Coal Mining Business (Tables)

3 Months Ended

Mar. 31, 2016

Discontinued Operations and Disposal Groups [Abstract]

Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures

The assets of the disposal group were previously reported as part of the Coal Mining reportable segment. Certain coal mining assets and liabilities, primarily coal inventory, were retained by the Company and continue to be included in the Coal Mining segment.  Summarized below are the assets and liabilities of our coal business presented as held for sale on our Consolidated Balance Sheets:

	March 31, 2016			December 31, 2015
	(Dollars in millions)
Assets
Receivables	$	0.6		$	0.6
Inventories	0.2			0.3
Properties, plants and equipment, net	10.7			—
Valuation allowance	(10.7		)	—
Total current assets held for sale	0.8			0.9
Properties, plants and equipment, net	—			11.4
Total assets held for sale	$	0.8		$	12.3
Liabilities
Accounts payable	$	0.1		$	0.1
Accrued liabilities	0.7			0.8
Asset retirement obligations	5.9			—
Total current liabilities held for sale	6.7			0.9
Asset retirement obligations	—			5.9
Total liabilities held for sale	$	6.7		$	6.8