Stockholders' Equity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 5,752.2	$ 5,399.9
Net earnings	602.1	582.4
Other comprehensive income	30.7	23.4
Stock-based compensation expense	35.1	36.0
Issuances relating to stock compensation plans	44.8	65.0
Treasury stock acquired	$ (262.3)	$ (392.6)
Treasury stock acquired (shares)	1.7	1.9
Dividends declared (in US$ per share)	$ 0.91	$ 0.79
Dividends declared	$ (393.7)	$ (346.6)
Other		6.8
Ending balance	5,808.9	5,360.7
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	63.9	63.9
Net earnings	0.0	0.0
Other comprehensive income	0.0	0.0
Stock-based compensation expense	0.0	0.0
Issuances relating to stock compensation plans	0.0	0.0
Treasury stock acquired	0.0	0.0
Dividends declared	0.0	0.0
Other		0.0
Ending balance	63.9	63.9
Capital in Excess of Par Value
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	1,333.8	1,183.2
Net earnings	0.0	0.0
Other comprehensive income	0.0	0.0
Stock-based compensation expense	35.1	36.0
Issuances relating to stock compensation plans	(20.5)	(5.5)
Treasury stock acquired	0.0	0.0
Dividends declared	0.0	0.0
Other		0.0
Ending balance	1,348.4	1,213.7
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	18,436.3	17,500.6
Net earnings	602.1	582.4
Other comprehensive income	0.0	0.0
Stock-based compensation expense	0.0	0.0
Issuances relating to stock compensation plans	0.0	0.0
Treasury stock acquired	0.0	0.0
Dividends declared	(393.7)	(346.6)
Other		6.8
Ending balance	18,644.7	17,729.6
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(14,067.0)	(13,090.5)
Net earnings	0.0	0.0
Other comprehensive income	0.0	0.0
Stock-based compensation expense	0.0	0.0
Issuances relating to stock compensation plans	65.3	70.5
Treasury stock acquired	(262.3)	(392.6)
Dividends declared	0.0	0.0
Other		0.0
Ending balance	(14,264.0)	(13,412.6)
AOCI
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(14.8)	(257.3)
Net earnings	0.0	0.0
Other comprehensive income	30.7	23.4
Stock-based compensation expense	0.0	0.0
Issuances relating to stock compensation plans	0.0	0.0
Treasury stock acquired	0.0	0.0
Dividends declared	0.0	0.0
Other		0.0
Ending balance	$ 15.9	$ (233.9)