Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 25, 2012
Operating activities
Net earnings	$ 761		$ 668
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	232		231
Stock-based compensation	53		41
Severance charges	30	[1]
Changes in operating assets and liabilities:
Receivables, net	(384)		(654)
Inventories, net	43		104
Accounts payable	83		116
Customer advances and amounts in excess of costs incurred	(98)		(251)
Postretirement benefit plans	493		(8)
Income taxes	862		111
Other, net	10		100
Net cash provided by operating activities	2,085		458
Investing activities
Capital expenditures	(106)		(131)
Other, net	(50)		(18)
Net cash used for investing activities	(156)		(149)
Financing activities
Repurchases of common stock	(461)		(242)
Proceeds from stock option exercises	55		159
Dividends paid	(371)		(327)
Other, net	15		37
Net cash used for financing activities	(762)		(373)
Net change in cash and cash equivalents	1,167		(64)
Cash and cash equivalents at beginning of period	1,898		3,582
Cash and cash equivalents at end of period	$ 3,065		$ 3,518

[1] Severance charges for 2013 consisted of amounts, net of state tax benefits, associated with the elimination of certain positions at our IS&GS business segment (Note 8, under the caption "Severance Activities"). Severance charges for initiatives that are not significant are included in business segment operating profit.