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Property and Equipment | 12 Months Ended
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Dec. 31, 2021
Property, Plant and Equipment [Abstract] |
Property and Equipment. | Net property and equipment consisted of the following (in millions):
|  | December 31,
|  | 2021 |  | 2020
Computer hardware and software |  | $ | 172.2 |  |  | $ | 154.3 |
Furniture, fixtures and equipment |  | 24.0 |  |  | 24.2 |
Leasehold improvements |  | 24.4 |  |  | 23.9 |
Work-in-progress |  | 8.2 |  |  | 3.6 |
|  | 228.8 |  |  | 206.0 |
Less: accumulated depreciation |  | (173.8) |  |  | (151.1) |
|  | $ | 55.0 |  |  | $ | 54.9 |
The Company has capitalized costs related to its various technology initiatives. At December 31, 2021, the net book value of computer software was $27.7 million, which included work-in-progress of $8.2 million. At December 31, 2020, the net book value of computer software was $23.4 million, which included work-in-progress of $3.6 million. The following table summarizes the presentation of depreciation expense within the accompanying consolidated statements of operations (in millions).
|  | Year Ended December 31,
|  | 2021 |  | 2020 |  | 2019
Selling, general and administrative expenses |  | $ | 23.4 |  |  | $ | 23.7 |  |  | $ | 17.7 |
Costs of services |  | 4.6 |  |  | 4.6 |  |  | 10.3 |
|  | $ | 28.0 |  |  | $ | 28.3 |  |  | $ | 28.0 |

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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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