Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities - continuing operations:
Net earnings	$ 2,533us-gaap_NetIncomeLoss	$ 2,357us-gaap_NetIncomeLoss	$ (332)us-gaap_NetIncomeLoss
Adjustments to reconcile net earnings (loss) to net cash provided by operating activities:
Depreciation of property, plant and equipment	375us-gaap_Depreciation	382us-gaap_Depreciation	376us-gaap_Depreciation
Amortization of intangible assets	121us-gaap_AmortizationOfIntangibleAssets	143us-gaap_AmortizationOfIntangibleAssets	214us-gaap_AmortizationOfIntangibleAssets
Goodwill and intangible asset impairments	0	0	2,295
Stock-based compensation expense	128us-gaap_ShareBasedCompensation	120us-gaap_ShareBasedCompensation	114us-gaap_ShareBasedCompensation
Excess tax benefit from stock-based compensation	(83)	(23)	(29)
Deferred income tax (benefit) provision	136us-gaap_DeferredIncomeTaxExpenseBenefit	115us-gaap_DeferredIncomeTaxExpenseBenefit	(144)us-gaap_DeferredIncomeTaxExpenseBenefit
Discontinued operations, net of tax	140	129	(49)
(Increase) decrease in assets, net of effects of business acquisitions:
Accounts receivable	330	(223)	225
Contracts in process	281gd_IncreaseDecreaseInContractsInProcess	177gd_IncreaseDecreaseInContractsInProcess	149gd_IncreaseDecreaseInContractsInProcess
Inventories	(303)us-gaap_IncreaseDecreaseInInventories	(200)us-gaap_IncreaseDecreaseInInventories	(490)us-gaap_IncreaseDecreaseInInventories
Increase (decrease) in liabilities, net of effects of business acquisitions:
Accounts payable	(161)	(204)	(413)
Customer advances and deposits	691	330	730
Other current liabilities	(246)	(118)	23
Other, net	(214)	126	(63)
Net cash provided by operating activities	3,728	3,111	2,606
Cash flows from investing activities - continuing operations:
Capital expenditures	(521)	(436)	(436)
Purchases of held-to-maturity securities	(500)	0	(260)
Purchases of available-for-sale securities	(136)	(135)	(252)
Sales of available-for-sale securities	135	99	186
Maturities of available-for-sale securities	4	14	110
Other, net	(84)	95	10
Net cash used by investing activities	(1,102)	(363)	(642)
Cash flows from financing activities - continuing operations:
Purchases of common stock	(3,382)	(740)	(602)
Dividends paid	(822)us-gaap_PaymentsOfDividends	(591)us-gaap_PaymentsOfDividends	(893)us-gaap_PaymentsOfDividends
Proceeds from option exercises	547	583	146
Repayment of fixed-rate notes	0us-gaap_RepaymentsOfLongTermDebt	0us-gaap_RepaymentsOfLongTermDebt	(2,400)us-gaap_RepaymentsOfLongTermDebt
Proceeds from fixed-rate notes	0	0	2,382
Other, net	82	23	(15)
Net cash used by financing activities	(3,575)	(725)	(1,382)
Net cash provided (used) by discontinued operations	36	(18)	65
Net (decrease) increase in cash and equivalents	(913)	2,005	647
Cash and equivalents at beginning of year	5,301	3,296	2,649
Cash and equivalents at end of year	$ 4,388	$ 5,301	$ 3,296

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

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The cash inflow associated with maturities (principal being due), prepayments and calls (requests of early payments) on securities not classified as either held-to-maturity securities or trading securities which are classified as available-for-sale securities.

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The net cash inflow or outflow from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

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The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities.

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The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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