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Commitments And Contingencies - Activity Related to Asbestos Claims (Detail)
9 Months Ended
Sep. 30, 2012
Claim
Sep. 30, 2011
Claim
Schedule Of Activities Related To Claims Filed [Line Items]    
Pending claims - Ending 29,000  
Asbestos Issue [Member]
   
Schedule Of Activities Related To Claims Filed [Line Items]    
Pending claims - Beginning 105,000 104,000
New claims 3,000 4,000
Settlements (1,000) (1,000)
Dismissals(a) (11,000) (2,000)
Pending claims - Ending 96,000 105,000