Consolidated Statements of Stockholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-In Capital	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Balance (in shares) at Jun. 30, 2019			154.5
Balance at Jun. 30, 2019	$ 1,127.5	$ 0.2	$ 1.6	$ 1,109.3	$ 2,087.7	$ 0.2	$ (1,999.8)	$ (71.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	433.3				462.5			(29.2)
Stock option exercises	42.1			42.1
Stock-based compensation	60.6			60.6
Treasury stock acquired	(69.3)						(69.3)
Treasury stock reissued	0.0			(33.5)			33.5
Common stock dividends	(247.8)				(247.8)
Balance (in shares) at Jun. 30, 2020			154.5
Balance at Jun. 30, 2020	1,346.5		$ 1.6	1,178.5	2,302.6		(2,035.7)	(100.4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	657.2				547.5			109.7
Stock option exercises	35.0			35.0
Stock-based compensation	58.2			58.2
Treasury stock acquired	(21.5)						(21.5)
Treasury stock reissued	0.0			(26.2)			26.2
Common stock dividends	$ (266.3)				(266.3)
Balance (in shares) at Jun. 30, 2021	154.5		154.5
Balance at Jun. 30, 2021	$ 1,809.1		$ 1.6	1,245.5	2,583.8		(2,030.9)	9.2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	303.6				539.1			(235.6)
Stock option exercises	60.3			60.3
Stock-based compensation	67.8			67.8
Treasury stock acquired	(22.8)						(22.8)
Treasury stock reissued	0.0			(28.9)			28.9
Common stock dividends	$ (298.9)				(298.9)
Balance (in shares) at Jun. 30, 2022	154.5		154.5
Balance at Jun. 30, 2022	$ 1,919.1		$ 1.6	$ 1,344.7	$ 2,824.0		$ (2,024.8)	$ (226.3)