CONDENSED CONSOLIDATED BALANCE SHEET (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
CURRENT ASSETS, VIEs
Cash and cash equivalents	$ 1,870,874	$ 1,997,199
Marketable securities, current	6,477	7,262
Accounts and notes receivable	1,097,800	1,217,464
Contract assets	1,310,686	1,238,173
Other current assets	477,013	389,565
Noncurrent assets
Net property, plant and equipment	567,148	552,856
Other noncurrent assets	429,483	491,917
CURRENT LIABILITIES, VIEs
Trade accounts payable	1,443,280	1,546,840
Accrued salaries, wages and benefits	586,807	609,094
Other accrued liabilities	425,897	470,351
Other noncurrent liabilities ($10,468 and $11,366 related to VIEs)	$ 645,165	$ 742,410
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)	140,533,363	140,174,400
Common stock, outstanding shares (in shares)	140,533,363	140,174,400
Consolidated variable interest entities
CURRENT ASSETS, VIEs
Cash and cash equivalents	$ 441,709	$ 392,772
Marketable securities, current	66	66
Accounts and notes receivable	279,915	329,548
Contract assets	282,050	294,116
Other current assets	21,166	32,271
Noncurrent assets
Net property, plant and equipment	28,841	29,492
Other noncurrent assets	44,265	45,425
CURRENT LIABILITIES, VIEs
Trade accounts payable	379,524	501,525
Advance billings on contracts	289,616	232,160
Accrued salaries, wages and benefits	31,253	31,178
Other accrued liabilities	44,185	21,088
Other noncurrent liabilities ($10,468 and $11,366 related to VIEs)	$ 10,468	$ 11,366