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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Cash flows from operating activities:    
Net income $ 500 $ 604
Adjustments to reconcile net income to net cash provided by (used in) operating activities:    
Depreciation and amortization 174 148
Deferred income taxes (33) 119
Equity income in unconsolidated affiliates (19) (17)
Other, net 18  
Change in operating assets and liabilities, net of acquisitions:    
Receivables 208 (40)
Inventories (13) (492)
Costs in excess of billings (108) (217)
Prepaid and other current assets 130 (99)
Accounts payable (8) 102
Billings in excess of costs (97) 100
Other assets/liabilities, net (246) (272)
Net cash provided by (used in) operating activities 506 (64)
Cash flows from investing activities:    
Purchases of property, plant and equipment (168) (113)
Business acquisitions, net of cash acquired (2,375) (58)
Other 8 11
Net cash used in investing activities (2,535) (160)
Cash flows from financing activities:    
Borrowings against lines of credit and other debt 1,386  
Repayments on debt (186) (1)
Cash dividends paid (56) (51)
Proceeds from stock options exercised 5 88
Other 13 22
Net cash provided by financing activities 1,162 58
Effect of exchange rates on cash (11) 21
Decrease in cash and cash equivalents (878) (145)
Cash and cash equivalents, beginning of period 3,319 3,535
Cash and cash equivalents, end of period 2,441 3,390
Cash payments during the period for:    
Interest 7 6
Income taxes $ 171 $ 224