Property, Plant and Equipment, Net

12 Months Ended

Dec. 31, 2020

Property Plant And Equipment [Abstract]

Property, Plant and Equipment, Net

Note G: Property, Plant and Equipment, Net

December 31
(in millions)	2020			2019
Land and land improvements	$	1,231.9		$	1,135.0
Mineral reserves and interests		2,529.7			2,509.8
Buildings		164.2			163.4
Machinery and equipment		4,782.0			4,548.6
Construction in progress		209.4			258.4
Finance lease right-of-use assets		37.8			18.3
Total property, plant and equipment		8,955.0			8,633.5
Less: accumulated depreciation, depletion and amortization		(3,712.7	)		(3,427.5	)
Property, plant and equipment, net	$	5,242.3		$	5,206.0

Depreciation, depletion and amortization expense related to property, plant and equipment was $376.3 million, $354.4 million and $326.1 million for the years ended December 31, 2020, 2019 and 2018, respectively. Depreciation, depletion and amortization expense for 2020 and 2019 includes amortization of right-of-use assets from finance leases and for 2018 includes amortization of machinery and equipment under capital leases.

Interest expense of $4.2 million, $5.1 million and $3.0 million was capitalized during 2020, 2019 and 2018, respectively.

At December 31, 2020 and 2019, $46.0 million and $49.7 million, respectively, of the Building Materials business’ property, plant and equipment, net, were located in foreign countries, namely The Bahamas and Canada.