OTHER - Contract Estimates (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 26, 2023
Change in Accounting Estimate [Line Items]
Net profit booking rate adjustments increased sales	$ 272	$ 433
Adjustments increased segment operating profit	195	415
Increase (decrease) in net income (loss)	$ 154	$ 328
Increase in diluted earnings per common share due to profit rate adjustments (in dollars per share)	$ 0.64	$ 1.28
Missiles and Fire Control
Change in Accounting Estimate [Line Items]
Reach-forward loss	$ 100
Cumulative gain on development	150
Additional options of potential loss	1,300
Rotary and Mission Systems | Classified Fixed-Price Incentive Fee Contract | Maximum
Change in Accounting Estimate [Line Items]
Cumulative gain on development	260
Classified Fixed-Price Incentive Fee Contract | Aeronautics
Change in Accounting Estimate [Line Items]
Additional losses	20
Cumulative gain on development	290
Classified Fixed-Price Incentive Fee Contract | Rotary and Mission Systems
Change in Accounting Estimate [Line Items]
Cumulative gain on development	20
Contracts Accounted for under Percentage of Completion
Change in Accounting Estimate [Line Items]
Cumulative gain on development	100
Canadian Government
Change in Accounting Estimate [Line Items]
Contract assets	$ 970