Asbestos-Related Liabilities (Summary Of Outstanding Claims By Year Of Exposure And State Filed) (Details)	Sep. 30, 2012	Dec. 31, 2011
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Claims outstanding	51,000	50,000
Asbestos After 1964 [Member]
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Claims outstanding		15,000
Texas [Member] | Asbestos Before Or During 1964 [Member]
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Claims outstanding		12,000
Pennsylvania [Member] | Asbestos Before Or During 1964 [Member]
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Claims outstanding		2,000
Other States That Have Enacted Asbestos Legislation [Member] | Asbestos Before Or During 1964 [Member]
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Claims outstanding		6,000
Other States [Member] | Asbestos Before Or During 1964 [Member]
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Claims outstanding		15,000