Commitments and Contingencies Asbestos Narrative (Details) - Asbestos [Member]	3 Months Ended		9 Months Ended	30 Months Ended	351 Months Ended
	Jun. 30, 2020 USD ($)	Mar. 31, 2019 USD ($) claimants	Sep. 30, 2020 USD ($) claimants cases	Jun. 30, 2020 USD ($) claimants	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($) claimants	Dec. 31, 2018 claimants
Loss Contingencies [Line Items]
Liabilities Subject to Compromise, Asbestos Obligations			$ 29,400,000
Loss Contingency, Pending Cases, Number | cases			374
Loss Contingency, Pending Claims, Number | claimants			4,693			4,759	4,820
Total settlement costs					$ 9,900,000
Loss Contingency, New Claims Filed, Number | claimants		143	159
Percentage of settlement and defense costs covered by insurance					40.00%
Legal Fees		$ 2,250,000	$ 1,580,000
Minimum [Member]
Loss Contingencies [Line Items]
Liabilities Subject to Compromise, Asbestos Obligations						$ 31,500,000
Loss Contingency, New Claims Filed, Number | claimants				143
Legal Fees				$ 2,200,000
Maximum [Member]
Loss Contingencies [Line Items]
Liabilities Subject to Compromise, Asbestos Obligations						$ 43,300,000
Loss Contingency, New Claims Filed, Number | claimants				173
Legal Fees				$ 2,300,000
Compensatory Only Damages [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Number of pending claims seeking specific amounts of damages | claimants			56
Selling, General and Administrative Expenses [Member]
Loss Contingencies [Line Items]
Impact of change in accounting principle	$ 23,400,000