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Consolidated Statements of Cash Flows (Unaudited) (USD $)
In Millions, unless otherwise specified
 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Cash flows from operating activities:    
Net income $ 1,206 $ 884
Adjustments to reconcile net income to net cash provided by (used in) operating activities:    
Depreciation and amortization 305 273
Deferred income taxes 51 (9)
Equity income in unconsolidated affiliate (36) (23)
Dividend from unconsolidated affiliate 61 45
Other, net 43 33
Change in operating assets and liabilities, net of acquisitions:    
Receivables (162) (379)
Inventories (785) (363)
Costs in excess of billings (360) 316
Prepaid and other current assets (168) (110)
Accounts payable 107 88
Billings in excess of costs 210 267
Income taxes payable (557) (245)
Other assets/liabilities, net (232) 110
Net cash provided by (used in) operating activities (317) 887
Cash flows from investing activities:    
Purchases of property, plant and equipment (253) (192)
Business acquisitions, net of cash acquired (2,014) (259)
Dividend from unconsolidated affiliate   13
Other 17 14
Net cash used in investing activities (2,250) (424)
Cash flows from financing activities:    
Borrowings against lines of credit and other debt 939  
Repayments on debt (2) (372)
Cash dividends paid (102) (93)
Proceeds from stock options exercised 93 71
Other 27 16
Net cash provided by (used in) financing activities 955 (378)
Effect of exchange rates on cash (6) 22
Increase (decrease) in cash and cash equivalents (1,618) 107
Cash and cash equivalents, beginning of period 3,535 3,333
Cash and cash equivalents, end of period 1,917 3,440
Cash payments during the period for:    
Interest 12 30
Income taxes $ 1,021 $ 712