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PROPERTY AND EQUIPMENT (Tables)
12 Months Ended
Dec. 31, 2023
Property, Plant and Equipment [Abstract]  
Schedule of Property and Equipment Depreciation and amortization are calculated on a straight-line basis over the following estimated useful lives of the assets:
Buildings
Twenty to thirty-nine years
LandIndefinite
Aircrafts
Ten to twenty years
Furniture and office equipment
Five to ten years
Vehicles
Four to five years
Computer hardware and software
Three to five years
Leasehold improvementsShorter of lease terms or useful life
Property and equipment consists of the following (in millions):
 December 31,
 20232022
Leasehold improvements$87.8 $108.9 
Furniture, office equipment and vehicles73.4 52.6 
Computer hardware and software56.3 43.8 
Aircrafts44.2 44.2 
Land52.2 52.2 
Buildings263.8 105.1 
Property and equipment, gross577.7 406.8 
Accumulated depreciation and amortization(105.5)(85.5)
Property and equipment, net$472.2 $321.3