Consolidated Statements Of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Net sales	$ 3,838.6	$ 4,033.9	$ 3,994.4	$ 3,324.7	$ 3,492.4	$ 3,708.2	$ 3,664.6	$ 3,116.7	$ 15,191.5	$ 13,981.9	$ 12,988.7
Cost of sales									12,741.6	11,654.7	10,872.9
Gross profit	614.4	642.0	641.1	552.6	577.9	614.3	610.5	524.5	2,449.9	2,327.2	2,115.8
Selling and administrative expenses									1,410.1	1,345.1	1,226.0
Advertising expense									173.7	162.9	147.8
Income from operations	221.6	243.7	231.1	169.8	197.2	237.5	223.5	161.0	866.1	819.2	742.0
Interest expense, net									(150.5)	(146.5)	(159.5)
Net loss on extinguishments of long-term debt									(57.4)	(2.1)	(24.3)
Gain on remeasurement of equity investment									0.0	0.0	98.1
Other income (expense), net									2.1	1.8	(9.3)
Income before income taxes									660.3	672.4	647.0
Income tax expense									(137.3)	(248.0)	(243.9)
Net income	$ 195.2	$ 129.2	$ 141.0	$ 57.6	$ 103.2	$ 125.9	$ 117.5	$ 77.8	$ 523.0	$ 424.4	$ 403.1
Net income per common share:
Earnings per share, basic (in dollars per share)	$ 1.28	$ 0.84	$ 0.90	$ 0.36	$ 0.64	$ 0.78	$ 0.71	$ 0.47	$ 3.37	$ 2.59	$ 2.37
Earnings per share, diluted (in dollars per share)	1.26	0.83	0.89	0.35	0.63	0.76	0.70	0.46	$ 3.31	$ 2.56	$ 2.35
Weighted Average Number of Shares Outstanding, Basic [Abstract]
Basic weighted-average shares outstanding (in shares)									155.4	163.6	170.3
Diluted weighted-average shares outstanding (in shares)									158.2	166.0	171.8
Cash dividends declared per common share (in dollars per share)	$ 0.2100	$ 0.1600	$ 0.1600	$ 0.1600	$ 0.1600	$ 0.1075	$ 0.1075	$ 0.1075	$ 0.6900	$ 0.4825	$ 0.3100