CONDENSED CONSOLIDATED BALANCE SHEET (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
CURRENT ASSETS, VIEs
Cash and cash equivalents	$ 1,969,593	$ 1,997,199
Marketable securities, current	12,711	7,262
Accounts and notes receivable	1,146,761	1,217,464
Contract assets ($266,485 and $294,116 related to VIEs)	1,069,507	1,238,173
Other current assets	459,979	389,565
NONCURRENT ASSETS, VIEs
Net property, plant and equipment	568,606	594,826
Other noncurrent assets	416,399	491,917
CURRENT LIABILITIES, VIEs
Trade accounts payable	1,428,785	1,546,840
Accrued salaries, wages and benefits	570,416	609,094
Other accrued liabilities	$ 475,113	$ 470,350
Shareholders' equity
Preferred stock, authorized shares (in shares)	20,000,000	20,000,000
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, issued shares (in shares)	0	0
Common stock, authorized shares (in shares)	375,000,000	375,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, issued shares (in shares)	140,565,020	140,174,400
Common stock, outstanding shares (in shares)	140,565,020	140,174,400
Consolidated variable interest entities
CURRENT ASSETS, VIEs
Cash and cash equivalents	$ 547,487	$ 392,772
Marketable securities, current	66	66
Accounts and notes receivable	245,081	329,548
Contract assets ($266,485 and $294,116 related to VIEs)	266,485	294,116
Other current assets	25,943	32,271
NONCURRENT ASSETS, VIEs
Net property, plant and equipment	35,004	29,492
Other noncurrent assets	43,218	45,425
CURRENT LIABILITIES, VIEs
Trade accounts payable	414,453	501,525
Advance billings on contracts	262,786	232,160
Accrued salaries, wages and benefits	31,975	31,178
Other accrued liabilities	$ 65,598	$ 21,088