Consolidated Statements of Earnings - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Net sales	$ 5,333.7	$ 4,965.1	$ 4,390.5
Cost of sales	2,818.3	2,566.2	2,226.9
Gross profit	2,515.4	2,398.9	2,163.6
Operating and administrative expenses	1,459.4	1,400.2	1,282.8
Gain on sale of property and equipment	(1.2)	(0.5)	(1.0)
Operating income	1,057.2	999.2	881.8
Interest income	0.4	0.4	0.4
Interest expense	(13.9)	(12.6)	(9.1)
Earnings before income taxes	1,043.7	987.0	873.1
Income tax expense	252.8	235.1	294.5
Net earnings	$ 790.9	$ 751.9	$ 578.6
Basic net earnings per share (in dollars per share)	$ 1.38	$ 1.31	$ 1.00
Diluted net earnings per share (in dollars per share)	$ 1.38	$ 1.31	$ 1.00
Basic weighted average shares outstanding (in shares)	573,202,152	573,933,834	576,416,870
Diluted weighted average shares outstanding (in shares)	574,441,628	574,325,528	576,685,466