Consolidated Statements Of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Net sales	$ 3,994.4	$ 3,664.6	$ 7,319.1	$ 6,781.3
Cost of sales	3,353.3	3,054.1	6,125.5	5,646.3
Gross profit	641.1	610.5	1,193.6	1,135.0
Selling and administrative expenses	363.5	344.7	710.9	674.0
Advertising expense	46.5	42.3	81.8	76.5
Income from operations	231.1	223.5	400.9	384.5
Interest expense, net	(35.9)	(36.9)	(75.6)	(75.0)
Net loss on extinguishments of long-term debt	0.0	0.0	(57.4)	0.0
Other income	0.3	0.9	1.3	1.9
Income before income taxes	195.5	187.5	269.2	311.4
Income tax benefit (expense)	(54.5)	(70.0)	(70.5)	(116.1)
Net income	$ 141.0	$ 117.5	$ 198.7	$ 195.3
Net income per common share:
Basic (in dollars per share)	$ 0.90	$ 0.71	$ 1.26	$ 1.18
Diluted (in dollars per share)	$ 0.89	$ 0.70	$ 1.23	$ 1.16
Weighted-average common shares outstanding:
Basic (in shares)	156.0	164.9	157.7	166.1
Diluted (in shares)	159.0	166.7	160.9	167.8
Cash dividends declared per common share (in dollars per share)	$ 0.1600	$ 0.1075	$ 0.3200	$ 0.2150