Consolidated Statements of Stockholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Balance (in shares) at Jun. 30, 2022		154.5
Beginning balance at Jun. 30, 2022	$ 1,919.1	$ 1.6	$ 1,344.7	$ 2,824.0	$ (2,024.8)	$ (226.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	572.2			630.6		(58.4)
Stock option exercises	43.2		43.2
Stock-based compensation	72.0		72.0
Treasury stock acquired	(24.3)				(24.3)
Treasury stock reissued	0.0		(23.1)		23.1
Common stock dividends	(341.6)			(341.6)
Balance (in shares) at Jun. 30, 2023		154.5
Ending balance at Jun. 30, 2023	2,240.6	$ 1.6	1,436.8	3,113.0	(2,026.1)	(284.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	651.1			698.1		(47.0)
Stock option exercises	72.0		72.0
Stock-based compensation	68.5		68.5
Treasury stock acquired	(488.1)				(488.1)
Treasury stock reissued	0.0		(24.9)		24.9
Common stock dividends	$ (376.0)			(376.0)
Balance (in shares) at Jun. 30, 2024	154.5	154.5
Ending balance at Jun. 30, 2024	$ 2,168.2	$ 1.6	1,552.5	3,435.1	(2,489.2)	(331.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	898.3			839.5		58.8
Stock option exercises	62.4		62.4
Stock-based compensation	70.4		70.4
Treasury stock acquired	(132.1)				(132.1)
Treasury stock reissued	0.0		(22.3)		22.3
Common stock dividends	$ (412.1)			(412.1)
Balance (in shares) at Jun. 30, 2025	154.5	154.5
Ending balance at Jun. 30, 2025	$ 2,655.1	$ 1.6	$ 1,663.0	$ 3,862.5	$ (2,599.0)	$ (272.9)