Consolidated Statements of Stockholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment		Common Stock	Additional Paid-In Capital	Additional Paid-In Capital Cumulative Effect, Period of Adoption, Adjustment	[1]	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment		Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Cumulative Effect, Period of Adoption, Adjustment
Balance (in shares) at Jun. 30, 2018				154.5
Balance at Jun. 30, 2018	$ 1,094.3	$ 101.3	[1]	$ 1.6	$ 1,048.5	$ 0.0		$ 1,727.0	$ 102.8	[1]	$ (1,630.8)	$ (51.9)	$ (1.5)	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	464.3							482.1				(17.7)
Stock option exercises	31.3				31.3
Stock-based compensation	58.3				58.3
Treasury stock acquired	(397.8)										(397.8)
Treasury stock reissued	0.0				(28.8)						28.8
Common stock dividends	(224.2)							(224.2)
Balance (in shares) at Jun. 30, 2019				154.5
Balance at Jun. 30, 2019	1,127.5	$ 0.2	[2]	$ 1.6	1,109.3			2,087.7	$ 0.2	[2]	(1,999.8)	(71.2)	$ 0.0	[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			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

[1] Primarily reflects the adoption of accounting standards as described in Note 3, “Revenue Recognition.”

[2] Reflects the adoption of accounting standards as described in Note 2, “Summary of Significant Accounting Policies.”