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PROPERTY, EQUIPMENT AND SOFTWARE (Tables)
12 Months Ended
Dec. 31, 2023
Property, Plant and Equipment [Abstract]  
Summary of Property, Equipment and Software
Property, equipment and software at December 31 consists of: 
(in millions)20232022
Computer and communications software and equipment$1,497.3 $1,364.6 
Buildings and improvements490.7 488.9 
Leasehold improvements260.9 236.3 
Furniture and other equipment207.8 209.7 
Land25.7 25.7 
2,482.4 2,325.2 
Less accumulated depreciation and amortization1,675.8 1,569.5 
Total$806.6 $755.7