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 earnings	$ (332)	$ 2,526	$ 2,624
Adjustments to reconcile net earnings (loss) to net cash provided by operating activities –
Depreciation of property, plant and equipment	386	354	345
Amortization of intangible assets	234	238	224
Goodwill and intangible asset impairments	2,295	111	0
Stock-based compensation expense	114	128	118
Excess tax benefit from stock-based compensation	(29)	(24)	(18)
Deferred income tax (benefit) provision	(148)	14	56
Discontinued operations, net of tax	0	26	4
(Increase) decrease in assets, net of effects of business acquisitions –
Accounts receivable	240	(397)	(152)
Contracts in process	149	(62)	(334)
Inventories	(478)	(186)	(23)
Increase (decrease) in liabilities, net of effects of business acquisitions –
Accounts payable	(441)	17	366
Customer advances and deposits	730	629	30
Other current liabilities	22	86	(285)
Other, net	(55)	(222)	31
Net cash provided by operating activities	2,687	3,238	2,986
Cash flows from investing activities:
Capital expenditures	(450)	(458)	(370)
Business acquisitions, net of cash acquired	(444)	(1,560)	(233)
Purchases of held-to-maturity securities	(260)	(459)	(468)
Maturities of held-to-maturity securities	224	441	605
Sales of held-to-maturity securities	211	0	0
Purchases of available-for-sale securities	(252)	(373)	(226)
Sales of available-for-sale securities	186	107	78
Maturities of available-for-sale securities	110	235	126
Other, net	19	93	80
Net cash used by investing activities	(656)	(1,974)	(408)
Cash flows from financing activities:
Repayment of fixed-rate notes	(2,400)	(750)	(700)
Proceeds from fixed-rate notes	2,382	1,497	0
Dividends paid	(893)	(673)	(631)
Purchases of common stock	(602)	(1,468)	(1,185)
Proceeds from option exercises	146	198	277
Other, net	(15)	(5)	13
Net cash used by financing activities	(1,382)	(1,201)	(2,226)
Net cash used by discontinued operations	(2)	(27)	(2)
Net increase in cash and equivalents	647	36	350
Cash and equivalents at beginning of year	2,649	2,613	2,263
Cash and equivalents at end of year	$ 3,296	$ 2,649	$ 2,613