Property, Plant, Equipment and Mine Development (Tables)

6 Months Ended

Jun. 30, 2019

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

The composition of property, plant, equipment and mine development, net, as of June 30, 2019 and December 31, 2018 is set forth in the table below:

	June 30, 2019			December 31, 2018
	(Dollars in millions)
Land and coal interests	$	4,164.3		$	4,148.8
Buildings and improvements	549.1			559.3
Machinery and equipment	1,528.7			1,456.3
Less: Accumulated depreciation, depletion and amortization	(1,267.3		)	(957.4		)
Property, plant, equipment and mine development, net	$	4,974.8		$	5,207.0