Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current Assets:
Cash and Cash Equivalents	$ 147,393	$ 327,420
Accounts and Notes Receivable:
Trade	275,431	332,574
Notes, Loans and Financing Receivable, Net, Current	1,328	25,861
Other Receivables	390,484	243,973
Inventories	148,005	157,914
Deferred Income Taxes	137,716	211,303
Recoverable Income Taxes	47,060	10,705
Prepaid Expenses	78,438	135,842
Total Current Assets	1,225,855	1,445,592
Property, Plant and Equipment:
Property, Plant and Equipment	14,160,967	13,578,509
Less-Accumulated Depreciation, Depletion and Amortization	4,384,209	4,136,247
Total Property, Plant and Equipment-Net	9,776,758	9,442,262
Other Assets:
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	352,187	291,675
Notes, Loans and Financing Receivable, Net, Noncurrent	0	125
Other	211,847	214,013
Total Other Assets	564,034	505,813
Total Assets	11,566,647	11,393,667
Current Liabilities:
Accounts Payable	504,009	514,580
Current Portion of Long-Term Debt	12,127	11,455
Other Accrued Liabilities	554,476	565,697
Liabilities of Disposal Group, Including Discontinued Operation, Current	13,054	28,239
Total Current Liabilities	1,083,666	1,119,971
Long-Term Debt:
Long-Term Debt	3,214,913	3,115,963
Capital Lease Obligations	44,468	47,596
Total Long-Term Debt	3,259,381	3,163,559
Deferred Credits and Other Liabilities
Deferred Tax Liabilities, Net, Noncurrent	291,928	242,643
Postretirement Benefits Other Than Pensions	959,034	961,127
Pneumoconiosis Benefits	111,519	111,971
Mine Closing	320,902	320,723
Gas Well Closing	180,097	175,603
Workers' Compensation	73,406	71,468
Salary Retirement	58,962	48,252
Reclamation	35,779	40,706
Other	132,315	131,355
Total Deferred Credits and Other Liabilities	2,163,942	2,103,848
TOTAL LIABILITIES	6,506,989	6,387,378
Stockholders' Equity:
Common Stock, $.01 Par Value; 500,000,000 Shares Authorized, 230,165,816 Issued and Outstanding at June 30, 2014; 229,145,736 Issued and Outstanding at December 31, 2013	2,305	2,294
Capital in Excess of Par Value	2,405,728	2,364,592
Preferred Stock, 15,000,000 shares authorized, None issued and outstanding	0	0
Retained Earnings	3,011,340	2,964,520
Accumulated Other Comprehensive Loss	(359,715)	(325,117)
Stockholders' Equity Attributable to Parent	5,059,658	5,006,289
TOTAL LIABILITIES AND EQUITY	$ 11,566,647	$ 11,393,667