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Property, Plant, and Equipment (Tables)
3 Months Ended
Mar. 31, 2025
Property, Plant and Equipment [Abstract]  
Components of property, plant, and equipment
The following table summarizes the components of property, plant, and equipment as of March 31, 2025 and December 31, 2024.
March 31,
2025
December 31,
2024
 (in millions)
Land$158.0 $158.3 
Mineral reserves1,113.2 1,111.7 
Buildings and improvements369.8 366.4 
Machinery and other1,323.4 1,292.8 
Construction in progress124.5 129.7 
3,088.9 3,058.9 
Less accumulated depreciation and depletion(971.0)(929.5)
$2,117.9 $2,129.4