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Capital Stock (Tables) | 12 Months Ended
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Sep. 30, 2023
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 at September 30, 2020 | 158,064,750 |
Vesting of restricted stock units, net of shares withheld for taxes | 182,024 |
Exercise of stock options | 151,399 |
Exercise of employee stock purchase plan instruments | 146,135 |
Settlement of performance-based restricted stock units, net of shares withheld for taxes | 62,396 |
Stock repurchased under buyback program | (651,271) |
Shares outstanding at September 30, 2021 | 157,955,433 |
Vesting of restricted stock units, net of shares withheld for taxes | 195,156 |
Exercise of stock options | 36,731 |
Exercise of employee stock purchase plan instruments | 150,909 |
Settlement of performance-based restricted stock units, net of shares withheld for taxes | 160,163 |
Stock repurchased under buyback program | (2,654,254) |
Shares outstanding at 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 at September 30, 2023 | 155,871,932 |

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- Definition Tabular disclosure of the change in common stock outstanding. + References No definition available. + Details
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