PROPERTY, PLANT AND EQUIPMENT (Tables)

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment [Abstract]

Schedule of property, plant and equipment

Property, plant and equipment consists of the following at December 31 (in millions):

	2019			2018
Land, buildings and structures and leasehold improvements	$	596.0		$	580.7
Machinery and equipment	1,001.9			983.2
Office furniture and equipment	60.7			54.4
Mineral interests	171.1			168.1
Construction in progress	141.3			118.3
	1,971.0			1,904.7
Less accumulated depreciation and depletion	(940.2		)	(852.7		)
Property, plant and equipment, net	$	1,030.8		$	1,052.0