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Property, Plant and Equipment
12 Months Ended
Dec. 31, 2021
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)20212020
Land$341.6 $325.7 
Mineral properties and rights5,791.3 5,035.2 
Buildings and leasehold improvements3,452.5 3,306.2 
Machinery and equipment9,893.6 9,846.9 
Construction in-progress1,234.4 1,447.1 
20,713.4 19,961.1 
Less: accumulated depreciation and depletion8,238.1 8,106.8 
$12,475.3 $11,854.3 
Depreciation and depletion expense was $811.8 million, $846.4 million and $877.6 million for 2021, 2020 and 2019, respectively. Capitalized interest on major construction projects was $30.1 million, $33.3 million and $28.5 million for 2021, 2020 and 2019, respectively.