CONSOLIDATED BALANCE SHEET - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
CURRENT ASSETS
Cash and cash equivalents ($289,991 and $352,996 related to variable interest entities ("VIEs"))	$ 1,949,886	$ 1,993,125
Marketable securities, current ($70,176 and $14,082 related to VIEs)	197,092	105,131
Accounts and notes receivable, net ($186,833 and $193,565 related to VIEs)	1,203,024	1,471,705
Contract work in progress ($178,826 and $166,334 related to VIEs)	1,376,471	1,587,275
Deferred taxes	172,887	340,223
Other current assets ( $27,362 and $38,848 related to VIEs)	378,927	260,588
Total current assets	5,278,287	5,758,047
PROPERTY, PLANT AND EQUIPMENT
Land	72,244	84,274
Buildings and improvements	434,213	454,641
Machinery and equipment	1,252,615	1,305,623
Furniture and fixtures	135,701	142,961
Construction in progress	43,644	73,962
Gross property, plant and equipment	1,938,417	2,061,461
Less accumulated depreciation	1,046,077	1,081,198
Net property, plant and equipment ( $70,247 and $77,579 related to VIEs)	892,340	980,263
OTHER ASSETS
Marketable securities, noncurrent	220,634	343,644
Goodwill	111,646	112,952
Investments	337,930	189,805
Deferred taxes	221,945	201,004
Deferred compensation trusts	360,725	405,022
Other assets ( $24,141 and $24,003 related to VIEs)	207,999	203,692
Total other assets	1,460,879	1,456,119
TOTAL ASSETS	7,631,506	8,194,429
CURRENT LIABILITIES
Trade accounts payable ($178,139 and $213,837 related to VIEs)	1,266,509	1,422,084
Convertible senior notes and other borrowings		28,742
Advance billings on contracts ($188,484 and $151,321 related to VIEs)	754,037	569,418
Accrued salaries, wages and benefits ($47,526 and $51,749 related to VIEs)	669,592	725,586
Other accrued liabilities ($25,384 and $21,709 related to VIEs)	245,214	585,023
Total current liabilities	2,935,352	3,330,853
LONG-TERM DEBT DUE AFTER ONE YEAR	992,664	991,685
NONCURRENT LIABILITIES	$ 589,991	$ 648,061
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 - 139,018,309 and 148,633,640 shares in 2015 and 2014, respectively	$ 1,390	$ 1,486
Accumulated other comprehensive loss	(432,775)	(484,212)
Retained earnings	3,428,732	3,593,597
Total shareholders' equity	2,997,347	3,110,871
Noncontrolling interests	116,152	112,959
Total equity	3,113,499	3,223,830
TOTAL LIABILITIES AND EQUITY	$ 7,631,506	$ 8,194,429