Condensed Consolidated Statements of Cash Flows Reconciliation of Net Earnings to Net Cash Used In Operating Activities (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Reconciliation of net earnings to net cash used in operating activities
Net earnings	$ 506	$ 530
Net earnings from discontinued operations	0	(34)
Adjustments to reconcile to net cash provided by operating activities:
Depreciation	105	103
Amortization	15	18
Stock-based compensation	26	33
Excess tax benefits from stock-based compensation	(27)	(9)
(Increase) decrease in assets:
Accounts receivable, net	(267)	(245)
Inventoried costs, net	60	30
Prepaid expenses and other assets	(119)	(3)
Increase (decrease) in liabilities:
Accounts payable and accruals	(635)	(627)
Deferred income taxes	0	19
Income taxes payable	169	289
Retiree benefits	77	34
Other, net	(15)	(26)
Cash (used in) provided by continuing operations	(105)	112
Cash used in discontinued operations	0	(232)
Net cash used in operating activities	$ (105)	$ (120)