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Property, Plant and Equipment (Tables)
12 Months Ended
Dec. 31, 2021
Property, Plant and Equipment [Abstract]  
Property, plant and equipment
Property, plant and equipment, including those acquired by capital lease, consisted of the following:
(in millions)December 31,
2021
December 31,
2020
Computer equipment and furniture$511.8 $451.8 
Purchased software218.3 179.0 
Building and building improvements139.8 118.0 
Land3.2 3.2 
Total cost of property, plant and equipment873.1 752.0 
Less: accumulated depreciation(625.4)(532.3)
Total property, plant and equipment, net of accumulated depreciation$247.7 $219.7