Inventories (Tables)

9 Months Ended

Jun. 30, 2023

Inventory Disclosure [Abstract]

Schedule of Components of Inventories

Inventories comprise the following: 

	June 30, 2023		September 30, 2022		June 30, 2022
Non-utility LPG and natural gas	$	189	$	335	$	261
Gas Utility natural gas	37		166		84
Energy certificates	68		70		70
Materials, supplies and other	116		94		81
Total inventories	$	410	$	665	$	496