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Asbestos-Related Liabilities (Summary of Outstanding Claims by Year of Exposure and State Filed) (Details) - Claim | Jun. 30, 2017 | Dec. 31, 2016
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Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items] |  |
Claims outstanding | 56,000 | 55,500
Asbestos After 1964 [Member] |  |
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items] |  |
Claims outstanding |  | 16,000
Texas [Member] | Asbestos Before Or During 1964 [Member] |  |
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items] |  |
Claims outstanding |  | 13,000
Pennsylvania [Member] | Asbestos Before Or During 1964 [Member] |  |
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items] |  |
Claims outstanding |  | 2,000
Other States That Have Enacted Asbestos Legislation [Member] | Asbestos Before Or During 1964 [Member] |  |
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items] |  |
Claims outstanding |  | 6,000
Other States [Member] | Asbestos Before Or During 1964 [Member] |  |
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items] |  |
Claims outstanding |  | 18,500

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