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Asbestos-Related Liabilities (Summary of Outstanding Claims by Year Of Exposure and State Filed) (Details) - Claim | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
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Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items] |  |  |  |
Claims outstanding | 55,500 | 55,500 | 54,500 | 54,000
Claimants alleging first exposure after 1964 |  |  |  |
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items] |  |  |  |
Claims outstanding | 16,500 | 16,000 |  |
Claimants alleging first exposure before or during 1964 | Texas |  |  |  |
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items] |  |  |  |
Claims outstanding | 13,000 | 13,000 |  |
Claimants alleging first exposure before or during 1964 | Pennsylvania |  |  |  |
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items] |  |  |  |
Claims outstanding | 1,500 | 2,000 |  |
Claimants alleging first exposure before or during 1964 | Other states that have enacted asbestos legislation |  |  |  |
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items] |  |  |  |
Claims outstanding | 6,000 | 6,000 |  |
Claimants alleging first exposure before or during 1964 | Other states |  |  |  |
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items] |  |  |  |
Claims outstanding | 18,500 | 18,500 |  |

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- Definition 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=82911808&loc=d3e14435-108349 + Details
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