Property, Plant, Equipment and Mine Development (Tables)

9 Months Ended

Sep. 30, 2018

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

The composition of property, plant, equipment and mine development, net, as of September 30, 2018 and December 31, 2017 is set forth in the table below. Refer to Note 2. “Emergence from the Chapter 11 Cases and Fresh Start Reporting” in the Company's Annual Report on Form 10-K for the year ended December 31, 2017 for details regarding the impact of fresh start reporting on property, plant, equipment and mine development.

	September 30, 2018			December 31, 2017
	(Dollars in millions)
Land and coal interests	$	3,900.4		$	3,890.5
Buildings and improvements	457.0			470.6
Machinery and equipment	1,304.1			1,149.3
Less: Accumulated depreciation, depletion and amortization	(809.6		)	(398.5		)
Property, plant, equipment and mine development, net	$	4,851.9		$	5,111.9