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Inventories
3 Months Ended
Dec. 31, 2022
Inventory Disclosure [Abstract]  
Inventories
Note 6 — Inventories

Inventories comprise the following: 
December 31,
2022
September 30,
2022
December 31,
2021
Non-utility LPG and natural gas$310 $335 $352 
Gas Utility natural gas129 166 65 
Energy certificates78 70 60 
Materials, supplies and other101 94 71 
Total inventories$618 $665 $548