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SHAREHOLDERS' EQUITY - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 12 Months Ended
--- | --- | ---
Sep. 09, 2020 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2018
Stockholders' Equity Note [Abstract] |  |  |  |
Number of common shares authorized to be repurchased (in shares) |  | 4,000,000,000,000 |  |
Shares of common stock repurchased (in shares) |  | 1,500,000 | 1,000,000.0 | 0
Aggregate cost of repurchased shares |  | $ 28,500 | $ 42,800 |
Cash dividends |  | $ (209,798) | $ (313,088) | $ (310,024)
Dividends declared (in dollars per share) | $ 0.25 | $ 1.92 | $ 2.84 | $ 2.82
Dividends payable |  | $ 27,226 | $ 77,763 |

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- Definition Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121566466&loc=d3e6935-107765 + Details
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