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SHAREHOLDER’S EQUITY - Narrative (Details) - USD ($) $ / shares in Units, shares in Thousands |  |  |  | 12 Months Ended | 15 Months Ended
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May 04, 2021 | Feb. 24, 2020 | Nov. 18, 2019 | Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2020 | Feb. 24, 2020
Accelerated Share Repurchases [Line Items] |  |  |  |  |  |  |
Authorized share repurchase amount | $ 1,000,000,000 |  |  |  |  |  |
Share repurchase program, authorization period | 36 months |  |  |  |  |  |
Number of shares repurchased (in shares) |  |  |  | 1,400 | 1,600 | 6,200 |
Total repurchase amount |  |  |  |  | $ 125,800,000 |  |
Average price per share (in dollars per share) |  |  |  | $ 97.34 | $ 81.43 | $ 58.57 |
10b5-1 Repurchase |  |  |  |  |  |  |
Accelerated Share Repurchases [Line Items] |  |  |  |  |  |  |
Authorized share repurchase amount |  |  |  |  | $ 150,000,000 |  |
ASR |  |  |  |  |  |  |
Accelerated Share Repurchases [Line Items] |  |  |  |  |  |  |
Accelerated share repurchase amount |  |  | $ 125,000,000 |  |  |  |
Number of shares repurchased (in shares) |  | 300 | 1,700 | 0 | 0 | 2,000 | 2,000
Percentage of company total shares |  |  | 85.00% |  |  |  |
Total repurchase amount |  | $ 18,500,000 | $ 106,300,000 |  |  |  |
Adjustment to additional paid-in capital |  |  | $ 18,700,000 |  |  |  |
Average price per share (in dollars per share) |  |  |  | $ 0 | $ 0 | $ 61.47 | $ 61.59

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