Weighted-Average Shares Outstanding - Denominators of Basic and Diluted EPS Computations (Details) - shares shares in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Weighted-average shares outstanding:
Basic (in shares)	116.6	115.7	116.4	115.5
Common stock equivalents (in shares)	2.0	2.1	2.1	2.1
Diluted (in shares)	118.7	117.8	118.5	117.6