Consolidated Statements Of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Net sales	$ 3,957.9	$ 3,606.4
Cost of sales	3,285.8	3,002.5
Gross profit	672.1	603.9
Selling and administrative expenses	404.0	362.7
Advertising expense	39.2	37.1
Operating income	228.9	204.1
Interest expense, net	(38.3)	(37.7)
Other income (expense), net	1.0	(0.7)
Income before income taxes	191.6	165.7
Income tax expense	(38.7)	(38.7)
Net income	$ 152.9	$ 127.0
Net income per common share:
Basic (in dollars per share)	$ 1.04	$ 0.83
Diluted (in dollars per share)	$ 1.02	$ 0.82
Weighted-average common shares outstanding:
Basic (in shares)	147.0	152.2
Diluted (in shares)	149.2	154.8