XML 37 R21.htm IDEA: XBRL DOCUMENT
v3.25.3

Property, Plant and Equipment | 12 Months Ended
--- | ---
Sep. 30, 2025
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:
| 2025 |  | 2024 |  | Estimated Useful Life
Utility: |  |  |  |  |
Distribution | $ | 6,024 |  |  | $ | 5,595 |  |  |
Transmission | 134 |  |  | 125 |  |  |
General and other | 746 |  |  | 706 |  |  |
Work in process | 130 |  |  | 94 |  |  |
Total utility | 7,034 |  |  | 6,520 |  |  |
Non-utility: |  |  |  |  |
Land | 202 |  |  | 172 |  |  |
Buildings and improvements | 445 |  |  | 429 |  |  | 10 - 40 years
Transportation equipment | 242 |  |  | 233 |  |  | 3 - 10 years
Equipment, primarily cylinders and tanks | 4,052 |  |  | 3,985 |  |  | 5 - 30 years
Electric generation | 48 |  |  | 48 |  |  | 25 - 40 years
Pipeline and related assets | 1,710 |  |  | 1,598 |  |  | 25 - 40 years
Other | 467 |  |  | 430 |  |  | 1 - 12 years
Work in process | 150 |  |  | 258 |  |  |
Total non-utility | 7,316 |  |  | 7,153 |  |  |
Total property, plant and equipment | $ | 14,350 |  |  | $ | 13,673 |  |  |
The average composite depreciation rates at our Gas Utility and Electric Utility were as follows:
| 2025 |  | 2024 |  | 2023
Regulated natural gas utilities | 2.5 | % |  | 2.6 | % |  | 2.4 | %
Electric utility | 2.4 | % |  | 2.5 | % |  | 2.3 | %
Depreciation expense totaled $507, $496 and $476 for Fiscal 2025, Fiscal 2024 and Fiscal 2023, respectively.

X
- References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/360/tableOfContent Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 6 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477798/958-360-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477798/958-360-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 7 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477798/958-360-50-7 + Details
Name: | us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration