Equity - Narrative (Details) - USD ($)			1 Months Ended	12 Months Ended
	Feb. 02, 2022	May 25, 2021	May 31, 2024	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2024
Class of Stock [Line Items]
Repurchases of common stock					$ 0
Preferred stock, shares authorized (in shares)				5,000,000		5,000,000
Preferred stock, shares outstanding (in shares)				220,000		0
Common Stock
Class of Stock [Line Items]
Maximum number of shares authorized for repurchase (up to) (in shares)	8,000,000
Stock repurchase program period	4 years
Repurchases of common stock (in shares)				600,000	900,000
Repurchases of common stock				$ 22,000,000	$ 38,000,000
Capital Units | Preferred stock, without par value
Class of Stock [Line Items]
Units and shares sold (in shares)		2,200,000
Notional value		$ 220,000,000
Stated value (in dollars per share)		$ 100
Undivided beneficial ownership interest		10.00%
Liquidation preference (in dollars per share)		$ 1,000
Issuance of Preferred Stock, net of issuance costs		$ 213,000,000
Capital Units | Common Stock
Class of Stock [Line Items]
Equity unit received by each holder (in shares)			2.2973
Converted equity units (in shares)			5,054,030
Convertible Preferred Stock | Preferred stock, without par value
Class of Stock [Line Items]
Units and shares sold (in shares)		220,000