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Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares shares in Millions	Mar. 31, 2026	Sep. 30, 2025
Statement of Financial Position [Abstract]
Preferred stock, par value (usd per share)	$ 0	$ 0
Preferred stock authorized (shares)	40.0	40.0
Preferred stock issued (shares)	0.0	0.0
Preferred stock outstanding (shares)	0.0	0.0
Common stock, par value (usd per share)	$ 0.01	$ 0.01
Common stock authorized (shares)	400.0	400.0
Common stock issued (shares)	127.5	127.1
Common stock outstanding (shares)	127.5	127.1

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Face amount or stated value per share of common stock.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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