Condensed Consolidated Statements of Cash Flows Reconciliation of Net Earnings to Net Cash Used In Operating Activities (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Reconciliation of net earnings to net cash provided by (used in) operating activities
Net earnings	$ 986	$ 1,050
Net earnings from discontinued operations	0	(34)
Adjustments to reconcile to net cash provided by (used in) operating activities:
Depreciation	212	218
Amortization	31	37
Stock-based compensation	76	66
Excess tax benefits from stock-based compensation	(29)	(21)
(Increase) decrease in assets:
Accounts receivable, net	(175)	(164)
Inventoried costs, net	143	6
Prepaid expenses and other assets	(95)	5
Increase (decrease) in liabilities:
Accounts payable and accruals	(453)	(757)
Deferred income taxes	(21)	79
Income taxes payable	(22)	9
Retiree benefits	137	(440)
Other, net	(19)	24
Cash provided by continuing operations	771	78
Cash used in discontinued operations	0	(232)
Net cash provided by (used in) operating activities	$ 771	$ (154)