Stockholders' Equity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 5,049.6	$ 5,900.0	$ 5,670.1	$ 5,752.2
Net earnings	928.5	810.7	2,323.4	2,060.3
Other comprehensive income	(933.9)	(298.0)	(1,272.9)	(242.9)
Stock-based compensation expense	42.7	38.8	129.9	114.5
Issuances relating to stock compensation plans	39.7	53.1	166.3	134.2
Treasury stock acquired	$ (497.9)	$ (433.9)	$ (1,553.9)	$ (955.3)
Treasury stock acquired (shares)	2.3	2.5	7.0	5.7
Dividends declared	$ (435.8)	$ (396.8)	$ (1,270.0)	$ (1,189.1)
Dividends declared (in US$ per share)	$ 1.04	$ 0.93	$ 3.01	$ 2.77
Ending balance	$ 4,192.9	$ 5,673.9	$ 4,192.9	$ 5,673.9
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	1,664.7	1,407.6	1,531.3	1,333.8
Stock-based compensation expense	42.7	38.8	129.9	114.5
Issuances relating to stock compensation plans	29.4	33.4	75.6	31.5
Ending balance	1,736.8	1,479.8	1,736.8	1,479.8
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	20,011.8	18,893.6	19,451.1	18,436.3
Net earnings	928.5	810.7	2,323.4	2,060.3
Dividends declared	(435.8)	(396.8)	(1,270.0)	(1,189.1)
Ending balance	20,504.5	19,307.5	20,504.5	19,307.5
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(16,362.4)	(14,505.4)	(15,386.8)	(14,067.0)
Issuances relating to stock compensation plans	10.3	19.7	90.7	102.7
Treasury stock acquired	(497.9)	(433.9)	(1,553.9)	(955.3)
Ending balance	(16,850.0)	(14,919.6)	(16,850.0)	(14,919.6)
AOCI
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(328.4)	40.3	10.6	(14.8)
Other comprehensive income	(933.9)	(298.0)	(1,272.9)	(242.9)
Ending balance	$ (1,262.3)	$ (257.7)	$ (1,262.3)	$ (257.7)