Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 25, 2017	Jun. 26, 2016
Operating activities
Net earnings	$ 1,705	$ 1,919
Adjustments to reconcile net earnings to net cash provided by operating activities
Depreciation and amortization	581	593
Stock-based compensation	101	97
Severance charges		99
Changes in assets and liabilities
Receivables, net	(560)	(1,214)
Inventories, net	(271)	(233)
Accounts payable	940	806
Customer advances and amounts in excess of costs incurred	(316)	239
Postretirement benefit plans	685	515
Income taxes	3	237
Other, net	342	82
Net cash provided by operating activities	3,210	3,140
Investing activities
Capital expenditures	(448)	(386)
Other, net	9	59
Net cash used for investing activities	(439)	(327)
Financing activities
Repurchases of common stock	(1,000)	(1,002)
Dividends paid	(1,069)	(1,034)
Repayments of long-term debt		(452)
Proceeds from stock option exercises	44	53
Other, net	(131)	(199)
Net cash used for financing activities	(2,156)	(2,634)
Net change in cash and cash equivalents	615	179
Cash and cash equivalents at beginning of period	1,837	1,090
Cash and cash equivalents at end of period	$ 2,452	$ 1,269