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Property and Equipment (Tables) | 12 Months Ended
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Dec. 31, 2020
Property, Plant and Equipment [Abstract] |
Schedule of property and equipment | The amount of property and equipment and their respective estimated useful lives are as follows (in millions):
|  | As of December 31, |  | Estimated
|  | 2020 |  | 2019 |  | Useful Lives
Land |  | $ | 19.1 |  |  | $ | 22.3 |  |  | Indefinite
Buildings and leasehold improvements |  | 74.5 |  |  | 84.8 |  |  | 3 - 40 years
Office equipment, furniture and fixtures |  | 15.3 |  |  | 16.9 |  |  | 3 - 7 years
Computer equipment and software costs |  | 275.8 |  |  | 261.4 |  |  | 3 - 9 years
Machinery, equipment and vehicles |  | 267.7 |  |  | 269.3 |  |  | 3 - 40 years
|  | 652.3 |  |  | 654.8 |  |  |
Less: Accumulated depreciation and amortization |  | 309.7 |  |  | 293.9 |  |  |
|  | $ | 342.6 |  |  | $ | 360.9 |  |  |
Schedule of amount of computer software costs, including capitalized internally developed software costs | The amount of computer software costs, including capitalized internally developed software costs and certain hosting arrangement costs are as follows (in millions):
| As of December 31,
| 2020 |  | 2019
Computer software costs | $ | 191.7 |  |  | $ | 169.9 |
Less: Accumulated amortization | 116.1 |  |  | 110.0 |
Computer software costs, net | $ | 75.6 |  |  | $ | 59.9 |

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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