Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 26, 2016	Jun. 28, 2015
Operating activities
Net earnings	$ 1,919	$ 1,807
Adjustments to reconcile net earnings to net cash provided by operating activities
Depreciation and amortization	593	490
Stock-based compensation	97	89
Severance charges	99
Changes in assets and liabilities
Receivables, net	(1,214)	(1,183)
Inventories, net	(233)	(154)
Accounts payable	806	453
Customer advances and amounts in excess of costs incurred	239	(211)
Postretirement benefit plans	515	580
Income taxes	237	471
Other, net	82	(122)
Net cash provided by operating activities	3,140	2,220
Investing activities
Capital expenditures	(386)	(309)
Other, net	59	91
Net cash used for investing activities	(327)	(218)
Financing activities
Issuance of long-term debt, net of related costs		2,213
Repayments of long-term debt	(452)
Repurchases of common stock	(1,002)	(1,541)
Dividends paid	(1,034)	(965)
Proceeds from stock option exercises	53	84
Other, net	(199)	(37)
Net cash used for financing activities	(2,634)	(246)
Net change in cash and cash equivalents	179	1,756
Cash and cash equivalents at beginning of period	1,090	1,446
Cash and cash equivalents at end of period	$ 1,269	$ 3,202