Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares shares in Millions	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Statement of Stockholders' Equity [Abstract]
Treasury stock acquired (in shares)	0.2	0.1	0.1
Treasury stock reissued (in shares)	1.0	1.3	1.2
Dividends declared (in dollars per share)	$ 2.90	$ 2.56	$ 2.30