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Fixed Assets | 12 Months Ended
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Dec. 31, 2023
Property, Plant and Equipment [Abstract] |
Fixed Assets | 6. Fixed Assets Major classes of fixed assets consist of the following (in millions):
|  | December 31, |
|  | 2023 |  |  | 2022 |
Office equipment |  | $ | 32.9 |  |  | $ | 32.2 |
Furniture and fixtures |  |  | 154.1 |  |  |  | 142.0 |
Leasehold improvements |  |  | 232.6 |  |  |  | 190.7 |
Computer equipment |  |  | 353.5 |  |  |  | 295.8 |
Land and buildings - corporate headquarters |  |  | 168.9 |  |  |  | 145.3 |
Software |  |  | 722.9 |  |  |  | 583.4 |
Other |  |  | 31.3 |  |  |  | 16.9 |
Work in process |  |  | 54.1 |  |  |  | 56.0 |
|  |  | 1,750.3 |  |  |  | 1,462.3 |
Accumulated depreciation |  |  | (1,023.9 | ) |  |  | (886.1 | )
Net fixed assets |  | $ | 726.4 |  |  | $ | 576.2 |
The amounts in work in process in the table above primarily are for capitalized expenditures incurred related to IT development projects in 2023 and 2022.

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