Accounts Receivable Sale Program (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017
Receivables [Abstract]
Maximum Limit Accounts Receivable Sale Program		$ 40.0
Trade Accounts Receivable Sold	$ 40.0	105.0
Amount Received From Trade Accounts Receivable Sold To Third Party	39.9	104.8
Loss on sale of accounts receivable resulting from discount	$ 0.1	$ 0.2