OTHER - Contract Estimates (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 25, 2023	Jun. 30, 2024	Jun. 25, 2023	Mar. 31, 2024
Change in Accounting Estimate [Line Items]
Net profit booking rate adjustments increased sales	$ 383	$ 359	$ 655	$ 792
Adjustments increased segment operating profit	420	365	615	780
Increase in net income (loss)	$ 332	$ 288	$ 486	$ 616
Increase in diluted earnings per common share due to profit rate adjustments (in dollars per share)	$ 1.39	$ 1.14	$ 2.02	$ 2.42
Contracts Accounted for under Percentage of Completion
Change in Accounting Estimate [Line Items]
Cumulative gain on development	$ 100		$ 100
Canadian Government
Change in Accounting Estimate [Line Items]
Contract assets	970		970
Canadian Maritime Helicopter Program
Change in Accounting Estimate [Line Items]
Reach-forward loss	100		100
Favorable profit adjustments		$ 65
Missiles and Fire Control
Change in Accounting Estimate [Line Items]
Reach-forward loss	100		100		$ 100
Cumulative gain on development	150		150
Additional options of potential loss			1,300
Aeronautics | Classified Fixed-Price Incentive Fee Contract
Change in Accounting Estimate [Line Items]
Additional losses	45		45
Cumulative gain on development	$ 335		$ 335