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Revolving and Other Lines of Credit and Notes Payable (Details) - USD ($)
Jun. 30, 2020
Jun. 30, 2019
Jun. 07, 2018
Notes Payable and Lines of Credit (Textual) [Abstract]      
Notes Payable $ 400,000 $ 200,000  
Twenty Eighteen Credit Agreement [Member] [Domain]      
Notes Payable and Lines of Credit (Textual) [Abstract]      
Line of Credit Facility, Maximum Borrowing Capacity     $ 700,000,000.0
Line of Credit Facility, Fair Value of Amount Outstanding 500,000,000.0 $ 0  
Notes Payable to Banks [Member]      
Notes Payable and Lines of Credit (Textual) [Abstract]      
Line of Credit Facility, Maximum Borrowing Capacity 92,200,000    
Line of Credit Facility Unused 200,000,000.0    
Line of Credit [Member]      
Notes Payable and Lines of Credit (Textual) [Abstract]      
Net Debt to EBITDA Ratio, domestic cash allowed to net debt, amount, minimum 25,000,000    
Net debt to EBITDA Ratio, Maximum 3.5    
Net Debt to EBITDA Ratio, allowable adjustment for cash restructuring charges, amount 80,000,000    
Consolidated Interest Coverage Ratio, Minimum $ 3.5    
Debt, Weighted Average Interest Rate 2.17%