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Capital Stock (Tables) | 12 Months Ended
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Sep. 30, 2022
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, 2019 | 157,462,140 |
Vesting of restricted stock units, net of shares withheld for taxes | 242,112 |
Exercise of stock options | 534,291 |
Exercise of employee stock purchase plan instruments | 182,971 |
Settlement of performance-based restricted stock units, net of shares withheld for taxes | 61,610 |
Stock repurchased under buyback program | (418,374) |
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 |
The Company has authorized 20.0 million shares of $0.01 par value preferred stock. The preferred stock may be issued in one or more series and with such designations and preferences for each series as shall be stated in the resolutions providing for the designation and issue of each such series adopted by the Board of Directors of the Company. The Board of Directors is authorized by the Company's articles of incorporation to determine the voting, dividend, redemption and liquidation preferences pertaining to each such series. No shares of preferred stock have been issued by the Company as of September 30, 2022.

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