Condensed Consolidated Statements of Earnings - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Net sales	$ 1,368.4	$ 1,267.9	$ 2,677.7	$ 2,453.7
Cost of sales	727.2	650.2	1,411.8	1,258.4
Gross profit	641.2	617.7	1,265.9	1,195.3
Operating and administrative expenses	366.7	349.3	730.3	692.0
Gain on sale of property and equipment	(0.5)	(0.6)	(0.8)	(0.2)
Operating income	275.0	269.0	536.4	503.5
Interest income	0.1	0.1	0.2	0.2
Interest expense	(3.7)	(3.2)	(7.7)	(5.9)
Earnings before income taxes	271.4	265.9	528.9	497.8
Income tax expense	66.8	54.7	130.2	112.3
Net earnings	$ 204.6	$ 211.2	$ 398.7	$ 385.5
Basic net earnings per share (in dollars per share)	$ 0.36	$ 0.37	$ 0.70	$ 0.67
Diluted net earnings per share (in dollars per share)	$ 0.36	$ 0.37	$ 0.69	$ 0.67
Basic weighted average shares outstanding (in shares)	573,159,138	574,280,852	572,669,693	574,783,228
Diluted weighted average shares outstanding (in shares)	574,551,349	574,514,974	573,775,059	575,118,936