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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Cash flows from operating activities:    
Income from continuing operations $ 599 $ 1,157
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 380 381
Deferred income taxes 26 (57)
Equity income in unconsolidated affiliates (16) (33)
Dividend from unconsolidated affiliate 34 73
Other, net 162 127
Change in operating assets and liabilities, net of acquisitions:    
Receivables 907 (123)
Inventories (192) (516)
Costs in excess of billings 68 (28)
Prepaid and other current assets 41 (48)
Accounts payable (343) 101
Billings in excess of costs (507) 405
Income taxes payable (406) (295)
Other assets/liabilities, net (445) 126
Net cash provided by continuing operating activities 308 1,270
Discontinued operations   89
Net cash provided by operating activities 308 1,359
Cash flows from investing activities:    
Purchases of property, plant and equipment (234) (300)
Business acquisitions, net of cash acquired (44) (102)
Cash distributed in spin-off   (253)
Other 6 13
Net cash used in continuing investing activities (272) (642)
Discontinued operations   (12)
Net cash used in investing activities (272) (654)
Cash flows from financing activities:    
Borrowings against lines of credit and other debt 4,751 151
Repayments on debt (3,612) (151)
Cash dividends paid (363) (309)
Share repurchases (1,777)  
Proceeds from stock options exercised 5 34
Other (1) 12
Net cash used in continuing financing activities (997) (263)
Discontinued operations 0 0
Net cash used in financing activities (997) (263)
Effect of exchange rates on cash (31) 7
Increase (decrease) in cash and cash equivalents (992) 449
Cash and cash equivalents, beginning of period 3,536 3,436
Cash and cash equivalents, end of period 2,544 3,885
Cash payments during the period for:    
Interest 50 53
Income taxes $ 660 $ 886