Earnings (Loss) per Common Share - Schedule of Awards Issued Under Share-Based Compensation Plans Excluded From the Calculations of Diluted Earnings (Loss) per Share (Details) - shares shares in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Stock options
Awards issued under share-based compensation plans that were excluded from calculations of diluted earnings per share because their effects were anti-dilutive
Stock options (in shares)	0.0	1.7	0.0	1.8