CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 354,022	$ 398,575
Short-term investments	139,950	140,914
Assets held for sale	433,446	401,500
Accounts receivable, net	1,717,375	1,576,555
Inventory	265,787	272,852
Deferred income taxes	45,038	127,874
Other current assets	173,606	170,044
Total current assets	3,129,224	3,088,314
Long-term investments and other receivables	6,373	11,124
Property, plant and equipment, net	8,814,081	8,629,946
Goodwill	501,536	501,258
Investment in unconsolidated affiliates	303,103	371,021
Other long-term assets	393,877	310,477
Total assets	13,148,194	12,912,140
Current liabilities:
Current portion of long-term debt	275,616	275,326
Trade accounts payable	687,576	782,753
Accrued liabilities	586,911	716,773
Income taxes payable	30,938	27,710
Total current liabilities	1,581,041	1,802,562
Long-term debt	4,497,725	4,348,490
Other long-term liabilities	322,003	292,758
Deferred income taxes	855,057	797,925
Total liabilities	7,255,826	7,241,735
Commitments and contingencies (Note 11)
Subsidiary preferred stock	69,188	69,188
Shareholders' equity:
Common shares, par value $.001 per share: Authorized common shares 800,000; issued 318,731 and 317,042, respectively	318	317
Capital in excess of par value	2,322,315	2,287,743
Accumulated other comprehensive income	342,463	321,264
Retained earnings	4,090,454	3,956,364
Less: treasury shares, at cost, 28,414 and 29,414 common shares, respectively	(944,627)	(977,873)
Total shareholders' equity	5,810,923	5,587,815
Noncontrolling interest	12,257	13,402
Total equity	5,823,180	5,601,217
Total liabilities and equity	$ 13,148,194	$ 12,912,140