Property, Plant and Equipment

12 Months Ended

Sep. 30, 2021

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Note 11 — Property, Plant and Equipment

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

	2021		2020		Estimated Useful Life
Utility:
Distribution	$	4,306	$	3,630
Transmission	111		111
General and other	507		425
Work in process	98		99
Total Utility	5,022		4,265
Non-utility:
Land	186		191
Buildings and improvements	436		431		10 - 40 years
Transportation equipment	232		248		3 - 10 years
Equipment, primarily cylinders and tanks	3,785		3,712		5 - 30 years
Electric generation	211		211		25 - 40 years
Pipeline and related assets	1,218		1,098		25 - 40 years
Other	342		306		1 - 12 years
Work in process	76		196
Total non-utility	6,486		6,393
Total property, plant and equipment	$	11,508	$	10,658

The average composite depreciation rates at our regulated natural gas utilities (inclusive of Gas Utility and Mountaineer) and Electric Utility were as follows:

	2021		2020		2019
Regulated natural gas utilities	2.6	%	2.5	%	2.2	%
Electric Utility	2.3	%	2.2	%	2.1	%

Depreciation expense totaled $437, $416 and $389 for Fiscal 2021, Fiscal 2020 and Fiscal 2019, respectively.