Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating Activities
Net earnings	$ 579	$ 489
Adjustments to reconcile to net cash (used in) provided by operating activities:
Depreciation and amortization	109	110
Stock-based compensation	22	24
Excess tax benefits from stock-based compensation	(68)	(17)
Deferred income taxes	40	31
(Increase) decrease in assets:
Accounts receivable, net	(531)	(195)
Inventoried costs, net	(66)	(125)
Prepaid expenses and other assets	(6)	(9)
Increase (decrease) in liabilities:
Accounts payable and accruals	(755)	(560)
Income taxes payable	279	209
Retiree benefits	14	71
Other, net	(19)	(27)
Net Cash (used in) provided by operating activities	(402)	1
Investing activities
Capital expenditures	(60)	(40)
Other investing activities, net	(72)	2
Net cash used in investing activities	(132)	(38)
Financing activities
Common stock repurchases	(570)	(456)
Cash dividends paid	(132)	(130)
Other financing activities, net	(29)	(56)
Net cash used in financing activities	(731)	(642)
Decrease in cash and cash equivalents	(1,265)	(679)
Cash and cash equivalents, beginning of year	5,150	3,862
Cash and cash equivalents, end of period	$ 3,885	$ 3,183