Consolidated Statements Of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Net sales	$ 4,373.2	$ 3,933.2	$ 12,165.7	$ 11,080.8
Cost of sales	3,659.6	3,291.0	10,152.6	9,244.3
Gross profit	713.6	642.2	2,013.1	1,836.5
Selling and administrative expenses	390.7	351.9	1,134.8	1,062.8
Advertising expense	48.1	46.3	133.9	128.1
Income from operations	274.8	244.0	744.4	645.6
Interest expense, net	(36.6)	(37.8)	(111.5)	(113.4)
Net loss on extinguishments of long-term debt	0.0	0.0	0.0	(57.4)
Other income, net	0.2	0.7	1.0	1.9
Income before income taxes	238.4	206.9	633.9	476.7
Income tax expense	(54.7)	(77.6)	(150.2)	(148.4)
Net income	$ 183.7	$ 129.3	$ 483.7	$ 328.3
Net income per common share:
Basic (in dollars per share)	$ 1.22	$ 0.84	$ 3.19	$ 2.10
Diluted (in dollars per share)	$ 1.20	$ 0.83	$ 3.14	$ 2.06
Weighted-average common shares outstanding:
Basic (in shares)	150.9	153.8	151.6	156.3
Diluted (in shares)	153.7	156.2	154.1	159.2
Cash dividends declared per common share (in dollars per share)	$ 0.2100	$ 0.1600	$ 0.6300	$ 0.4800