Consolidated Statements of Cash Flows - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014		Dec. 31, 2013
Operating activities
Net earnings		$ 3,605	$ 3,614		$ 2,981
Adjustments to reconcile net earnings to net cash provided by operating activities
Depreciation and amortization		1,026	994		990
Stock-based compensation		138	164		189
Deferred income taxes		(445)	(401)		(5)
Goodwill impairment charges	[2]		119	[1]	195
Severance charges	[3]	102			201
Changes in assets and liabilities
Receivables, net		(256)	28		767
Inventories, net		(398)	77		(60)
Accounts payable		(160)	95		(647)
Customer advances and amounts in excess of costs incurred		(32)	(572)		(158)
Postretirement benefit plans		1,068	(880)		(375)
Income taxes		(48)	351		364
Other, net		501	277		104
Net cash provided by operating activities		5,101	3,866		4,546
Investing activities
Capital expenditures		(939)	(845)		(836)
Acquisitions of businesses and investments in affiliates		(9,003)	(898)		(269)
Other, net		208	20		(16)
Net cash used for investing activities		(9,734)	(1,723)		(1,121)
Financing activities
Repurchases of common stock		(3,071)	(1,900)		(1,762)
Proceeds from stock option exercises		174	308		827
Dividends paid		(1,932)	(1,760)		(1,540)
Proceeds from the issuance of long-term debt		9,101
Repayments of long-term debt					(150)
Proceeds from borrowings under revolving credit facilities		6,000
Repayments of borrowings under revolving credit facilities		(6,000)
Other, net		5	38		(81)
Net cash provided by (used for) financing activities		4,277	(3,314)		(2,706)
Net change in cash and cash equivalents		(356)	(1,171)		719
Cash and cash equivalents at beginning of year		1,446	2,617		1,898
Cash and cash equivalents at end of year		$ 1,090	$ 1,446		$ 2,617

[1] The impairment in 2014 relates to our Technical Services reporting unit within our IS&GS business segment (Note 1).

[2] We recognized non-cash goodwill impairment charges related to the Technical Services reporting unit within our MFC business segment in 2014 and 2013. See Note 1 for more information.

[3] See Note 15 for information on charges related to certain severance actions at our business segments. Severance charges for initiatives that are not significant are included in business segment operating profit.