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Property, Plant, and Equipment
 9 Months Ended
Sep. 30, 2023
Property, Plant and Equipment [Abstract]  
Property, Plant, and Equipment Property, Plant, and Equipment
The following table summarizes the components of property, plant, and equipment as of September 30, 2023 and December 31, 2022.
September 30,
2023		December 31,
2022
 (in millions)
Land$140.1 $138.7 
Mineral reserves517.3 506.3 
Buildings and improvements327.4 308.3 
Machinery and other1,052.1 973.9 
Construction in progress118.9 83.7 
2,155.8 2,010.9 
Less accumulated depreciation and depletion(901.2)(811.3)
$1,254.6 $1,199.6