Impairment Charges and Mine Closure Costs (Tables)

12 Months Ended

Dec. 31, 2014

Impairment Charges and Mine Closure Costs [Abstract]

Restructuring and Related Costs

In 2012, the closure and idling of mines in Appalachia discussed in Note 1, "Basis of Presentation" resulted in closure costs and related impairment charges as follow:        

	In millions
Parts and supplies inventory writedown	$	2.6
Impairment of property, plant and equipment	95.6
Impairment of coal properties and deferred development costs	403.3
Royalty obligations	11.5
Employee termination benefits	12.3
Pension, postretirement and occupational disease curtailment gain, net	(1.8		)
	$	523.5