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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Millions, unless otherwise specified
 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Cash flows from operating activities:    
Net income $ 1,667 $ 1,815
Adjustments to reconcile net income to net cash provided by (used in) operating activities:    
Depreciation and amortization 555 462
Deferred income taxes (91) 40
Equity income in unconsolidated affiliates (47) (43)
Dividend from unconsolidated affiliate 66 61
Other, net 93 76
Change in operating assets and liabilities, net of acquisitions:    
Receivables (389) (251)
Inventories (47) (1,152)
Costs in excess of billings (415) (472)
Prepaid and other current assets (18) (254)
Accounts payable 46 165
Billings in excess of costs 364 173
Income taxes payable (93) (569)
Other assets/liabilities, net 188 (231)
Net cash provided by (used in) operating activities 1,879 (180)
Cash flows from investing activities:    
Purchases of property, plant and equipment (484) (382)
Business acquisitions, net of cash acquired (2,397) (2,305)
Other 69 24
Net cash used in investing activities (2,812) (2,663)
Cash flows from financing activities:    
Borrowings against lines of credit and other debt 2,357 1,019
Repayments on debt (1,758) (3)
Cash dividends paid (278) (153)
Proceeds from stock options exercised 25 111
Other 17 31
Net cash provided by financing activities 363 1,005
Effect of exchange rates on cash (8) 5
Decrease in cash and cash equivalents (578) (1,833)
Cash and cash equivalents, beginning of period 3,319 3,535
Cash and cash equivalents, end of period 2,741 1,702
Cash payments during the period for:    
Interest 64 21
Income taxes $ 886 $ 1,320