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Consolidated Statements of Cash Flows (Unaudited) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Cash flows from operating activities:    
Net income $ 604 $ 404
Adjustments to reconcile net income to net cash used in operating activities:    
Depreciation and amortization 148 135
Deferred income taxes 119 95
Equity income in unconsolidated affiliates (17) (13)
Other, net   12
Change in operating assets and liabilities, net of acquisitions:    
Receivables (40) (321)
Inventories (492) (200)
Costs in excess of billings (217) 70
Prepaid and other current assets (99) (51)
Accounts payable 102 15
Billings in excess of costs 100 60
Other assets/liabilities, net (272) (231)
Net cash used in operating activities (64) (25)
Cash flows from investing activities:    
Purchases of property, plant and equipment (113) (79)
Business acquisitions, net of cash acquired (58) (51)
Other 11 7
Net cash used in investing activities (160) (123)
Cash flows from financing activities:    
Repayments on debt (1) (170)
Cash dividends paid (51) (46)
Proceeds from stock options exercised 88 58
Other 22 14
Net cash provided by (used in) financing activities 58 (144)
Effect of exchange rates on cash 21 19
Decrease in cash and cash equivalents (145) (273)
Cash and cash equivalents, beginning of period 3,535 3,333
Cash and cash equivalents, end of period 3,390 3,060
Cash payments during the period for:    
Interest 6 12
Income taxes $ 224 $ 266