Asbestos-Related Liabilities (Narrative) (Details) Claim in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) Claim Pending_Claim	Dec. 31, 2014 Claim	Dec. 31, 2013 Claim	Dec. 31, 2012 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
Accrued asbestos claims and related legal costs	$ 271,000,000
Unasserted claims	$ 231,000,000
Accrued asbestos-related claims cost, final maturity date	2025
Percentage of claims that do not specify damages	82.00%
Claims outstanding | Claim	55	54	53	51
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	17.00%
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	1.00%
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	73.00%
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	3