Contingencies (Schedule of Changes in Claims) (Details) - Asbestos Issue [Member] $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020 USD ($) claims	Dec. 31, 2019 USD ($) claims	Dec. 31, 2018 USD ($) claims	Dec. 31, 2017 USD ($) claims	Dec. 31, 2016 USD ($) claims	Dec. 31, 2015 USD ($) claims
Loss Contingency Accrual [Roll Forward]
Opening Number of Claims	3,708	3,684	3,730	3,745	3,791	3,821
Claims Dismissed, Settled, or Resolved	133	51	152	105	148	116
New Claims	41	75	106	90	102	86
Closing Number of Claims	3,616	3,708	3,684	3,730	3,745	3,791
Amounts Paid (thousands) to Settle or Resolve | $	$ 57	$ 25	$ 100	$ 55	$ 758	$ 164