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Inventories (Details) - USD ($) $ in Millions	Sep. 30, 2025	Sep. 30, 2024
Public Utilities, Inventory
Total inventories	$ 385	$ 411
Non-utility LPG and natural gas
Public Utilities, Inventory
Total inventories	162	195
Gas Utility natural gas
Public Utilities, Inventory
Total inventories	67	50
Energy certificates
Public Utilities, Inventory
Total inventories	64	69
Materials, supplies and other
Public Utilities, Inventory
Total inventories	$ 92	$ 97

X

- Definition

Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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