Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating activities
Net earnings	$ 2,056	$ 4,896	$ 7,005
Adjustments to reconcile to net cash provided by operating activities:
Depreciation and amortization	1,338	1,342	1,239
Mark-to-market pension and OPB expense (benefit)	422	(1,232)	(2,355)
Stock-based compensation	87	99	94
Deferred income taxes	(988)	(321)	603
Gain on sale of business	0	0	(1,980)
B-21 Charge	1,559	0	0
Net periodic pension and OPB income	(308)	(1,193)	(1,091)
Pension and OPB contributions	(139)	(136)	(141)
Changes in assets and liabilities:
Accounts receivable, net	54	(44)	(10)
Unbilled receivables, net	247	(646)	(414)
Inventoried costs, net	(220)	(205)	(52)
Prepaid expenses and other assets	(86)	2	66
Accounts payable and other liabilities	519	572	376
Income taxes payable, net	(658)	(279)	215
Other, net	(8)	46	12
Net cash provided by operating activities	3,875	2,901	3,567
Investing activities
Divestiture of IT services business	0	0	3,400
Capital expenditures	(1,775)	(1,435)	(1,415)
Proceeds from sale of equipment to a customer	0	155	84
Proceeds from Sale, Maturity and Collection of Investments	197	0	0
Other, net	(4)	39	(11)
Net cash (used in) provided by investing activities	(1,582)	(1,241)	2,058
Financing activities
Net proceeds from issuance of long-term debt	1,995	0	0
Payments of long-term debt	(1,050)	0	(2,236)
Common stock repurchases	(1,500)	(1,504)	(3,705)
Cash dividends paid	(1,116)	(1,052)	(983)
Payments of employee taxes withheld from share-based awards	(52)	(50)	(34)
Other, net	(38)	(7)	(44)
Net cash used in financing activities	(1,761)	(2,613)	(7,002)
Increase (decrease) in cash and cash equivalents	532	(953)	(1,377)
Cash and cash equivalents, beginning of year	2,577	3,530	4,907
Cash and cash equivalents, end of year	$ 3,109	$ 2,577	$ 3,530