CONDENSED CONSOLIDATED BALANCE SHEET (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
CURRENT ASSETS
Cash and cash equivalents ($486,805 and $411,550 related to variable interest entities ("VIEs"))	$ 2,105,076	$ 2,154,541
Marketable securities, current ($50,430 and $30,369 related to VIEs)	192,188	137,127
Accounts and notes receivable, net ($212,144 and $193,354 related to VIEs)	1,355,841	1,242,691
Contract work in progress ($223,939 and $221,897 related to VIEs)	1,974,529	1,942,679
Deferred taxes	251,374	249,839
Other current assets	307,531	367,260
Total current assets	6,186,539	6,094,137
Marketable securities, noncurrent	298,863	318,355
Property, plant and equipment ((net of accumulated depreciation of $1,075,284 and $1,032,509) ($101,949 and $105,692 related to VIEs))	929,275	951,255
Investments and goodwill	288,244	244,226
Deferred taxes	77,174	79,357
Deferred compensation trusts	349,175	332,904
Other	238,327	255,809
TOTAL ASSETS	8,367,597	8,276,043
CURRENT LIABILITIES
Trade accounts payable ($294,147 and $295,972 related to VIEs)	1,900,848	1,954,108
Convertible senior notes and other notes payable	18,469	20,792
Advance billings on contracts ($266,492 and $300,491 related to VIEs)	742,422	870,147
Accrued salaries, wages and benefits ($95,688 and $59,183 related to VIEs)	747,675	755,075
Other accrued liabilities ($25,707 and $6,478 related to VIEs)	283,129	286,992
Total current liabilities	3,692,543	3,887,114
LONG-TERM DEBT DUE AFTER ONE YEAR	496,384	520,205
NONCURRENT LIABILITIES	438,838	441,630
CONTINGENCIES AND COMMITMENTS
Capital stock
Preferred - authorized 20,000,000 shares ($0.01 par value); none issued
Common - authorized 375,000,000 shares ($0.01 par value); issued and outstanding - 163,032,682 and 162,359,906 shares in 2013 and 2012, respectively	1,630	1,624
Additional paid-in capital	27,569
Accumulated other comprehensive loss	(302,673)	(257,850)
Retained earnings	3,873,124	3,597,521
Total shareholders' equity	3,599,650	3,341,295
Noncontrolling interests	140,182	85,799
Total equity	3,739,832	3,427,094
TOTAL LIABILITIES AND EQUITY	$ 8,367,597	$ 8,276,043