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Capital Stock (Tables) | 12 Months Ended
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Sep. 30, 2025
Common Stock, Number of Shares, Par Value and Other Disclosure [Abstract] |
Schedule of Common Stock Outstanding Roll Forward [Table Text Block] | Common stock share activity is presented below:
Shares outstanding as of September 30, 2022 | 155,844,138 |
Vesting of restricted stock units, net of shares withheld for taxes | 256,724 |
Exercise of stock options | 110,989 |
Exercise of employee stock purchase plan instruments | 181,483 |
Settlement of performance-based restricted stock units, net of shares withheld for taxes | 193,428 |
Stock repurchased under buyback program | (714,830) |
Shares outstanding as of September 30, 2023 | 155,871,932 |
Vesting of restricted stock units, net of shares withheld for taxes | 207,986 |
Exercise of stock options | 517,839 |
Exercise of employee stock purchase plan instruments | 129,356 |
Settlement of performance-based restricted stock units, net of shares withheld for taxes | 136,846 |
Stock repurchased under buyback program | (636,789) |
Shares outstanding as of September 30, 2024 | 156,227,170 |
Vesting of restricted stock units, net of shares withheld for taxes | 206,139 |
Exercise of stock options | 246,577 |
Exercise of employee stock purchase plan instruments | 92,590 |
Settlement of performance-based restricted stock units, net of shares withheld for taxes | 150,081 |
Stock repurchased under buyback program | (591,553) |
Shares outstanding as of September 30, 2025 | 156,331,004 |

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