Consolidated Statements Of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Net sales	$ 4,629.9	$ 4,186.1	$ 8,587.8	$ 7,792.5
Cost of sales	3,856.1	3,490.5	7,141.9	6,493.0
Gross profit	773.8	695.6	1,445.9	1,299.5
Selling and administrative expenses	420.4	381.4	824.4	744.1
Advertising expense	53.1	48.7	92.3	85.8
Operating income	300.3	265.5	529.2	469.6
Interest expense, net	(40.5)	(37.2)	(78.8)	(74.9)
Other income, net	1.4	1.5	2.4	0.8
Income before income taxes	261.2	229.8	452.8	395.5
Income tax expense	(64.6)	(56.8)	(103.3)	(95.5)
Net income	$ 196.6	$ 173.0	$ 349.5	$ 300.0
Net income per common share:
Basic (in dollars per share)	$ 1.35	$ 1.14	$ 2.39	$ 1.98
Diluted (in dollars per share)	$ 1.33	$ 1.12	$ 2.35	$ 1.94
Weighted-average common shares outstanding:
Basic (in shares)	145.7	151.6	146.3	151.9
Diluted (in shares)	148.3	153.9	148.7	154.4