Consolidated Statements of Cash Flows Indirect Method (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Reconciliation of net earnings to net cash provided by operating activities
Net earnings	$ 1,978	$ 2,118	$ 2,053
Net earnings from discontinued operations	0	(32)	(134)
Adjustments to reconcile to net cash provided by operating activities:
Depreciation	448	462	446
Amortization	62	82	109
Stock-based compensation	183	140	136
Excess tax benefits from stock-based compensation	(45)	(17)	(22)
Pre-tax gain on sale of businesses	0	0	(10)
Charge on debt redemption	0	0	229
(Increase) decrease in assets:
Accounts receivable, net	90	350	(471)
Inventoried costs, net	46	(2)	(64)
Prepaid expenses and other assets	(65)	16	36
Increase (decrease) in liabilities:
Accounts payable and accruals	23	(341)	70
Deferred income taxes	78	441	89
Income taxes payable	(75)	(32)	(26)
Retiree benefits	(71)	(904)	(354)
Other, net	(12)	66	(31)
Cash provided by continuing operations	2,640	2,347	2,056
Cash (used in) provided by discontinued operations	0	(232)	397
Net cash provided by operating activities	$ 2,640	$ 2,115	$ 2,453