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Consolidated Statements of Cash Flows - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Cash flows from operating activities:      
Net loss $ (236) $ (2,416) $ (767)
Adjustments to reconcile net loss to net cash provided by operating activities:      
Depreciation and amortization 698 703 747
Deferred income taxes (341) (198) (258)
Stock-based compensation 124 107 109
Excess tax benefit from stock-based compensation   7 1
Equity (income) loss in unconsolidated affiliates 5 21 (13)
Dividend from unconsolidated affiliate   6 34
Goodwill and intangible asset impairment   972 1,689
Provision for inventory losses 114 606 186
Other, net 20 108 70
Change in operating assets and liabilities, net of acquisitions:      
Receivables 72 845 1,091
Inventories 229 782 410
Costs in excess of billings 170 646 548
Prepaid and other current assets 130 102 112
Accounts payable 86 (243) (570)
Accrued liabilities (130) (773) (1,137)
Billings in excess of costs (160) (366) (686)
Income taxes payable (44) (146) (167)
Other assets/liabilities, net 95 197 (67)
Net cash provided by operating activities 832 960 1,332
Cash flows from investing activities:      
Purchases of property, plant and equipment (192) (284) (453)
Business acquisitions, net of cash acquired (86) (230) (86)
Other, net 33 26 25
Net cash used in investing activities (245) (488) (514)
Cash flows from financing activities:      
Borrowings against lines of credit and other debt   3,972 11,377
Payments against lines of credit and other debt (506) (4,872) (10,615)
Cash dividends paid (76) (230) (710)
Share repurchases     (2,221)
Activity under stock incentive plans (3) 4 7
Excess tax benefit from stock-based compensation   (7) (1)
Other (10) (8)  
Net cash used in financing activities (595) (1,141) (2,163)
Effect of exchange rates on cash 37 (3) (111)
Increase (decrease) in cash and cash equivalents 29 (672) (1,456)
Cash and cash equivalents, beginning of period 1,408 2,080 3,536
Cash and cash equivalents, end of period 1,437 1,408 2,080
Cash payments during the period for:      
Interest 97 101 103
Income taxes $ 50 $ 181 $ 782