CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities:
Net income	$ 2,483	$ 1,985	$ 1,659
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	628	555	507
Deferred income taxes	(97)	(352)	(165)
Stock-based compensation	80	73	66
Excess tax benefit from the exercise of stock options	(25)	(22)	(10)
Equity income in unconsolidated affiliates	(58)	(46)	(36)
Dividend from unconsolidated affiliates	61	45	17
Other	84	69	135
Change in operating assets and liabilities, net of acquisitions:
Receivables	(517)	(696)	(189)
Inventories	(1,061)	(591)	39
Costs in excess of billings	(632)	222	(4)
Prepaid and other current assets	(224)	(44)	15
Accounts payable	(19)	205	40
Billings in excess of costs	324	354	(620)
Income taxes payable	(409)	283	286
Other assets/liabilities, net	2	103	(198)
Net cash provided by operating activities	620	2,143	1,542
Cash flows from investing activities:
Purchases of property, plant and equipment	(583)	(483)	(232)
Business acquisitions, net of cash acquired	(2,880)	(1,038)	(556)
Dividend from unconsolidated affiliate		13	16
Other, net	35	50	29
Net cash used in investing activities	(3,428)	(1,458)	(743)
Cash flows from financing activities:
Borrowings against lines of credit and other debt	5,575		3
Payments against lines of credit and other debt	(2,938)	(391)	(16)
Cash dividends paid	(209)	(191)	(172)
Proceeds from stock options exercised	113	96	73
Excess tax benefit from the exercise of stock options	25	22	10
Other	17
Net cash provided by (used in) financing activities	2,583	(464)	(102)
Effect of exchange rates on cash	9	(19)	14
Increase (decrease) in cash and cash equivalents	(216)	202	711
Cash and cash equivalents, beginning of period	3,535	3,333	2,622
Cash and cash equivalents, end of period	3,319	3,535	3,333
Cash payments during the period for:
Interest	40	44	56
Income taxes	$ 1,572	$ 945	$ 551