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Inventories (Details) - USD ($) $ in Millions | Sep. 30, 2022 | Sep. 30, 2021
--- | --- | ---
Public Utilities, Inventory |  |
Total inventories | $ 665 | $ 469
Non-utility LPG and natural gas |  |
Public Utilities, Inventory |  |
Total inventories | 335 | 278
Gas Utility natural gas |  |
Public Utilities, Inventory |  |
Total inventories | 166 | 68
Energy certificates |  |
Public Utilities, Inventory |  |
Total inventories | 70 | 53
Materials, supplies and other |  |
Public Utilities, Inventory |  |
Total inventories | $ 94 | $ 70

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