Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current Assets:
Cash and Cash Equivalents	$ 21,086	$ 21,878
Accounts and Notes Receivable:
Trade	436,388	428,328
Notes, Loans and Financing Receivable, Net, Current	25,813	318,387
Other Receivables	160,931	131,131
Accounts Receivable - Securitized	44,364	37,846
Inventories	238,348	247,766
Deferred Income Taxes	81,825	148,104
Restricted Cash and Cash Equivalents, Current	12,263	48,294
Prepaid Expenses	162,418	157,360
Total Current Assets	1,183,436	1,539,094
Property, Plant and Equipment:
Property, Plant and Equipment	16,571,104	15,545,204
Less-Accumulated Depreciation, Depletion and Amortization	5,940,247	5,354,237
Total Property, Plant and Equipment-Net	10,630,857	10,190,967
Other Assets:
Deferred Income Taxes	457,105	444,585
Restricted Cash	0	20,379
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	261,218	222,830
Notes, Loans and Financing Receivable, Net, Noncurrent	155	25,977
Other	204,301	227,077
Total Other Assets	922,779	940,848
Total Assets	12,737,072	12,670,909
Current Liabilities:
Accounts Payable	512,182	507,982
Current Portion of Long-Term Debt	13,182	13,485
Short-Term Notes Payable	47,000	25,073
Accrued Income Taxes, Current	87,965	34,219
Secured Debt, Current	44,364	37,846
Other Accrued Liabilities	868,904	768,494
Total Current Liabilities	1,573,597	1,387,099
Long-Term Debt:
Long-Term Debt	3,123,755	3,124,473
Capital Lease Obligations	48,176	50,113
Total Long-Term Debt	3,171,931	3,174,586
Deferred Credits and Other Liabilities
Postretirement Benefits Other Than Pensions	2,814,234	2,832,401
Pneumoconiosis Benefits	178,508	174,781
Mine Closing	460,515	446,727
Gas Well Closing	197,093	148,928
Workers' Compensation	156,568	155,648
Salary Retirement	74,108	218,004
Reclamation	49,487	47,965
Other	103,855	131,025
Total Deferred Credits and Other Liabilities	4,034,368	4,155,479
TOTAL LIABILITIES	8,779,896	8,717,164
Stockholders' Equity:
Common Stock, $.01 Par Value; 500,000,000 Shares Authorized, 228,936,248 Issued and Outstanding at September 30, 2013; 228,129,467 Issued and 228,094,712 Outstanding at December 31, 2012	2,292	2,284
Capital in Excess of Par Value	2,347,973	2,296,908
Preferred Stock, 15,000,000 shares authorized, None issued and outstanding	0	0
Retained Earnings	2,257,796	2,402,551
Accumulated Other Comprehensive Loss	(649,896)	(747,342)
Common Stock in Treasury, at Cost—No Shares at September 30, 2013 and 34,755 Shares at December 31, 2012	0	(609)
Stockholders' Equity Attributable to Parent	3,958,165	3,953,792
Stockholders' Equity Attributable to Noncontrolling Interest	(989)	(47)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	3,957,176	3,953,745
TOTAL LIABILITIES AND EQUITY	$ 12,737,072	$ 12,670,909