Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2022	Sep. 30, 2021
Statement Of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, Authorized shares	500,000,000	500,000,000
Common stock, shares issued	107,024,000	113,138,000
Common stock, shares outstanding	106,970,000	112,913,000
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, Authorized shares	50,000,000	50,000,000
Preferred stock, shares issued	0	0