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Asbestos-Related Liabilities (Narrative) (Details)
 12 Months Ended
Dec. 31, 2016
USD ($)
Pending_Claim
Claim
Dec. 31, 2015
Claim
Dec. 31, 2014
Claim
Dec. 31, 2013
Claim
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]        
Holding period for insulation operations (in days) 90 days      
Number of inactive claims | Claim 19,000 19,000    
Percentage of claims that do not specify damages 82.00%      
Claims outstanding | Claim 55,500 54,500 54,000 53,000
Accrued asbestos claims and related legal costs $ 342,000,000      
Unasserted claims $ 300,000,000      
Damage claims less than $5 [Member]        
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]        
Percentage of claims damages specified 15.00%      
Damage claims less than $5 [Member] | Maximum [Member]        
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]        
Damages claims amount $ 5,000,000      
Damage claims from $5 to less than $100 [Member]        
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]        
Percentage of claims damages specified 3.00%      
Damage claims from $5 to less than $100 [Member] | Maximum [Member]        
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]        
Damages claims amount $ 100,000,000      
Damage claims from $5 to less than $100 [Member] | Minimum [Member]        
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]        
Damages claims amount $ 5,000,000      
Damage claims less than $25 [Member]        
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]        
Percentage of claims damages specified 40.00%      
Damage claims less than $25 [Member] | Maximum [Member]        
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]        
Damages claims amount $ 25,000,000      
Damages claims in excess of $100 [Member]        
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]        
Damages claims amount $ 100,000,000      
Claims outstanding | Pending_Claim 5