Property, Plant, and Equipment (Tables)

3 Months Ended

Mar. 31, 2020

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, 2020 and December 31, 2019.

	March 31, 2020		December 31, 2019
	(in millions)
Land(1)	$	367.4	$	331.4
Buildings and improvements	291.8		280.5
Machinery and other	805.6		755.7
Construction in progress	38.9		38.6
	1,503.7		1,406.2
Less accumulated depreciation and depletion	(612.0)		(590.0)
	$	891.7	$	816.2

⁽¹⁾ Includes depletable land of $230.2 million as of March 31, 2020 and $211.0 million as of December 31, 2019.