Condensed Consolidated Balance Sheets (Unaudited, except for December 31) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2011
Assets
Cash and cash equivalents	$ 191,172	$ 155,839	$ 63,164
Restricted cash	0	81	109
Accounts and notes receivable
Accounts and notes receivable, gross	325,383	321,391	285,644
Less: Allowance for doubtful accounts	(7,207)	(6,498)	(7,518)
Accounts and notes receivable, net	318,176	314,893	278,126
Inventories
Finished products	271,634	260,732	257,522
Raw materials	23,819	23,819	26,570
Products in process	5,077	4,198	4,830
Operating supplies and other	40,803	38,908	40,265
Inventories	341,333	327,657	329,187
Current deferred income taxes	43,394	43,032	57,993
Prepaid expenses	24,574	21,598	25,035
Assets held for sale	0	0	13,281
Total current assets	918,649	863,100	766,895
Investments and long-term receivables	29,172	29,004	37,271
Property, plant & equipment
Property, plant & equipment, cost	6,698,952	6,705,546	6,729,220
Reserve for depreciation, depletion & amortization	(3,349,258)	(3,287,367)	(3,136,390)
Property, plant & equipment, net	3,349,694	3,418,179	3,592,830
Goodwill	3,086,716	3,086,716	3,097,016
Other intangible assets, net	695,852	697,502	701,046
Other noncurrent assets	135,956	134,813	105,378
Total assets	8,216,039	8,229,314	8,300,436
Liabilities
Current maturities of long-term debt	144,706	134,762	5,238
Short-term borrowings	0	0	300,000
Trade payables and accruals	125,101	103,931	119,702
Other current liabilities	211,286	167,560	209,662
Liabilities of assets held for sale	0	0	356
Total current liabilities	481,093	406,253	634,958
Long-term debt	2,669,752	2,680,677	2,427,596
Noncurrent deferred income taxes	704,166	732,528	807,029
Other noncurrent liabilities	615,421	618,239	534,418
Total liabilities	4,470,432	4,437,697	4,404,001
Other commitments and contingencies (Note 18)
Equity
Common stock, $1 par value	129,389	129,245	129,107
Capital in excess of par value	2,547,959	2,544,740	2,524,514
Retained earnings	1,281,080	1,334,476	1,416,486
Accumulated other comprehensive loss	(212,821)	(216,844)	(173,672)
Total equity	3,745,607	3,791,617	3,896,435
Total liabilities and equity	$ 8,216,039	$ 8,229,314	$ 8,300,436