Stockholders' Equity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 5,350.7	$ 5,808.9	$ 5,670.1	$ 5,752.2
Net earnings	694.4	647.5	1,394.9	1,249.6
Other comprehensive income	(205.5)	24.4	(339.0)	55.1
Stock-based compensation expense	47.6	40.6	87.0	75.7
Issuances relating to stock compensation plans	58.4	36.3	126.8	81.1
Treasury stock acquired	$ (458.6)	$ (259.1)	$ (1,056.0)	$ (521.4)
Treasury stock acquired (shares)	2.0	1.6	4.6	3.2
Dividends declared	$ (437.4)	$ (398.6)	$ (834.2)	$ (792.3)
Dividends declared (in US$ per share)	$ 1.04	$ 0.93	$ 1.97	$ 1.84
Ending balance	$ 5,049.6	$ 5,900.0	$ 5,049.6	$ 5,900.0
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	1,579.1	1,348.4	1,531.3	1,333.8
Stock-based compensation expense	47.6	40.6	87.0	75.7
Issuances relating to stock compensation plans	38.0	18.6	46.4	(1.9)
Ending balance	1,664.7	1,407.6	1,664.7	1,407.6
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	19,754.8	18,644.7	19,451.1	18,436.3
Net earnings	694.4	647.5	1,394.9	1,249.6
Dividends declared	(437.4)	(398.6)	(834.2)	(792.3)
Ending balance	20,011.8	18,893.6	20,011.8	18,893.6
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(15,924.2)	(14,264.0)	(15,386.8)	(14,067.0)
Issuances relating to stock compensation plans	20.4	17.7	80.4	83.0
Treasury stock acquired	(458.6)	(259.1)	(1,056.0)	(521.4)
Ending balance	(16,362.4)	(14,505.4)	(16,362.4)	(14,505.4)
AOCI
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(122.9)	15.9	10.6	(14.8)
Other comprehensive income	(205.5)	24.4	(339.0)	55.1
Ending balance	$ (328.4)	$ 40.3	$ (328.4)	$ 40.3