Property, Plant, Equipment and Mine Development (Tables)

3 Months Ended

Mar. 31, 2015

Property, Plant, Equipment and Mine Development, Net [Line Items]

Property, Plant and Equipment [Table Text Block]

Property, plant, equipment and mine development, net, as of March 31, 2015 and December 31, 2014 consisted of the following:

	March 31, 2015			December 31, 2014
	(Dollars in millions)
Land and coal interests	$	11,029.8		$	11,021.1
Buildings and improvements	1,599.3			1,569.1
Machinery and equipment	2,662.2			2,685.7
Less: Accumulated depreciation, depletion and amortization	(4,839.5		)	(4,698.6		)
Total, net	$	10,451.8		$	10,577.3