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
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%