Environmental and Legal Contingencies (Details 3)		3 Months Ended		9 Months Ended
		Sep. 30, 2017 USD ($) claims-lawsuits	Sep. 30, 2016 USD ($) claims-lawsuits	Sep. 30, 2017 USD ($) claims-lawsuits defendants plaintiffs	Sep. 30, 2016 USD ($) claims-lawsuits
Asbestos Claims With Specific Dollar Claim For Damages [Member]
Information on pending asbestos cases [Line Items]
Number of asbestos cases pending	[1]	138		138
Claims with specific dollar claims for damages [Abstract]
Asbestos Lawsuits Pending With Dollars Number Of Plaintiffs | plaintiffs				2,240
Asbestos Lawsuits Pending With Dollars Number Of Defendants | defendants				17,588
Asbestos Claims With Specific Dollar Claim For Damages [Member] | Asbestos Claims of Range 1 [Member]
Information on pending asbestos cases [Line Items]
Number of asbestos cases pending		131		131
Claims with specific dollar claims for damages [Abstract]
Amount claimed per plaintiff, lower range | $				$ 0
Amount claimed per plaintiff, upper range | $				$ 200,000
Asbestos Claims With Specific Dollar Claim For Damages [Member] | Asbestos Claims of Range 2 [Member]
Information on pending asbestos cases [Line Items]
Number of asbestos cases pending		5		5
Claims with specific dollar claims for damages [Abstract]
Amount claimed per plaintiff, lower range | $				$ 200,000
Amount claimed per plaintiff, upper range | $				$ 5,000,000
Asbestos Claims With Specific Dollar Claim For Damages [Member] | Asbestos Claims of Range 3 [Member]
Information on pending asbestos cases [Line Items]
Number of asbestos cases pending		2		2
Claims with specific dollar claims for damages [Abstract]
Amount claimed per plaintiff, lower range | $				$ 5,000,000
Amount claimed per plaintiff, upper range | $				$ 20,000,000
Asbestos Claims Without Specific Dollar Claim For Damages [Member]
Information on pending asbestos cases [Line Items]
Number of asbestos cases pending		196		196
Asbestos Issue [Member]
Information on pending asbestos cases [Line Items]
Number of asbestos cases pending		334		334
Claims with specific dollar claims for damages [Abstract]
New Claims Filed		18	10	46	33
Pending Claims Disposed Of		27	27	51	75
Total Amount Paid in Settlements | $		$ 300,000	$ 300,000	$ 900,000	$ 700,000

[1] Involve a total of 2,240 plaintiffs and 17,588 defendants