Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating activities
Net earnings	$ 955	$ 2,195
Adjustments to reconcile to net cash used in operating activities:
Depreciation and amortization	303	294
Stock-based compensation	18	18
Deferred income taxes	(201)	1
Gain on sale of business	0	(1,980)
Net periodic pension and OPB income	(298)	(272)
Pension and OPB contributions	(36)	(38)
Changes in assets and liabilities:
Accounts receivable, net	(246)	(253)
Unbilled receivables, net	(626)	(357)
Inventoried costs, net	(27)	(101)
Prepaid expenses and other assets	16	(38)
Accounts payable and other liabilities	(732)	(589)
Income taxes payable, net	361	1,028
Other operating activities, net	25	26
Net cash used in operating activities	(488)	(66)
Investing activities
Divestiture of IT services business	0	3,400
Capital expenditures	(244)	(205)
Other investing activities, net	(5)	1
Net cash (used in) provided by investing activities	(249)	3,196
Financing activities
Payments of long-term debt	0	(2,200)
Common stock repurchases	(318)	(2,000)
Cash dividends paid	(251)	(238)
Payments of employee taxes withheld from share-based awards	(48)	(30)
Other financing activities, net	(2)	(52)
Net cash used in financing activities	(619)	(4,520)
Decrease in cash and cash equivalents	(1,356)	(1,390)
Cash and cash equivalents, beginning of year	3,530	4,907
Cash and cash equivalents, end of period	$ 2,174	$ 3,517