Lines of Credit and Financing Arrangements (Credit Facility Ratios) (Details) - Revolving Credit Facility [Member]	9 Months Ended
	Sep. 30, 2020
Maximum [Member]
Line of Credit Facility [Line Items]
Consolidated Indebtedness to Adjusted EBITDA Ratio no greater than	3.5
Cash Flow to Net Interest Expense Ratio no less than	3.0
Minimum [Member]
Line of Credit Facility [Line Items]
Consolidated Indebtedness to Adjusted EBITDA Ratio no greater than	1.0
Cash Flow to Net Interest Expense Ratio no less than	1.0