Commitments And Contingencies (Asbestos Liability Narrative) (Details)	12 Months Ended
	Dec. 31, 2021 USD ($) claim	Dec. 31, 2020 USD ($) claim	Dec. 31, 2019 USD ($) claim	Dec. 31, 2018 claim	Aug. 21, 2012 USD ($)
Loss Contingencies [Line Items]
Pre-tax cash payments, net	$ 44,900,000	$ 31,100,000	$ 41,500,000
Estimated funds available from post bankruptcy trusts to pay current and future claimants	36,000,000,000
Current asbestos liability	62,300,000	$ 66,500,000
Aggregate value of policy buy out agreements	$ 82,500,000
Asbestos Commitments And Contingencies
Loss Contingencies [Line Items]
Pending claims | claim	29,958	29,138	29,056	29,089
Total costs incurred	$ 55,200,000	$ 50,900,000	$ 66,200,000
Pre-tax cash payments, net	$ 44,900,000	31,100,000	41,500,000
Asbestos cumulative claims resolved | claim	143,000
Related settlement cost incurred	$ 720,000,000
Cumulative asbestos settlement cost per resolved claim	5,000
Asbestos settlement cost per resolved claim	18,800	13,900	15,800
Increase in total asbestos liability			255,000,000
Asbestos liability	612,000,000	670,000,000	$ 712,000,000
Percentage of asbestos liability attributable to settlement and defense costs for future claims			85.00%
Current asbestos liability	62,300,000	66,500,000
Estimated percentage of insurance which covers asbestos costs			14.00%
Insurance receivable asbestos	$ 74,000,000	$ 87,000,000	$ 98,000,000
Asbestos Commitments And Contingencies | Ronald Dummitt
Loss Contingencies [Line Items]
Court judgment					$ 4,900,000
Asbestos Commitments And Contingencies | NEW YORK
Loss Contingencies [Line Items]
Pending claims | claim	18,000
Non-malignancy claims | claim	16,000