Consolidated Statements of Cash Flows Indirect Method (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of net earnings to net cash provided by operating activities
Net earnings	$ 1,952	$ 1,978	$ 2,118
Net earnings from discontinued operations	0	0	32
Adjustments to reconcile to net cash provided by operating activities:
Depreciation and amortization	495	510	544
Stock-based compensation	144	183	140
Excess tax benefits from stock-based compensation	(43)	(45)	(17)
Deferred income taxes	128	78	441
(Increase) decrease in assets:
Accounts receivable, net	171	90	350
Inventoried costs, net	101	46	(2)
Prepaid expenses and other assets	(51)	(65)	16
Increase (decrease) in liabilities:
Accounts payable and accruals	(169)	23	(341)
Income taxes payable	2	(75)	(32)
Retiree benefits	(281)	(71)	(904)
Other, net	34	(12)	66
Cash provided by continuing operations	2,483	2,640	2,347
Cash used in discontinued operations	0	0	(232)
Net cash provided by operating activities	$ 2,483	$ 2,640	$ 2,115