Environmental and Legal Contingencies (Details 3)		3 Months Ended		6 Months Ended
		Jun. 30, 2019 USD ($) claims-lawsuits	Jun. 30, 2018 USD ($) claims-lawsuits	Jun. 30, 2019 USD ($) claims-lawsuits defendants plaintiffs	Jun. 30, 2018 USD ($) claims-lawsuits	Jun. 14, 2019 USD ($)
Information on pending asbestos cases [Line Items]
Loss Contingency, Jointly And Severally Liable In Litigation | $						$ 8,100,000
Asbestos Claims With Specific Dollar Claim For Damages [Member]
Information on pending asbestos cases [Line Items]
Number of asbestos cases pending | claims-lawsuits	[1]	183		183
Claims with specific dollar claims for damages [Abstract]
Asbestos Lawsuits Pending With Dollars Number Of Plaintiffs | plaintiffs				2,258
Asbestos Lawsuits Pending With Dollars Number Of Defendants | defendants				20,541
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 | claims-lawsuits		176		176
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 | claims-lawsuits		4		4
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 | claims-lawsuits		3		3
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 | claims-lawsuits		174		174
Asbestos Issue [Member]
Information on pending asbestos cases [Line Items]
Number of asbestos cases pending | claims-lawsuits		357		357
Claims with specific dollar claims for damages [Abstract]
New Claims Filed | claims-lawsuits		27	21	38	33
Pending Claims Disposed Of | claims-lawsuits		17	31	24	42
Total Amount Paid in Settlements | $		$ 1,300,000	$ 400,000	$ 1,500,000	$ 700,000

[1] Involve a total of 2,258 plaintiffs and 20,541 defendants