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Inventories
12 Months Ended
Sep. 30, 2021
Inventory Disclosure [Abstract]  
Inventories
Note 10 — Inventories
Inventories comprise the following at September 30:
20212020
Non-utility LPG and natural gas$278 $164 
Utility natural gas68 20 
Energy certificates53 
Materials, supplies and other70 54 
Total inventories$469 $241