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Lines of Credit and Financing Arrangements (Foreign Obligations) (Details) - USD ($)
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Short-term Debt [Line Items]      
Short-term debt borrowings $ 0 $ 4,600,000  
Repayments on facilities 0 $ 4,600,000  
Foreign Obligations [Member]      
Short-term Debt [Line Items]      
Short-term Debt 0   $ 0
Short-term debt borrowings 0    
Repayments on facilities $ 0