Commitments and Contingencies Asbestos Narrative (Details) - Asbestos [Member]	3 Months Ended	6 Months Ended	12 Months Ended	30 Months Ended	351 Months Ended
	Jun. 30, 2020 USD ($) claimants cases	Jun. 30, 2020 USD ($) claimants cases	Dec. 31, 2018 USD ($) claimants	Jun. 30, 2020 USD ($) claimants cases	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($) claimants
Loss Contingencies [Line Items]
Liabilities Subject to Compromise, Asbestos Obligations	$ 30,300,000	$ 30,300,000		$ 30,300,000
Loss Contingency, Pending Cases, Number | cases	352	352		352
Loss Contingency, Pending Claims, Number | claimants	4,732	4,732	4,820	4,732		4,759
Total settlement costs					$ 9,800,000
Loss Contingency, New Claims Filed, Number | claimants		110	143
Percentage of settlement and defense costs covered by insurance					40.00%
Legal Fees		$ 1,090,000	$ 2,250,000
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	55	55		55
Selling, General and Administrative Expenses [Member]
Loss Contingencies [Line Items]
Impact of change in accounting principle	$ 23,400,000