Property, Plant, Equipment and Mine Development (Tables)

3 Months Ended

Mar. 31, 2019

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

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

	March 31, 2019			December 31, 2018
	(Dollars in millions)
Land and coal interests	$	4,149.8		$	4,148.8
Buildings and improvements	558.3			559.3
Machinery and equipment	1,474.0			1,456.3
Less: Accumulated depreciation, depletion and amortization	(1,112.6		)	(957.4		)
Property, plant, equipment and mine development, net	$	5,069.5		$	5,207.0