Asbestos-Related Liabilities (Narrative) (Details) (USD $)	12 Months Ended							0 Months Ended
	Dec. 31, 2012 Claims Pending_Claim	Dec. 31, 2011 Pending_Claim	Dec. 31, 2010 Pending_Claim	Dec. 31, 2009 Pending_Claim	Dec. 31, 2012 Damage Claims Less Than $5 [Member]	Dec. 31, 2012 Damage Claims From $5 To Less Than $100 [Member]	Dec. 31, 2012 Damage Claims Less Than $25 [Member]	Dec. 31, 2012 Damages Claims In Excess Of $100 [Member] Pending_Claim	Dec. 31, 2012 Maximum [Member] Damage Claims Less Than $5 [Member]	Dec. 31, 2012 Maximum [Member] Damage Claims From $5 To Less Than $100 [Member]	Dec. 31, 2012 Maximum [Member] Damage Claims Less Than $25 [Member]	Dec. 31, 2012 Minimum [Member] Damage Claims From $5 To Less Than $100 [Member]
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Holding period for insulation operations (in days)	90 days
Outstanding claims involving maritime workers (in pending claims)	3,100
Inactive claims (in claims)	19,000
Accrued asbestos claims and related legal costs	$ 256,000,000
Unasserted claims	204,000,000
Accrued asbestos-related claims cost, final maturity date	2022
Percentage of claims that do not specify damages	88.00%
Percentage Of Claims Damages Specified					11.00%	1.00%	90.00%
Damages claims amount								$ 100,000,000	$ 5,000,000	$ 100,000,000	$ 25,000,000	$ 5,000,000
Claims outstanding	51,000	50,000	50,000	50,000				3,000,000