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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - PROPERTY PLANT AND EQUIPMENT (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Sep. 30, 2023
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Property Classifications |  |
Total property, plant and equipment | $ 6,496,515 | $ 5,990,539
Accumulated depreciation and amortization | (1,093,292) | (968,484)
Property, plant and equipment, net | 5,403,223 | 5,022,055
Distribution facilities |  |
Property Classifications |  |
Total property, plant and equipment | $ 3,436,308 | 3,063,111
Distribution facilities | Minimum |  |
Property Classifications |  |
Estimated Useful Lives | 11 years |
Distribution facilities | Maximum |  |
Property Classifications |  |
Estimated Useful Lives | 54 years |
Transmission facilities |  |
Property Classifications |  |
Total property, plant and equipment | $ 656,098 | 650,817
Transmission facilities | Minimum |  |
Property Classifications |  |
Estimated Useful Lives | 28 years |
Transmission facilities | Maximum |  |
Property Classifications |  |
Estimated Useful Lives | 42 years |
Storage facilities |  |
Property Classifications |  |
Total property, plant and equipment | $ 86,329 | 85,603
Storage facilities | Minimum |  |
Property Classifications |  |
Estimated Useful Lives | 27 years |
Storage facilities | Maximum |  |
Property Classifications |  |
Estimated Useful Lives | 86 years |
Solar property |  |
Property Classifications |  |
Total property, plant and equipment | $ 885,518 | 864,838
Solar property | Minimum |  |
Property Classifications |  |
Estimated Useful Lives | 15 years |
Solar property | Maximum |  |
Property Classifications |  |
Estimated Useful Lives | 35 years |
Storage and transportation property |  |
Property Classifications |  |
Total property, plant and equipment | $ 929,850 | 884,647
Storage and transportation property | Minimum |  |
Property Classifications |  |
Estimated Useful Lives | 5 years |
Storage and transportation property | Maximum |  |
Property Classifications |  |
Estimated Useful Lives | 50 years |
All other property |  |
Property Classifications |  |
Total property, plant and equipment | $ 62,248 | 61,327
All other property | Minimum |  |
Property Classifications |  |
Estimated Useful Lives | 5 years |
All other property | Maximum |  |
Property Classifications |  |
Estimated Useful Lives | 40 years |
Construction work in progress |  |
Property Classifications |  |
Total property, plant and equipment | $ 440,164 | $ 380,196

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