Consolidated Statements Of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Net sales	$ 4,389.2	$ 3,957.9
Cost of sales	3,632.7	3,285.8
Gross profit	756.5	672.1
Selling and administrative expenses	510.7	443.2
Operating income	245.8	228.9
Interest expense, net	(37.9)	(38.3)
Other income, net	3.9	1.0
Income before income taxes	211.8	191.6
Income tax expense	(43.9)	(38.7)
Net income	$ 167.9	$ 152.9
Net income per common share:
Basic (in dollars per share)	$ 1.18	$ 1.04
Diluted (in dollars per share)	$ 1.16	$ 1.02
Weighted-average common shares outstanding:
Basic (in shares)	142.7	147.0
Diluted (in shares)	144.9	149.2