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SHAREHOLDERS' EQUITY, Preferred Stock by Class (Details) - USD ($) $ in Millions | Jun. 30, 2026 | Sep. 30, 2025
--- | --- | ---
Class of Stock [Line Items] |  |
Carrying value | $ 0 | $ 79
Series B Preferred Stock |  |
Class of Stock [Line Items] |  |
Shares outstanding (in shares) | 0 | 80,500
Carrying value | $ 0 | $ 79
Aggregate liquidation preference | $ 0 | $ 81

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