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PROPERTY, BUILDINGS AND EQUIPMENT
 12 Months Ended
Dec. 31, 2023
Property, Plant and Equipment [Abstract]  
PROPERTY, BUILDINGS AND EQUIPMENT
7. PROPERTY, BUILDINGS AND EQUIPMENT
The following table sets forth the components of property, buildings and equipment:
 As of December 31,
 20232022
 (In millions)
Buildings and leasehold improvements$202.6 $169.5 
Furniture, fixtures and equipment359.9 304.7 
Software costs292.6 272.6 
 855.1 746.7 
Accumulated depreciation and amortization(502.5)(425.8)
 352.6 320.9 
Land25.0 24.6 
Construction in progress46.0 57.1 
Property, buildings and equipment, net
$423.6 $402.7 
Depreciation expense was $56.3 million, $47.8 million and $51.4 million, and capitalized software amortization was $36.4 million, $38.3 million and $27.5 million, in 2023, 2022 and 2021, respectively. As of December 31, 2023 and 2022, unamortized software costs were $78.2 million and $89.2 million, respectively. Furniture, fixtures and equipment include finance leases of $51.9 million and $38.8 million and related accumulated depreciation of $19.9 million and $17.1 million as of December 31, 2023 and 2022, respectively.