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Asbestos-Related Liabilities (Summary of Outstanding Claims by Year Of Exposure and State Filed) (Details) - Claim	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Claims outstanding	55,500	54,500	54,000	53,000
Asbestos After 1964 [Member]
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Claims outstanding	16,000	16,000
Asbestos Before or During 1964 [Member] | Texas [Member]
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Claims outstanding	13,000	13,000
Asbestos Before or During 1964 [Member] | Pennsylvania [Member]
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Claims outstanding	2,000	2,000
Asbestos Before or During 1964 [Member] | Other states that have enacted asbestos legislation [Member]
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Claims outstanding	6,000	6,000
Asbestos Before or During 1964 [Member] | Other states [Member]
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Claims outstanding	18,500	17,500

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Number of pending claims pertaining to a loss contingency.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349

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