Condensed Consolidated Statements of Earnings - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Net sales	$ 1,309.3	$ 1,185.8
Cost of sales	684.6	608.2
Gross profit	624.7	577.6
Operating and administrative expenses	363.6	342.7
(Gain) loss on sale of property and equipment	(0.3)	0.4
Operating income	261.4	234.5
Interest income	0.1	0.1
Interest expense	(4.0)	(2.7)
Earnings before income taxes	257.5	231.9
Income tax expense	63.4	57.6
Net earnings	$ 194.1	$ 174.3
Basic net earnings per share (in dollars per share)	$ 0.68	$ 0.61
Diluted net earnings per share (in dollars per share)	$ 0.68	$ 0.61
Basic weighted average shares outstanding (in shares)	286,086,301	287,642,801
Diluted weighted average shares outstanding (in shares)	286,496,981	287,875,763