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Supplemental Cash Flow Information - Net Effects of Changes in Operating Assets and Liabilities, Net, on Cash Flows from Operating Activities (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Supplemental Cash Flow Elements [Abstract]      
Accounts and notes receivable $ (214,580) $ (475,919) $ (425,313)
Contract assets (12,317) (92,838) 15,999
Inventories 52,168 (28,131) 14,110
Prepaid expenses and other current assets (60,475) (40,187) (32,079)
Accounts payable and accrued expenses and other non-current liabilities 39,419 247,897 28,547
Contract liabilities 174,230 (23) 139,114
Other, net (135,250) (11,332) 17,858
Net change in operating assets and liabilities, net of non-cash transactions (156,805) $ (400,533) $ (241,764)
Payments of on-demand advance payment bonds 87,000    
Payments of on-demand performance bonds $ 25,000