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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Cash flows from operating activities:    
Net income (loss) $ (118) $ 313
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Depreciation and amortization 175 190
Deferred income taxes (135) (7)
Equity (income) loss in unconsolidated affiliates 6 (9)
Other, net 83 91
Change in operating assets and liabilities, net of acquisitions:    
Receivables 706 369
Inventories 112 (126)
Costs in excess of billings 210 (47)
Prepaid and other current assets (11) 34
Accounts payable (157) (201)
Accrued liabilities (231) (224)
Billings in excess of costs (81) (278)
Income taxes payable (65) 1
Other assets/liabilities, net 127 8
Net cash provided by operating activities 621 114
Cash flows from investing activities:    
Purchases of property, plant and equipment (84) (130)
Business acquisitions, net of cash acquired (21) (23)
Other 2 4
Net cash used in investing activities (103) (149)
Cash flows from financing activities:    
Borrowings against lines of credit and other debt 2,368 1,871
Payments against lines of credit and other debt (3,052) (792)
Cash dividends paid (173) (185)
Share repurchases   (1,330)
Proceeds from stock options exercised 1 3
Other (5) (3)
Net cash used in financing activities (861) (436)
Effect of exchange rates on cash 22 (41)
Increase (decrease) in cash and cash equivalents (321) (512)
Cash and cash equivalents, beginning of period 2,080 3,536
Cash and cash equivalents, end of period 1,759 3,024
Cash payments (receipts) during the period for:    
Interest 3 6
Income taxes $ (32) $ 96