Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
Assets
Cash and cash equivalents	$ 245,813	$ 275,478	$ 243,126
Accounts and notes receivable
Accounts and notes receivable, gross	450,642	303,178	403,520
Less: Allowance for doubtful accounts	(5,412)	(6,198)	(6,106)
Accounts and notes receivable, net	445,230	296,980	397,414
Inventories
Finished products	255,047	262,886	263,893
Raw materials	29,480	27,758	28,221
Products in process	6,385	5,963	6,209
Operating supplies and other	37,267	38,415	38,655
Inventories	328,179	335,022	336,978
Current deferred income taxes	39,326	40,696	45,353
Prepaid expenses	31,854	21,713	26,384
Assets held for sale	10,559	15,083	0
Total current assets	1,100,961	984,972	1,049,255
Investments and long-term receivables	43,275	42,081	42,226
Property, plant & equipment
Property, plant & equipment, cost	6,792,470	6,666,617	6,690,448
Reserve for depreciation, depletion & amortization	(3,578,010)	(3,507,432)	(3,477,496)
Property, plant & equipment, net	3,214,460	3,159,185	3,212,952
Goodwill	3,081,521	3,086,716	3,086,716
Other intangible assets, net	697,655	692,532	693,308
Other noncurrent assets	172,184	161,113	141,459
Total assets	8,310,056	8,126,599	8,225,916
Liabilities
Current maturities of long-term debt	163	150,602	285,153
Trade payables and accruals	154,451	113,337	133,209
Other current liabilities	204,029	171,671	213,735
Liabilities of assets held for sale	0	801	0
Total current liabilities	358,643	436,411	632,097
Long-term debt	2,523,389	2,526,401	2,527,450
Noncurrent deferred income taxes	673,135	657,367	680,880
Deferred revenue	225,863	73,583	0
Other noncurrent liabilities	666,115	671,775	618,292
Total liabilities	4,447,145	4,365,537	4,458,719
Other commitments and contingencies (Note 8)
Equity
Common stock, $1 par value, Authorized 480,000 shares, Issued 129,989, 129,721 and 129,596 shares, respectively	129,989	129,721	129,596
Capital in excess of par value	2,598,744	2,580,209	2,567,859
Retained earnings	1,288,054	1,276,649	1,274,465
Accumulated other comprehensive loss	(153,876)	(225,517)	(204,723)
Total equity	3,862,911	3,761,062	3,767,197
Total liabilities and equity	$ 8,310,056	$ 8,126,599	$ 8,225,916