Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Operating Activities
Net earnings	$ 1,015	$ 1,090
Adjustments to reconcile to net cash (used in) provided by operating activities:
Depreciation and amortization	216	217
Stock-based compensation	47	51
Excess tax benefits from stock-based compensation	(106)	(74)
Deferred income taxes	139	21
Changes in assets and liabilities:
Accounts receivable, net	(344)	(577)
Inventoried costs, net	(117)	(33)
Prepaid expenses and other assets	48	(23)
Accounts payable and other liabilities	(870)	(588)
Income taxes payable	314	103
Retiree benefits	(378)	8
Other, net	8	(25)
Net cash (used in) provided by operating activities	(28)	170
Investing activities
Capital expenditures	(232)	(176)
Other investing activities, net	(2)	(72)
Net cash used in investing activities	(234)	(248)
Financing activities
Common stock repurchases	(1,916)	(1,301)
Net proceeds from issuance of long-term debt	600	0
Cash dividends paid	(309)	(280)
Other financing activities, net	(69)	(15)
Net cash used in financing activities	(1,694)	(1,596)
Decrease in cash and cash equivalents	(1,956)	(1,674)
Cash and cash equivalents, beginning of year	3,863	5,150
Cash and cash equivalents, end of period	$ 1,907	$ 3,476