Contingencies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2012
Site Contingency [Line Items]
Proceeds from Legal Settlements			$ 110,000
Recovery of Direct Costs	$ 42,000
Sales covered by the Iran Threat Reduction and Syria Human Rights Act of 2012		$ 4,770
Global ECS [Member]
Loss Contingencies [Line Items]
Foreign tax and other loss contingencies, net of taxes	32,700
Huntsville Site [Member]
Site Contingency [Line Items]
Environmental Remediation Expense To Date	7,100
Additional Expected Project Expenditures Low Estimate	3,300
Additional Expected Project Expenditures High Estimate	10,000
Norco Site [Member] | Groundwater Removal [Member]
Site Contingency [Line Items]
Environmental Remediation Expense To Date	76,000
Additional Expected Project Expenditures Low Estimate	5,900
Additional Expected Project Expenditures High Estimate	$ 17,000