Property, Plant and Equipment (Tables)

12 Months Ended

Sep. 30, 2022

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

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

	2022		2021		Estimated Useful Life
Utility:
Distribution	$	4,746	$	4,306
Transmission	123		111
General and other	557		507
Work in process	124		98
Total Utility	5,550		5,022
Non-utility:
Land	179		186
Buildings and improvements	426		436		10 - 40 years
Transportation equipment	234		232		3 - 10 years
Equipment, primarily cylinders and tanks	3,645		3,785		5 - 30 years
Electric generation	216		211		25 - 40 years
Pipeline and related assets	1,523		1,218		25 - 40 years
Other	380		342		1 - 12 years
Work in process	53		76
Total non-utility	6,656		6,486
Total property, plant and equipment	$	12,206	$	11,508

Average Composite Depreciation Rates

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

	2022		2021		2020
Regulated natural gas utilities	2.6	%	2.6	%	2.5	%
Electric Utility	2.4	%	2.3	%	2.2	%