Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Operating Activities
Net earnings	$ 1,073	$ 1,015
Adjustments to reconcile to net cash provided by (used in) operating activities:
Depreciation and amortization	209	216
Stock-based compensation	37	47
Excess tax benefits from stock-based compensation	0	(106)
Deferred income taxes	(89)	139
Changes in assets and liabilities:
Accounts receivable, net	(647)	(344)
Inventoried costs, net	(170)	(117)
Prepaid expenses and other assets	7	48
Accounts payable and other liabilities	(287)	(870)
Income taxes payable	225	314
Retiree benefits	209	(378)
Other, net	(23)	8
Net cash provided by (used in) operating activities	544	(28)
Investing activities
Capital expenditures	(471)	(232)
Other, net	2	(2)
Net cash used in investing activities	(469)	(234)
Financing activities
Common stock repurchases	(682)	(1,916)
Net proceeds from issuance of long-term debt	0	600
Repayments of long-term debt	(107)	0
Cash dividends paid	(322)	(309)
Payments of employees taxes withheld from share-based awards	(150)	(172)
Other, net	6	103
Net cash used in financing activities	(1,255)	(1,694)
Decrease in cash and cash equivalents	(1,180)	(1,956)
Cash and cash equivalents, beginning of year	2,319	3,863
Cash and cash equivalents, end of period	$ 1,139	$ 1,907