Condensed Consolidated Statements of Cash Flows Reconciliation of Net Earnings to Net Cash Provided by Operating Activities (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Reconciliation of net earnings to net cash provided by operating activities
Net earnings	$ 1,445	$ 1,570
Net earnings from discontinued operations	0	(34)
Adjustments to reconcile to net cash provided by operating activities:
Depreciation	325	334
Amortization	46	53
Stock-based compensation	111	97
Excess tax benefits from stock-based compensation	(41)	(24)
(Increase) decrease in assets:
Accounts receivable, net	(27)	(20)
Inventoried costs, net	224	22
Prepaid expenses and other assets	(90)	11
Increase (decrease) in liabilities:
Accounts payable and accruals	(370)	(848)
Deferred income taxes	47	205
Income taxes payable	32	4
Retiree benefits	(99)	(416)
Other, net	(20)	72
Cash provided by continuing operations	1,583	1,026
Cash used in discontinued operations	0	(232)
Net cash provided by operating activities	$ 1,583	$ 794