Summary of Significant Accounting Policies - Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Accounting Policies [Abstract]
Net earnings	$ 2,598.5	$ 2,466.5	$ 2,292.8
Basic weighted average shares outstanding (in shares)	426.3	430.8	435.0
Effect of Employee Stock Option Shares	0.8	0.9	1.0
Effect of Employee Restricted Stock Shares	1.0	1.0	1.6
Diluted weighted average shares outstanding (in shares)	428.1	432.7	437.6
EPS from continuing operations, Basic (in dollars per share)	$ 6.10	$ 5.73	$ 5.27
EPS from continuing operations, Diluted (in dollars per share)	$ 6.07	$ 5.70	$ 5.24