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Property and Equipment, Net | 12 Months Ended
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Dec. 31, 2021
Property, Plant and Equipment [Abstract] |
Property, Plant and Equipment | 6. Property and Equipment, Net Property and equipment, net consisted of the following (in millions):
|  | December 31, |
|  | 2021 |  |  | 2020 |
Leasehold improvements |  | $ | 158.2 |  |  | $ | 144.1 |
Office furniture and equipment |  |  | 31.9 |  |  |  | 29.0 |
Computer software and internally-developed software |  |  | 28.1 |  |  |  | 23.8 |
Computer equipment |  |  | 24.2 |  |  |  | 22.0 |
|  |  | 242.4 |  |  |  | 218.9 |
Less: accumulated depreciation |  |  | (85.0 | ) |  |  | (77.2 | )
Property and equipment, net |  | $ | 157.4 |  |  | $ | 141.7 |
The Company recorded depreciation expense related to property and equipment of $38.5 million, $34.4 million and $24.3 million for the years ended December 31, 2021, 2020 and 2019, respectively which includes $6.0 million, $4.8 million and $4.0 million, respectively, related to capitalized internally–developed software. The Company capitalized internally-developed software costs of $15.7 million and $5.2 million during the years ended December 31, 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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