Stockholders' Equity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 5,900.0	$ 5,364.4	$ 5,752.2	$ 5,399.9
Net earnings	810.7	820.9	2,060.3	2,054.9
Other comprehensive income	(298.0)	(3.2)	(242.9)	22.9
Stock-based compensation expense	38.8	30.8	114.5	98.1
Issuances relating to stock compensation plans	53.1	53.6	134.2	141.7
Treasury stock acquired	$ (433.9)	$ (383.8)	$ (955.3)	$ (1,087.8)
Treasury stock acquired (shares)	2.5	2.5	5.7	6.2
Dividends declared	$ (396.8)	$ (392.0)	$ (1,189.1)	$ (1,132.1)
Dividends declared (in US$ per share)	$ 0.93	$ 0.91	$ 2.77	$ 2.61
Other				$ (6.9)
Ending balance	$ 5,673.9	$ 5,490.7	$ 5,673.9	5,490.7
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	63.9	63.9	63.9	63.9
Ending balance	63.9	63.9	63.9	63.9
Capital in Excess of Par Value
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	1,407.6	1,253.7	1,333.8	1,183.2
Stock-based compensation expense	38.8	30.8	114.5	98.1
Issuances relating to stock compensation plans	33.4	30.6	31.5	33.8
Ending balance	1,479.8	1,315.1	1,479.8	1,315.1
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	18,893.6	17,987.6	18,436.3	17,500.6
Net earnings	810.7	820.9	2,060.3	2,054.9
Dividends declared	(396.8)	(392.0)	(1,189.1)	(1,132.1)
Other				(6.9)
Ending balance	19,307.5	18,416.5	19,307.5	18,416.5
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(14,505.4)	(13,709.6)	(14,067.0)	(13,090.5)
Issuances relating to stock compensation plans	19.7	23.0	102.7	107.9
Treasury stock acquired	(433.9)	(383.8)	(955.3)	(1,087.8)
Ending balance	(14,919.6)	(14,070.4)	(14,919.6)	(14,070.4)
AOCI
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	40.3	(231.2)	(14.8)	(257.3)
Other comprehensive income	(298.0)	(3.2)	(242.9)	22.9
Ending balance	$ (257.7)	$ (234.4)	$ (257.7)	$ (234.4)