contingencies (Details 1) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Net asbestos charges    
Pre tax asbestos charges from continued operations $ 13 $ 16
Post tax asbestos charges from continued operations 8 12
Pre tax asbestos charges from discontinued operations 0 3
After tax asbestos charges from discontinued operations 0 2
Total pre tax asbestos charges 13 19
Total after tax asbestos charges $ 8 $ 14