Condensed Consolidated Balance Sheets (Unaudited, except for December 31) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011
Assets
Cash and cash equivalents	$ 158,301	$ 155,839	$ 106,744
Restricted cash	0	81	109
Accounts and notes receivable
Accounts and notes receivable, gross	397,506	321,391	397,423
Less: Allowance for doubtful accounts	(7,375)	(6,498)	(7,641)
Accounts and notes receivable, net	390,131	314,893	389,782
Inventories
Finished products	266,265	260,732	259,109
Raw materials	24,457	23,819	26,300
Products in process	3,974	4,198	4,930
Operating supplies and other	39,910	38,908	38,926
Inventories	334,606	327,657	329,265
Current deferred income taxes	43,357	43,032	45,704
Prepaid expenses	24,840	21,598	22,394
Total current assets	951,235	863,100	893,998
Investments and long-term receivables	28,506	29,004	37,251
Property, plant & equipment
Property, plant & equipment, cost	6,697,685	6,705,546	6,739,908
Reserve for depreciation, depletion & amortization	(3,419,174)	(3,287,367)	(3,197,163)
Property, plant & equipment, net	3,278,511	3,418,179	3,542,745
Goodwill	3,086,716	3,086,716	3,097,016
Other intangible assets, net	694,972	697,502	694,509
Other noncurrent assets	140,135	134,813	121,736
Total assets	8,180,075	8,229,314	8,387,255
Liabilities
Current maturities of long-term debt	285,152	134,762	5,230
Short-term borrowings	0	0	100,000
Trade payables and accruals	171,834	103,931	153,729
Other current liabilities	159,481	167,560	178,677
Total current liabilities	616,467	406,253	437,636
Long-term debt	2,528,387	2,680,677	2,785,843
Noncurrent deferred income taxes	687,337	732,528	756,557
Other noncurrent liabilities	604,948	618,239	535,136
Total liabilities	4,437,139	4,437,697	4,515,172
Other commitments and contingencies (Note 18)
Equity
Common stock, $1 par value	129,393	129,245	129,224
Capital in excess of par value	2,560,824	2,544,740	2,534,562
Retained earnings	1,261,501	1,334,476	1,376,026
Accumulated other comprehensive loss	(208,782)	(216,844)	(167,729)
Total equity	3,742,936	3,791,617	3,872,083
Total liabilities and equity	$ 8,180,075	$ 8,229,314	$ 8,387,255