Summary of Significant Accounting Policies - Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2024
Accounting Policies [Abstract]
Basic and diluted, net earnings	$ 4,413.5	$ 4,079.7	$ 3,752.0
Basic, weighted shares (in shares)	402.3	407.1	410.6
Effect of employee stock option shares, weighted average shares (in shares)	0.3	0.6	0.7
Effect of employee restricted stock shares, weighted average shares (in shares)	0.7	1.0	0.9
Diluted, weighted average shares (in shares)	403.3	408.7	412.2
Basic, EPS (in dollars per share)	$ 10.97	$ 10.02	$ 9.14
Diluted, EPS (in dollars per share)	$ 10.94	$ 9.98	$ 9.10