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SHAREHOLDERS' EQUITY - Repurchases of Stock (Details) - shares | 9 Months Ended
--- | ---
Jun. 30, 2019 | Jun. 30, 2018
Payments for Repurchase of Equity [Abstract] |  |
Repurchase of common stock (in shares) | 0 | 0
Maximum |  |
Payments for Repurchase of Equity [Abstract] |  |
Number of common shares authorized to be repurchased (in shares) | 4,000,000,000,000 |

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- Definition The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
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