Consolidated Statements Of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Net sales	$ 4,074.8	$ 4,373.2	$ 4,186.1	$ 3,606.4	$ 3,752.1	$ 3,933.2	$ 3,891.7	$ 3,256.0	$ 16,240.5	$ 14,832.9	$ 13,672.7
Cost of sales									13,533.6	12,382.7	11,344.4
Gross profit	693.8	713.6	695.6	603.9	613.7	642.2	640.8	553.5	2,706.9	2,450.2	2,328.3
Selling and administrative expenses									1,537.1	1,410.0	1,345.4
Advertising expense									182.5	173.7	162.9
Operating income	242.9	274.8	265.5	204.1	221.1	244.0	230.8	170.7	987.3	866.5	820.0
Interest expense, net									(148.6)	(150.5)	(146.5)
Net loss on extinguishments of long-term debt									0.0	(57.4)	(2.1)
Other income, net									1.8	2.1	1.8
Income before income taxes									840.5	660.7	673.2
Income tax expense									(197.5)	(137.6)	(248.1)
Net income	$ 159.3	$ 183.7	$ 173.0	$ 127.0	$ 194.8	$ 129.3	$ 140.9	$ 58.2	$ 643.0	$ 523.1	$ 425.1
Net income per common share:
Earnings per share, basic (in dollars per share)	$ 1.07	$ 1.22	$ 1.14	$ 0.83	$ 1.28	$ 0.84	$ 0.90	$ 0.36	$ 4.26	$ 3.37	$ 2.60
Earnings per share, diluted (in dollars per share)	1.05	1.20	1.12	0.82	1.25	0.83	0.89	0.36	$ 4.19	$ 3.31	$ 2.56
Weighted Average Number of Shares Outstanding, Basic [Abstract]
Basic weighted-average shares outstanding (in shares)									150.9	155.4	163.6
Diluted weighted-average shares outstanding (in shares)									153.6	158.2	166.0
Cash dividends declared per common share (in dollars per share)	$ 0.295	$ 0.210	$ 0.210	$ 0.210	$ 0.210	$ 0.160	$ 0.160	$ 0.160	$ 0.9250	$ 0.6900	$ 0.4825