Stockholders' Equity (Notes)	12 Months Ended
	Sep. 30, 2022
Stockholders' Equity Attributable to Parent [Abstract]
Stockholders' Equity Note Disclosure [Text Block]	Stockholders' EquityThe Company has an effective shelf registration statement filed with the Securities and Exchange Commission in October 2021 registering $750 million of equity securities, of which $300 million was reserved for sales under the at-the-market equity offering program that became effective in November 2021. In fiscal 2022, the Company issued 84,547 shares of common stock under its at-the-market equity offering program for proceeds of $1.7 million, net of commissions and other issuance costs totaling $0.1 million. At September 30, 2022, $748.2 million remained available for issuance under the shelf registration statement, of which $298.2 million was reserved for sales under the at-the-market equity offering program.