Postretirement Plans (Schedule Of Net Periodic Benefit Cost) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Non-cash FAS/CAS Pension Adjustment	$ 922		$ 454		$ 456
Qualified Defined Benefit Pension Plans [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Service cost	974	[1]	903	[1]	870	[1]
Interest cost	1,918	[1]	1,876	[1]	1,812	[1]
Expected return on plan assets	(2,033)	[1]	(2,027)	[1]	(2,028)	[1]
Recognized net actuarial losses	880	[1]	595	[1]	302	[1]
Amortization of prior service cost	82	[1]	83	[1]	80	[1]
Curtailment			12	[1]
Total net expense	1,821	[1]	1,442	[1]	1,036	[1]
Retiree Medical And Life Insurance Plans [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Service cost	32		36		34
Interest cost	162		166		165
Expected return on plan assets	(140)		(129)		(106)
Recognized net actuarial losses	34		25		42
Amortization of prior service cost	(16)		(16)		(23)
Total net expense	$ 72		$ 82		$ 112

[1] Total net periodic benefit cost associated with our qualified defined benefit plans represents pension expense calculated in accordance with GAAP (FAS expense). We are required to calculate pension expense in accordance with both GAAP and CAS rules, each of which results in a different calculated amount of pension expense. The CAS expense is recovered through the pricing of our products and services on U.S. Government contracts and, therefore, is recognized in net sales and cost of sales for products and services. We include the difference between FAS expense and CAS expense, referred to as the non-cash FAS/CAS pension adjustment ($922 million in 2011, $454 million in 2010, and $456 million in 2009), as a component of other unallocated corporate costs on our Statements of Earnings. The non-cash FAS/CAS pension adjustment effectively adjusts the amount of pension expense in the results of operations so that pension expense recorded on our Statements of Earnings is equal to FAS expense.