Consolidated Statement Of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash flows from operating activities:
Net earnings	$ 2,526	$ 2,624	$ 2,394
Adjustments to reconcile net earnings to net cash provided by operating activities-
Depreciation of property, plant and equipment	354	345	344
Amortization of intangible assets	238	224	218
Intangible asset impairment	111
Stock-based compensation expense	128	118	117
Excess tax benefit from stock-based compensation	(24)	(18)	(5)
Deferred income tax provision	14	56	227
Discontinued operations, net of tax	26	4	13
Increase in assets, net of effects of business acquisitions-
Accounts receivable	(420)	(152)	(151)
Contracts in process	(62)	(334)	(112)
Inventories	(186)	(23)	(72)
Increase (decrease) in liabilities, net of effects of business acquisitions-
Accounts payable	17	366	(92)
Customer advances and deposits	629	30	145
Other current liabilities	86	(285)	(306)
Other, net	(199)	31	135
Net cash provided by operating activities	3,238	2,986	2,855
Cash flows from investing activities:
Business acquisitions, net of cash acquired	(1,560)	(233)	(811)
Purchases of held-to-maturity securities	(459)	(468)	(337)
Maturities of held-to-maturity securities	441	605
Capital expenditures	(458)	(370)	(385)
Purchases of available-for-sale securities	(373)	(226)	(152)
Maturities of available-for-sale securities	235	126	179
Other, net	200	158	114
Net cash used by investing activities	(1,974)	(408)	(1,392)
Cash flows from financing activities:
Proceeds from fixed-rate notes	1,497		747
Purchases of common stock	(1,468)	(1,185)	(209)
Repayment of fixed-rate notes	(750)	(700)
Dividends paid	(673)	(631)	(577)
Proceeds from option exercises	198	277	142
Repayment of commercial paper			(904)
Other, net	(5)	13	(5)
Net cash used by financing activities	(1,201)	(2,226)	(806)
Net cash used by discontinued operations	(27)	(2)	(15)
Net increase in cash and equivalents	36	350	642
Cash and equivalents at beginning of year	2,613	2,263	1,621
Cash and equivalents at end of year	$ 2,649	$ 2,613	$ 2,263