Condensed Consolidated Statements of Earnings - USD ($) $ 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	$ 1,121.5	$ 1,014.3	$ 2,169.2	$ 2,001.0
Cost of sales	563.0	512.7	1,092.7	1,007.9
Gross profit	558.5	501.6	1,076.5	993.1
Operating and administrative expenses	321.6	292.6	627.5	582.8
Gain on sale of property and equipment	(0.6)	(0.2)	(1.0)	(0.1)
Operating income	237.5	209.2	450.0	410.4
Interest income	0.1	0.1	0.2	0.2
Interest expense	(2.2)	(1.5)	(3.9)	(2.9)
Earnings before income taxes	235.4	207.8	446.3	407.7
Income tax expense	86.5	76.3	163.2	150.0
Net earnings	$ 148.9	$ 131.5	$ 283.1	$ 257.7
Basic net earnings per share (in dollars per share)	$ 0.52	$ 0.46	$ 0.98	$ 0.89
Diluted net earnings per share (in dollars per share)	$ 0.52	$ 0.45	$ 0.98	$ 0.89
Basic weighted average shares outstanding (in shares)	288,655,020	288,918,945	288,948,734	288,863,482
Diluted weighted average shares outstanding (in shares)	288,788,963	289,119,470	289,099,316	289,132,302