Accounts Receivable Sale Program (Narrative) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Receivables [Abstract]
Maximum Limit Accounts Receivable Sale Program			$ 120,000,000.0
Trade Accounts Receivable Sold	$ 87,000,000.0	$ 77,900,000	166,300,000	$ 154,300,000
Amount Received From Trade Accounts Receivable Sold To Third Party	$ 86,800,000	$ 77,700,000	$ 166,000,000.0	$ 154,000,000.0