Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019
Operating activities
Net earnings	$ 5,041	$ 4,732
Adjustments to reconcile net earnings to net cash provided by operating activities
Depreciation and amortization	927	867
Stock-based compensation	182	158
Equity method investment impairment	128	0
Tax resolution related to former IS&GS business	55	0
Gain on property sale	0	(51)
Changes in assets and liabilities
Receivables, net	(143)	60
Contract assets	(1,294)	(1,532)
Inventories	326	(477)
Accounts payable	247	524
Contract liabilities	300	286
Postretirement benefit plans	(130)	828
Income taxes	58	(117)
Other, net	679	543
Net cash provided by operating activities	6,376	5,821
Investing activities
Capital expenditures	(1,044)	(841)
Other, net	27	38
Net cash used for investing activities	(1,017)	(803)
Financing activities
Dividends paid	(2,036)	(1,881)
Repurchases of common stock	(1,100)	(710)
Issuance of long-term debt, net of related costs	1,131	0
Repayments of current and long-term debt	(1,150)	0
Repayments of commercial paper, net	0	(600)
Other, net	(133)	(60)
Net cash used for financing activities	(3,288)	(3,251)
Net change in cash and cash equivalents	2,071	1,767
Cash and cash equivalents at beginning of period	1,514	772
Cash and cash equivalents at end of period	$ 3,585	$ 2,539