Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Operating activities
Net earnings	$ 3,614		$ 2,981		$ 2,745
Adjustments to reconcile net earnings to net cash provided by operating activities
Depreciation and amortization	994		990		988
Stock-based compensation	164		189		167
Deferred income taxes	(401)		(5)		930
Goodwill impairment charges	119	[1]	195	[1]
Severance charges			201	[2]	48	[2]
Changes in assets and liabilities
Receivables, net	28		767		(460)
Inventories, net	77		(60)		(422)
Accounts payable	95		(647)		(236)
Customer advances and amounts in excess of costs incurred	(572)		(158)		57
Postretirement benefit plans	(880)		(375)		(1,883)
Income taxes	351		364		(535)
Other, net	277		104		162
Net cash provided by operating activities	3,866		4,546		1,561
Investing activities
Capital expenditures	(845)		(836)		(942)
Acquisitions of businesses and investments in affiliates	(898)		(269)		(259)
Other, net	20		(16)		24
Net cash used for investing activities	(1,723)		(1,121)		(1,177)
Financing activities
Repurchases of common stock	(1,900)		(1,762)		(990)
Proceeds from stock option exercises	308		827		440
Dividends paid	(1,760)		(1,540)		(1,352)
Repayments of long-term debt			(150)
Premium paid on debt exchange					(225)
Other, net	38		(81)		59
Net cash used for financing activities	(3,314)		(2,706)		(2,068)
Net change in cash and cash equivalents	(1,171)		719		(1,684)
Cash and cash equivalents at beginning of year	2,617		1,898		3,582
Cash and cash equivalents at end of year	$ 1,446		$ 2,617		$ 1,898

[1] 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.

[2] See Note 14 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.