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Property, Plant and Equipment
12 Months Ended
Dec. 31, 2023
Property, Plant and Equipment [Abstract]  
Property Plant And Equipment PROPERTY, PLANT AND EQUIPMENT
Property, plant and equipment consist of the following:
 December 31,
(in millions)20232022
Land$373.0 $345.6 
Mineral properties and rights6,477.5 6,018.2 
Buildings and leasehold improvements3,881.6 3,522.6 
Machinery and equipment11,407.6 10,606.8 
Construction in-progress1,359.8 1,130.4 
23,499.5 21,623.6 
Less: accumulated depreciation and depletion9,914.1 8,944.9 
$13,585.4 $12,678.7 
Depreciation and depletion expense was $958.9 million, $932.1 million, and $811.8 million for 2023, 2022 and 2021, respectively. Interest capitalized on major construction projects was $35.2 million, $26.8 million, and $30.1 million for 2023, 2022 and 2021, respectively.