Commitments and Contingencies (Claims for Asbestos) (Details) - claims	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Claims outstanding at beginning of year	605	489
New claims filed	362	288
Pending claims concluded	(280)	(172)
Claims outstanding at end of year	687	605

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- Definition

The number of claims settled and dismissed during the period.

+ 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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- Definition

The total number of new claims filed pertaining to a loss contingency during the period.

+ References

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- Definition

Number of pending claims pertaining to a loss contingency.

+ References

+ Details

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