Commitments and Contingencies Asbestos Claimant and Settlement (Details) - Asbestos [Member]	9 Months Ended	12 Months Ended
	Sep. 30, 2021 USD ($) claimants	Dec. 31, 2020 USD ($) claimants	Dec. 31, 2019 claimants
Loss Contingencies [Line Items]
Loss Contingency, Pending Claims, Number	4,709	4,655	4,759
Loss Contingency, New Claims Filed, Number	171	219
Loss Contingency, Claims Dismissed, Number	89	287
Loss Contingency, Claims Settled, Number	28	36
Average settlement amount per claim during period | $	$ 11,632	$ 18,314
Legal Fees | $	$ 1,560,000	$ 2,130,000