Asbestos-Related Liabilities (Summary Of Percentage Of Outstanding Claims Related To Claimants Alleging Serious Diseases) (Details)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Total Claims [Member]
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Claims alleging serious diseases	19.00%	18.00%	18.00%
Pre-1964 Claims in States without Asbestos Legislation [Member]
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Claims alleging serious diseases	36.00%	33.00%	31.00%