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Property and Equipment, net | 9 Months Ended
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Jun. 30, 2021
Property Plant And Equipment [Abstract] |
Property and Equipment, net | 5. Property and Equipment, net Property and equipment, net consists of the following:
|  | Useful Life |  | June 30, 2021 |  |  | September 30, 2020 |
Land |  | — |  | $ | 42.3 |  |  | $ | 40.0 |
Buildings and leasehold improvements |  | 2-40 yrs. |  |  | 30.7 |  |  |  | 30.3 |
Operating equipment |  | 2-7 yrs. |  |  | 235.5 |  |  |  | 208.2 |
Transportation vehicles |  | 3-7 yrs. |  |  | 285.0 |  |  |  | 262.8 |
Office equipment and software |  | 3-10 yrs. |  |  | 71.4 |  |  |  | 68.1 |
Construction in progress |  | — |  |  | 5.6 |  |  |  | 5.0 |
Property and equipment |  |  |  |  | 670.5 |  |  |  | 614.4 |
Less: Accumulated depreciation |  |  |  |  | 401.5 |  |  |  | 362.9 |
Property and equipment, net |  |  |  | $ | 269.0 |  |  | $ | 251.5 |
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 $21.3 and $20.9 for the three months ended June 30, 2021 and 2020, respectively. Depreciation expense related to property and equipment was $63.6 and $60.4 for the nine months ended June 30, 2021 and 2020, 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://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=120429125&loc=SL120174063-112916 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99779-112916 + Details
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