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Shareholders' Equity - Class of Treasury Stock (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Treasury Stock Acquired, Average Cost Per Share | $ 137.99 | $ 170.88 | $ 139.75 | $ 191.47
Stock Repurchased and Retired During Period, Value | $ 250,036 | $ 250,000 | $ 290,041 | $ 500,023
October Twenty Six Two Thousand Ten Program |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Stock Repurchased and Retired During Period, Shares | 1,812 | 1,463 | 2,075 | 2,611

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