Unaudited Condensed Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current Assets
Cash and cash equivalents	$ 155.7	$ 153.7
Accounts receivable, net	107.7	100.7
Inventories, net	205.4	161.3
Deferred income taxes	23.9	24.5
Prepaid expenses and other	14.9	10.6
Assets held for sale	1.5	31.4
Current assets of discontinued operations	0	893.9
Total Current Assets	509.1	1,376.1
Property, Plant and Equipment, Net	193.5	107.2
Goodwill	7.5	0
Coal Supply Agreement, Net	71.9	57.9
Long-term Deferred Income Taxes	0	0.3
Other Non-current Assets	40.0	48.6
Long-term Assets of Discontinued Operations	0	218.6
Total Assets	822.0	1,808.7
Current Liabilities
Accounts payable	134.4	94.2
Revolving credit agreements of subsidiaries - not guaranteed by the parent company	42.0	67.0
Current maturities of long-term debt of subsidiaries - not guaranteed by the parent company	7.0	6.7
Accrued payroll	18.0	19.1
Deferred revenue	1.6	1.3
Other current liabilities	40.8	41.5
Current liabilities of discontinued operations	0	661.4
Total Current Liabilities	243.8	891.2
Long-term Debt of Subsidiaries - not guaranteed by the parent company	158.4	74.5
Asset Retirement Obligations	34.6	23.4
Pension and other Postretirement Obligations	24.5	29.3
Long-term Deferred Income Taxes	24.0	20.0
Other Long-term Liabilities	45.6	34.6
Long-term Liabilities of Discontinued Operations	0	158.7
Total Liabilities	530.9	1,231.7
Stockholders' Equity:
Capital in excess of par value	24.9	22.7
Retained earnings	321.3	619.7
Accumulated other comprehensive loss	(63.5)	(74.6)
Total Stockholders' Equity	291.1	576.2
Noncontrolling Interest	0	0.8
Total Equity	291.1	577.0
Total Liabilities and Equity	822.0	1,808.7
Common Class A [Member]
Stockholders' Equity:
Common stock	6.8	6.8
Common Class B [Member]
Stockholders' Equity:
Common stock	$ 1.6	$ 1.6