CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2010
Current assets:
Cash and cash equivalents	$ 118,702	$ 222,074	$ 36,285
Receivables, net	641,389	583,743	585,487
Inventories	269,569	252,897	261,680
Deferred income taxes	14,713	32,890	25,552
Commodity derivative instruments	38,794	15,123	26,803
Prepayments and other current assets	48,851	60,441	99,716
Total current assets	1,132,018	1,167,168	1,035,523
Investments	109,249	103,661	152,577
Property, plant and equipment	7,506,833	7,218,503	7,163,515
Less accumulated depreciation, depletion and amortization	3,307,433	3,103,323	3,056,127
Net property, plant and equipment	4,199,400	4,115,180	4,107,388
Deferred charges and other assets:
Goodwill	634,931	634,633	634,633
Other intangible assets, net	22,248	25,271	26,112
Other	262,107	257,636	260,722
Total deferred charges and other assets	919,286	917,540	921,467
Total assets	6,359,953	6,303,549	6,216,955
Current liabilities:
Short-term borrowings	0	20,000	4,700
Long-term debt due within one year	76,600	72,797	73,417
Accounts payable	305,695	301,132	299,094
Taxes payable	77,190	56,186	46,928
Dividends payable	30,850	30,773	29,810
Accrued compensation	44,100	40,121	41,648
Commodity derivative instruments	3,028	24,428	25,803
Other accrued liabilities	226,986	222,639	205,777
Total current liabilities	764,449	768,076	727,177
Long-term debt	1,347,014	1,433,955	1,437,171
Deferred credits and other liabilities:
Deferred income taxes	746,946	672,269	672,155
Other liabilities	710,465	736,447	718,331
Total deferred credits and other liabilities	1,457,411	1,408,716	1,390,486
Stockholders' equity :
Preferred stocks	15,000	15,000	15,000
Common stockholders' equity:
Common stock Shares issued -- $1.00 par value, 189,332,485 at September 30, 2011, 188,732,200 at September 30, 2010 and 188,901,379 at December 31, 2010	189,332	188,901	188,732
Other paid-in capital	1,034,411	1,026,349	1,022,469
Retained earnings	1,556,550	1,497,439	1,439,050
Accumulated other comprehensive income (loss)	(588)	(31,261)	496
Treasury stock at cost - 538,921 shares	(3,626)	(3,626)	(3,626)
Total common stockholders' equity	2,776,079	2,677,802	2,647,121
Total stockholders' equity	2,791,079	2,692,802	2,662,121
Total liabilities and stockholders' equity	$ 6,359,953	$ 6,303,549	$ 6,216,955