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Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Millions, $ in Millions | Sep. 30, 2025 | Sep. 30, 2024
--- | --- | ---
Statement of Financial Position [Abstract] |  |
Accounts receivable, allowances | $ 12.0 | $ 9.6
Common shares, stated value per share (USD per share) | $ 0.01 | $ 0.01
Common shares outstanding (in shares) | 57.8 | 57.1
Treasury shares, at cost (in shares) | 10.4 | 11.0

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