Property, Plant and Equipment (Tables)

12 Months Ended

Sep. 30, 2023

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, plant and equipment comprise the following at September 30:

	2023		2022		Estimated Useful Life
Utility:
Distribution	$	5,204	$	4,746
Transmission	123		123
General and other	660		557
Work in process	95		124
Total Utility	6,082		5,550
Non-utility:
Land	174		179
Buildings and improvements	418		426		10 - 40 years
Transportation equipment	238		234		3 - 10 years
Equipment, primarily cylinders and tanks	3,903		3,645		5 - 30 years
Electric generation	190		216		25 - 40 years
Pipeline and related assets	1,577		1,523		25 - 40 years
Other	390		380		1 - 12 years
Work in process	156		53
Total non-utility	7,046		6,656
Total property, plant and equipment	$	13,128	$	12,206

Average Composite Depreciation Rates

The average composite depreciation rates at our Gas Utility and Electric Utility were as follows:

	2023		2022		2021
Regulated natural gas utilities	2.4	%	2.6	%	2.6	%
Electric Utility	2.3	%	2.4	%	2.3	%