Consolidated Statements Of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Net sales	$ 4,536.9	$ 4,907.7	$ 4,629.9	$ 3,957.9	$ 4,074.8	$ 4,373.2	$ 4,186.1	$ 3,606.4	$ 18,032.4	$ 16,240.5	$ 14,832.9
Cost of sales									14,992.5	13,533.6	12,382.7
Gross profit	777.5	816.5	773.8	672.1	693.8	713.6	695.6	603.9	3,039.9	2,706.9	2,450.2
Selling and administrative expenses									1,713.1	1,537.1	1,410.0
Advertising expense									193.2	182.5	173.7
Operating income	283.8	320.6	300.3	228.9	242.9	274.8	265.5	204.1	1,133.6	987.3	866.5
Interest expense, net									(159.4)	(148.6)	(150.5)
Other (expense) income, net									(24.5)	1.8	(55.3)
Income before income taxes									949.7	840.5	660.7
Income tax expense									(212.9)	(197.5)	(137.6)
Net income	$ 185.6	$ 201.7	$ 196.6	$ 152.9	$ 159.3	$ 183.7	$ 173.0	$ 127.0	$ 736.8	$ 643.0	$ 523.1
Net income per common share:
Earnings per share, basic (in dollars per share)	$ 1.29	$ 1.39	$ 1.35	$ 1.04	$ 1.07	$ 1.22	$ 1.14	$ 0.83	$ 5.08	$ 4.26	$ 3.37
Earnings per share, diluted (in dollars per share)	$ 1.27	$ 1.37	$ 1.33	$ 1.02	$ 1.05	$ 1.20	$ 1.12	$ 0.82	$ 4.99	$ 4.19	$ 3.31
Weighted Average Number of Shares Outstanding, Basic [Abstract]
Basic weighted-average shares outstanding (in shares)									145.1	150.9	155.4
Diluted weighted-average shares outstanding (in shares)									147.8	153.6	158.2