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Property and Equipment
 12 Months Ended
Dec. 28, 2024
Property, Plant and Equipment [Abstract]  
Property and Equipment Property and Equipment
Property and equipment (which are carried at cost) as of 2024 and 2023 year end are as follows: 
(Amounts in millions)20242023
Land$33.7 $34.5 
Buildings and improvements462.6 452.8 
Machinery, equipment and computer software1,103.7 1,083.1 
Property and equipment – gross1,600.0 1,570.4 
Accumulated depreciation(1,057.4)(1,031.1)
Property and equipment – net$542.6 $539.3 

The estimated service lives of property and equipment are principally as follows: 

Buildings and improvements  
3 to 50 years
Machinery, equipment and computer software  
2 to 15 years
Depreciation expense was $72.7 million, $72.2 million and $71.5 million in 2024, 2023 and 2022, respectively.