Revenue (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Revenue [Abstract]
Net sales	$ 1,773,200,000	$ 1,777,800,000
Increase in retained earnings	708,500,000		$ 694,000,000.0
Total income tax provision	8,700,000	$ 13,000,000.0
Contract asset (liabilites)	$ 0		$ 0