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Property and Equipment, net | 6 Months Ended
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Mar. 31, 2024
Property, Plant and Equipment [Abstract] |
Property and Equipment, net | 5. Property and Equipment, net Property and equipment, net consists of the following:
|  | Useful Life |  | March 31, 2024 |  |  | September 30, 2023 |
Land |  | — |  | $ | 44.7 |  |  | $ | 44.7 |
Buildings and leasehold improvements |  | 2-40 yrs. |  |  | 46.7 |  |  |  | 45.6 |
Operating equipment |  | 2-7 yrs. |  |  | 350.4 |  |  |  | 338.8 |
Transportation vehicles |  | 3-7 yrs. |  |  | 356.6 |  |  |  | 351.9 |
Office equipment and software |  | 3-10 yrs. |  |  | 75.7 |  |  |  | 68.7 |
Construction in progress |  | — |  |  | 4.1 |  |  |  | 7.7 |
Property and equipment |  |  |  |  | 878.2 |  |  |  | 857.4 |
Less: Accumulated depreciation |  |  |  |  | 574.2 |  |  |  | 542.2 |
Property and equipment, net |  |  |  | $ | 304.0 |  |  | $ | 315.2 |
Construction in progress includes costs incurred for software and other assets that have not yet been placed in service. Depreciation expense related to property and equipment was $26.1 and $27.4 for the three months ended March 31, 2024 and 2023, respectively. Depreciation expense related to property and equipment was $51.7 and $54.5 for the six months ended March 31, 2024 and 2023, respectively.

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- 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//1943274/2147480321/958-360-50-6 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//1943274/2147480321/958-360-50-1 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//1943274/2147480321/958-360-50-7 + Details
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