Financing Agreements (Schedule of Covenants) (Details) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	May 04, 2018 USD ($)	Dec. 31, 2017
Debt Instrument [Line Items]
Secured Net Leverage Ratio				4.00
Interest Coverage Ratio				3.50
Scenario, Forecast [Member]
Debt Instrument [Line Items]
Secured Net Leverage Ratio	3.00	3.50
Interest Coverage Ratio	4.00	3.75
Maximum [Member] | Scenario, Forecast [Member]
Debt Instrument [Line Items]
Accounts Receivable from Securitization			$ 0.0