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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Cash flows from operating activities:    
Net income (loss) $ (335) $ 599
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Depreciation and amortization 353 380
Deferred income taxes (288) 26
Equity (income) loss in unconsolidated affiliates 13 (16)
Dividend from unconsolidated affiliate 6 34
Other, net 195 162
Change in operating assets and liabilities, net of acquisitions:    
Receivables 858 907
Inventories 320 (192)
Costs in excess of billings 460 68
Prepaid and other current assets 70 41
Accounts payable (190) (343)
Accrued liabilities (514) (498)
Billings in excess of costs (132) (507)
Income taxes payable (190) (406)
Other assets/liabilities, net 123 53
Net cash provided by operating activities 749 308
Cash flows from investing activities:    
Purchases of property, plant and equipment (161) (234)
Business acquisitions, net of cash acquired (36) (44)
Other 3 6
Net cash used in investing activities (194) (272)
Cash flows from financing activities:    
Borrowings against lines of credit and other debt 2,963 4,751
Payments against lines of credit and other debt (3,748) (3,612)
Cash dividends paid (192) (363)
Share repurchases   (1,777)
Proceeds from stock options exercised 1 5
Other (14) (1)
Net cash used in financing activities (990) (997)
Effect of exchange rates on cash 16 (31)
Decrease in cash and cash equivalents (419) (992)
Cash and cash equivalents, beginning of period 2,080 3,536
Cash and cash equivalents, end of period 1,661 2,544
Cash payments during the period for:    
Interest 53 50
Income taxes $ 120 $ 660