Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023
Preferred stock, par value	$ 0.01		$ 0.01
Preferred stock, authorized	50,000,000		50,000,000
Preferred stock, issued	0		0
Preferred stock, outstanding	0		0
Common stock, par value	$ 0.01		$ 0.01
Common stock, authorized	500,000,000		500,000,000
Common stock, issued	108,000,000		106,600,000
Common stock, outstanding		94,600,000	93,600,000
Treasury Stock, shares	13,400,000		13,000,000
Series A Convertible Preferred Stock
Preferred stock, par value	$ 0.01		$ 0.01
Preferred stock, issued	500,000		500,000
Preferred stock, outstanding	500,000		500,000
Percentage of Cumulative Dividend	7.00%		7.00%
Preferred stock, Liquidation Preference	$ 512.0		$ 503.2