Accounts Receivable Sale Program (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Receivables [Abstract]
Maximum Limit Accounts Receivable Sale Program	$ 80.0
Trade Accounts Receivable Sold	160.0	$ 145.0
Amount Received From Trade Accounts Receivable Sold To Third Party	$ 159.5	$ 144.7